Linux系统是一个多用户多任务的分时操作系统，任何一个要使用系统资源的用户，都必须首先向系统管理员申请一个账号，然后以这个账号的身份进入系统。
用户的账号一方面可以帮助系统管理员对使用系统的用户进行跟踪，并控制他们对系统资源的访问；另一方面也可以帮助用户组织文件，并为用户提供安全性保护。
每个用户账号都拥有一个唯一的用户名和各自的口令。
用户在登录时键入正确的用户名和口令后，就能够进入系统和自己的主目录。
实现用户账号的管理，要完成的工作主要有如下几个方面：
- 用户账号的添加、删除与修改。
- 用户口令的管理。
- 用户组的管理。
一、Linux系统用户账号的管理
用户账号的管理工作主要涉及到用户账号的添加、修改和删除。
添加用户账号就是在系统中创建一个新账号，然后为新账号分配用户号、用户组、主目录和登录Shell等资源。刚添加的账号是被锁定的，无法使用。
1、添加新的用户账号使用useradd命令，其语法如下：
useradd 选项 用户名
参数说明：
-
选项:
- -c comment 指定一段注释性描述。
- -d 目录 指定用户主目录，如果此目录不存在，则同时使用-m选项，可以创建主目录。
- -g 用户组 指定用户所属的用户组。
- -G 用户组，用户组 指定用户所属的附加组。
- -s Shell文件 指定用户的登录Shell。
- -u 用户号 指定用户的用户号，如果同时有-o选项，则可以重复使用其他用户的标识号。
-
用户名:
指定新账号的登录名。
实例1
# useradd –d /home/sam -m sam
此命令创建了一个用户sam，其中-d和-m选项用来为登录名sam产生一个主目录 /home/sam（/home为默认的用户主目录所在的父目录）。
实例2
# useradd -s /bin/sh -g group –G adm,root gem
此命令新建了一个用户gem，该用户的登录Shell是 /bin/sh，它属于group用户组，同时又属于adm和root用户组，其中group用户组是其主组。
这里可能新建组：#groupadd group及groupadd adm
增加用户账号就是在/etc/passwd文件中为新用户增加一条记录，同时更新其他系统文件如/etc/shadow, /etc/group等。
Linux提供了集成的系统管理工具userconf，它可以用来对用户账号进行统一管理。
2、删除帐号
如果一个用户的账号不再使用，可以从系统中删除。删除用户账号就是要将/etc/passwd等系统文件中的该用户记录删除，必要时还删除用户的主目录。
删除一个已有的用户账号使用userdel命令，其格式如下：
userdel 选项 用户名
常用的选项是 -r，它的作用是把用户的主目录一起删除。
例如：
# userdel -r sam
此命令删除用户sam在系统文件中（主要是/etc/passwd, /etc/shadow, /etc/group等）的记录，同时删除用户的主目录。
3、修改帐号
修改用户账号就是根据实际情况更改用户的有关属性，如用户号、主目录、用户组、登录Shell等。
修改已有用户的信息使用usermod命令，其格式如下：
usermod 选项 用户名
常用的选项包括-c, -d, -m, -g, -G, -s, -u以及-o等，这些选项的意义与useradd命令中的选项一样，可以为用户指定新的资源值。
另外，有些系统可以使用选项：-l 新用户名
这个选项指定一个新的账号，即将原来的用户名改为新的用户名。
例如：
# usermod -s /bin/ksh -d /home/z –g developer sam
此命令将用户sam的登录Shell修改为ksh，主目录改为/home/z，用户组改为developer。
4、用户口令的管理
用户管理的一项重要内容是用户口令的管理。用户账号刚创建时没有口令，但是被系统锁定，无法使用，必须为其指定口令后才可以使用，即使是指定空口令。
指定和修改用户口令的Shell命令是passwd。超级用户可以为自己和其他用户指定口令，普通用户只能用它修改自己的口令。命令的格式为：
passwd 选项 用户名
可使用的选项：
- -l 锁定口令，即禁用账号。
- -u 口令解锁。
- -d 使账号无口令。
- -f 强迫用户下次登录时修改口令。
如果默认用户名，则修改当前用户的口令。
例如，假设当前用户是sam，则下面的命令修改该用户自己的口令：
$ passwd
Old password:******
New password:*******
Re-enter new password:*******
如果是超级用户，可以用下列形式指定任何用户的口令：
# passwd sam
New password:*******
Re-enter new password:*******
普通用户修改自己的口令时，passwd命令会先询问原口令，验证后再要求用户输入两遍新口令，如果两次输入的口令一致，则将这个口令指定给用户；而超级用户为用户指定口令时，就不需要知道原口令。
为了系统安全起见，用户应该选择比较复杂的口令，例如最好使用8位长的口令，口令中包含有大写、小写字母和数字，并且应该与姓名、生日等不相同。
为用户指定空口令时，执行下列形式的命令：
# passwd -d sam
此命令将用户 sam 的口令删除，这样用户 sam 下一次登录时，系统就不再允许该用户登录了。
passwd 命令还可以用 -l(lock) 选项锁定某一用户，使其不能登录，例如：
# passwd -l sam
二、Linux系统用户组的管理
https://ibaotu.com/tupian/397561208.html
https://ibaotu.com/tupian/397561130.html
https://ibaotu.com/tupian/397561054.html
https://ibaotu.com/tupian/397560989.html
https://ibaotu.com/tupian/397560920.html
https://ibaotu.com/tupian/397560858.html
https://ibaotu.com/tupian/397560790.html
https://ibaotu.com/tupian/397560711.html
https://ibaotu.com/tupian/397560625.html
https://ibaotu.com/tupian/397560542.html
https://ibaotu.com/tupian/397560467.html
https://ibaotu.com/tupian/397560374.html
https://ibaotu.com/tupian/397560275.html
https://ibaotu.com/tupian/397560183.html
https://ibaotu.com/tupian/397560087.html
https://ibaotu.com/tupian/397560006.html
https://ibaotu.com/tupian/397559926.html
https://ibaotu.com/tupian/397559840.html
https://ibaotu.com/tupian/397559774.html
https://ibaotu.com/tupian/397559723.html
https://ibaotu.com/tupian/397559646.html
https://ibaotu.com/tupian/397559573.html
https://ibaotu.com/tupian/397559500.html
https://ibaotu.com/tupian/397559444.html
https://ibaotu.com/tupian/397559375.html
https://ibaotu.com/tupian/397559321.html
https://ibaotu.com/tupian/397559257.html
https://ibaotu.com/tupian/397559193.html
https://ibaotu.com/tupian/397559109.html
https://ibaotu.com/tupian/397559014.html
https://ibaotu.com/tupian/397558936.html
https://ibaotu.com/tupian/397558858.html
https://ibaotu.com/tupian/397558790.html
https://ibaotu.com/tupian/397558730.html
https://ibaotu.com/tupian/397558668.html
https://ibaotu.com/tupian/397558602.html
https://ibaotu.com/tupian/397558528.html
https://ibaotu.com/tupian/397558449.html
https://ibaotu.com/tupian/397558422.html
https://ibaotu.com/tupian/397558364.html
https://ibaotu.com/tupian/397558317.html
https://ibaotu.com/tupian/397558264.html
https://ibaotu.com/tupian/397558201.html
https://ibaotu.com/tupian/397558119.html
https://ibaotu.com/tupian/397558033.html
https://ibaotu.com/tupian/397557968.html
https://ibaotu.com/tupian/397557918.html
https://ibaotu.com/tupian/397557860.html
https://ibaotu.com/tupian/397557812.html
https://ibaotu.com/tupian/397557746.html
https://ibaotu.com/tupian/397557695.html
https://ibaotu.com/tupian/397557638.html
https://ibaotu.com/tupian/397557562.html
https://ibaotu.com/tupian/397557490.html
https://ibaotu.com/tupian/397557404.html
https://ibaotu.com/tupian/397557322.html
https://ibaotu.com/tupian/397557241.html
https://ibaotu.com/tupian/397557162.html
https://ibaotu.com/tupian/397557069.html
https://ibaotu.com/tupian/397556979.html
https://ibaotu.com/tupian/397556896.html
https://ibaotu.com/tupian/397556811.html
https://ibaotu.com/tupian/397556720.html
https://ibaotu.com/tupian/397556650.html
https://ibaotu.com/tupian/397556569.html
https://ibaotu.com/tupian/397556495.html
https://ibaotu.com/tupian/397556427.html
https://ibaotu.com/tupian/397556346.html
https://ibaotu.com/tupian/397556275.html
https://ibaotu.com/tupian/397556212.html
https://ibaotu.com/tupian/397556137.html
https://ibaotu.com/tupian/397556066.html
https://ibaotu.com/tupian/397555979.html
https://ibaotu.com/tupian/397555891.html
https://ibaotu.com/tupian/397555774.html
https://ibaotu.com/tupian/397555699.html
https://ibaotu.com/tupian/397555614.html
https://ibaotu.com/tupian/397555526.html
https://ibaotu.com/tupian/397555443.html
https://ibaotu.com/tupian/397555348.html
https://ibaotu.com/tupian/397555273.html
https://ibaotu.com/tupian/397555189.html
https://ibaotu.com/tupian/397555095.html
https://ibaotu.com/tupian/397554995.html
https://ibaotu.com/tupian/397554900.html
https://ibaotu.com/tupian/397554815.html
https://ibaotu.com/tupian/397554736.html
https://ibaotu.com/tupian/397554645.html
https://ibaotu.com/tupian/397554556.html
https://ibaotu.com/tupian/397554463.html
https://ibaotu.com/tupian/397554368.html
https://ibaotu.com/tupian/397554283.html
https://ibaotu.com/tupian/397554206.html
https://ibaotu.com/tupian/397554121.html
https://ibaotu.com/tupian/397554030.html
https://ibaotu.com/tupian/397553932.html
https://ibaotu.com/tupian/397553841.html
https://ibaotu.com/tupian/397553771.html
https://ibaotu.com/tupian/397553686.html
https://ibaotu.com/tupian/397553593.html
https://ibaotu.com/tupian/397553511.html
https://ibaotu.com/tupian/397553457.html
https://ibaotu.com/tupian/397553393.html
https://ibaotu.com/tupian/397553341.html
https://ibaotu.com/tupian/397553283.html
https://ibaotu.com/tupian/397553231.html
https://ibaotu.com/tupian/397553184.html
https://ibaotu.com/tupian/397553134.html
https://ibaotu.com/tupian/397553060.html
https://ibaotu.com/tupian/397553003.html
https://ibaotu.com/tupian/397552943.html
https://ibaotu.com/tupian/397552879.html
https://ibaotu.com/tupian/397552806.html
https://ibaotu.com/tupian/397552738.html
https://ibaotu.com/tupian/397552654.html
https://ibaotu.com/tupian/397552579.html
https://ibaotu.com/tupian/397552507.html
https://ibaotu.com/tupian/397552414.html
https://ibaotu.com/tupian/397552317.html
https://ibaotu.com/tupian/397552234.html
https://ibaotu.com/tupian/397552148.html
https://ibaotu.com/tupian/397552077.html
https://ibaotu.com/tupian/397552026.html
https://ibaotu.com/tupian/397551936.html
https://ibaotu.com/tupian/397551861.html
https://ibaotu.com/tupian/397551778.html
https://ibaotu.com/tupian/397551695.html
https://ibaotu.com/tupian/397551625.html
https://ibaotu.com/tupian/397551527.html
https://ibaotu.com/tupian/397551442.html
https://ibaotu.com/tupian/397551351.html
https://ibaotu.com/tupian/397551256.html
https://ibaotu.com/tupian/397551162.html
https://ibaotu.com/tupian/397551076.html
https://ibaotu.com/tupian/397551013.html
https://ibaotu.com/tupian/397550968.html
https://ibaotu.com/tupian/397550919.html
https://ibaotu.com/tupian/397550863.html
https://ibaotu.com/tupian/397550818.html
https://ibaotu.com/tupian/397550756.html
https://ibaotu.com/tupian/397550712.html
https://ibaotu.com/tupian/397550650.html
https://ibaotu.com/tupian/397550611.html
https://ibaotu.com/tupian/397550562.html
https://ibaotu.com/tupian/397550510.html
https://ibaotu.com/tupian/397550472.html
https://ibaotu.com/tupian/397550403.html
https://ibaotu.com/tupian/397550329.html
https://ibaotu.com/tupian/397550246.html
https://ibaotu.com/tupian/397550176.html
https://ibaotu.com/tupian/397550107.html
https://ibaotu.com/tupian/397550042.html
https://ibaotu.com/tupian/397549988.html
https://ibaotu.com/tupian/397549927.html
https://ibaotu.com/tupian/397549859.html
https://ibaotu.com/tupian/397549811.html
https://ibaotu.com/tupian/397549755.html
https://ibaotu.com/tupian/397549673.html
https://ibaotu.com/tupian/397549596.html
https://ibaotu.com/tupian/397549524.html
https://ibaotu.com/tupian/397549465.html
https://ibaotu.com/tupian/397549394.html
https://ibaotu.com/tupian/397549318.html
https://ibaotu.com/tupian/397549240.html
https://ibaotu.com/tupian/397549163.html
https://ibaotu.com/tupian/397549075.html
https://ibaotu.com/tupian/397549001.html
https://ibaotu.com/tupian/397548918.html
https://ibaotu.com/tupian/397548857.html
https://ibaotu.com/tupian/397548779.html
https://ibaotu.com/tupian/397548723.html
https://ibaotu.com/tupian/397548628.html
https://ibaotu.com/tupian/397548533.html
https://ibaotu.com/tupian/397548447.html
https://ibaotu.com/tupian/397548338.html
https://ibaotu.com/tupian/397548250.html
https://ibaotu.com/tupian/397548162.html
https://ibaotu.com/tupian/397548056.html
https://ibaotu.com/tupian/397547980.html
https://ibaotu.com/tupian/397547899.html
https://ibaotu.com/tupian/397547813.html
https://ibaotu.com/tupian/397547741.html
https://ibaotu.com/tupian/397547642.html
https://ibaotu.com/tupian/397547547.html
https://ibaotu.com/tupian/397547453.html
https://ibaotu.com/tupian/397547368.html
https://ibaotu.com/tupian/397547283.html
https://ibaotu.com/tupian/397547190.html
https://ibaotu.com/tupian/397547099.html
https://ibaotu.com/tupian/397547007.html
https://ibaotu.com/tupian/397546926.html
https://ibaotu.com/tupian/397546838.html
https://ibaotu.com/tupian/397546759.html
https://ibaotu.com/tupian/397546675.html
https://ibaotu.com/tupian/397546582.html
https://ibaotu.com/tupian/397546503.html
https://ibaotu.com/tupian/397546413.html
https://ibaotu.com/tupian/397546324.html
https://ibaotu.com/tupian/397546238.html
https://ibaotu.com/tupian/397546143.html
https://ibaotu.com/tupian/397546048.html
https://ibaotu.com/tupian/397545953.html
https://ibaotu.com/tupian/397545847.html
https://ibaotu.com/tupian/397545774.html
https://ibaotu.com/tupian/397545673.html
https://ibaotu.com/tupian/397545570.html
https://ibaotu.com/tupian/397545468.html
https://ibaotu.com/tupian/397545369.html
https://ibaotu.com/tupian/397545278.html
https://ibaotu.com/tupian/397545174.html
https://ibaotu.com/tupian/397545074.html
https://ibaotu.com/tupian/397544970.html
https://ibaotu.com/tupian/397544866.html
https://ibaotu.com/tupian/397544761.html
https://ibaotu.com/tupian/397544671.html
https://ibaotu.com/tupian/397544615.html
https://ibaotu.com/tupian/397544541.html
https://ibaotu.com/tupian/397544470.html
https://ibaotu.com/tupian/397544394.html
https://ibaotu.com/tupian/397544313.html
https://ibaotu.com/tupian/397544264.html
https://ibaotu.com/tupian/397544204.html
https://ibaotu.com/tupian/397544155.html
https://ibaotu.com/tupian/397544093.html
https://ibaotu.com/tupian/397544060.html
https://ibaotu.com/tupian/397543987.html
https://ibaotu.com/tupian/397543932.html
https://ibaotu.com/tupian/397543873.html
https://ibaotu.com/tupian/397543792.html
https://ibaotu.com/tupian/397543725.html
https://ibaotu.com/tupian/397543660.html
https://ibaotu.com/tupian/397543596.html
https://ibaotu.com/tupian/397543514.html
https://ibaotu.com/tupian/397543432.html
https://ibaotu.com/tupian/397543331.html
https://ibaotu.com/tupian/397543252.html
https://ibaotu.com/tupian/397543170.html
https://ibaotu.com/tupian/397543082.html
https://ibaotu.com/tupian/397542986.html
https://ibaotu.com/tupian/397542887.html
https://ibaotu.com/tupian/397542788.html
https://ibaotu.com/tupian/397542716.html
https://ibaotu.com/tupian/397542655.html
https://ibaotu.com/tupian/397542588.html
https://ibaotu.com/tupian/397542491.html
https://ibaotu.com/tupian/397542396.html
https://ibaotu.com/tupian/397542311.html
https://ibaotu.com/tupian/397542198.html
https://ibaotu.com/tupian/397542115.html
https://ibaotu.com/tupian/397542040.html
https://ibaotu.com/tupian/397541963.html
https://ibaotu.com/tupian/397541862.html
https://ibaotu.com/tupian/397541773.html
https://ibaotu.com/tupian/397541662.html
https://ibaotu.com/tupian/397541560.html
https://ibaotu.com/tupian/397541486.html
https://ibaotu.com/tupian/397541427.html
https://ibaotu.com/tupian/397541370.html
https://ibaotu.com/tupian/397541322.html
https://ibaotu.com/tupian/397541269.html
https://ibaotu.com/tupian/397541211.html
https://ibaotu.com/tupian/397541156.html
https://ibaotu.com/tupian/397541091.html
https://ibaotu.com/tupian/397541041.html
https://ibaotu.com/tupian/397540993.html
https://ibaotu.com/tupian/397540935.html
https://ibaotu.com/tupian/397540878.html
https://ibaotu.com/tupian/397540816.html
https://ibaotu.com/tupian/397540753.html
https://ibaotu.com/tupian/397540679.html
https://ibaotu.com/tupian/397540573.html
https://ibaotu.com/tupian/397540477.html
https://ibaotu.com/tupian/397540409.html
https://ibaotu.com/tupian/397540346.html
https://ibaotu.com/tupian/397540279.html
https://ibaotu.com/tupian/397540221.html
https://ibaotu.com/tupian/397540139.html
https://ibaotu.com/tupian/397540055.html
https://ibaotu.com/tupian/397539974.html
https://ibaotu.com/tupian/397539898.html
https://ibaotu.com/tupian/397539790.html
https://ibaotu.com/tupian/397539692.html
https://ibaotu.com/tupian/397539614.html
https://ibaotu.com/tupian/397539527.html
https://ibaotu.com/tupian/397539425.html
https://ibaotu.com/tupian/397539347.html
https://ibaotu.com/tupian/397539282.html
https://ibaotu.com/tupian/397539222.html
https://ibaotu.com/tupian/397539150.html
https://ibaotu.com/tupian/397539091.html
https://ibaotu.com/tupian/397539000.html
https://ibaotu.com/tupian/397538894.html
https://ibaotu.com/tupian/397538794.html
https://ibaotu.com/tupian/397538685.html
https://ibaotu.com/tupian/397538600.html
https://ibaotu.com/tupian/397538517.html
https://ibaotu.com/tupian/397538426.html
https://ibaotu.com/tupian/397538348.html
https://ibaotu.com/tupian/397538284.html
https://ibaotu.com/tupian/397538181.html
https://ibaotu.com/tupian/397538129.html
https://ibaotu.com/tupian/397538043.html
https://ibaotu.com/tupian/397537945.html
https://ibaotu.com/tupian/397537860.html
https://ibaotu.com/tupian/397537756.html
https://ibaotu.com/tupian/397537642.html
https://ibaotu.com/tupian/397537549.html
https://ibaotu.com/tupian/397537449.html
https://ibaotu.com/tupian/397537347.html
https://ibaotu.com/tupian/397537236.html
https://ibaotu.com/tupian/397537120.html
https://ibaotu.com/tupian/397537023.html
https://ibaotu.com/tupian/397536919.html
https://ibaotu.com/tupian/397536828.html
https://ibaotu.com/tupian/397536727.html
https://ibaotu.com/tupian/397536621.html
https://ibaotu.com/tupian/397536533.html
https://ibaotu.com/tupian/397536430.html
https://ibaotu.com/tupian/397536329.html
https://ibaotu.com/tupian/397536215.html
https://ibaotu.com/tupian/397536110.html
https://ibaotu.com/tupian/397536009.html
https://ibaotu.com/tupian/397535902.html
https://ibaotu.com/tupian/397535785.html
https://ibaotu.com/tupian/397535681.html
https://ibaotu.com/tupian/397535584.html
https://ibaotu.com/tupian/397535472.html
https://ibaotu.com/tupian/397535366.html
https://ibaotu.com/tupian/397535272.html
https://ibaotu.com/tupian/397535166.html
https://ibaotu.com/tupian/397535079.html
https://ibaotu.com/tupian/397534975.html
https://ibaotu.com/tupian/397534876.html
https://ibaotu.com/tupian/397534772.html
https://ibaotu.com/tupian/397534680.html
https://ibaotu.com/tupian/397534581.html
https://ibaotu.com/tupian/397534491.html
https://ibaotu.com/tupian/397534402.html
https://ibaotu.com/tupian/397534297.html
https://ibaotu.com/tupian/397534189.html
https://ibaotu.com/tupian/397534084.html
https://ibaotu.com/tupian/397533972.html
https://ibaotu.com/tupian/397533883.html
https://ibaotu.com/tupian/397533800.html
https://ibaotu.com/tupian/397533726.html
https://ibaotu.com/tupian/397533674.html
https://ibaotu.com/tupian/397533604.html
https://ibaotu.com/tupian/397533519.html
https://ibaotu.com/tupian/397533412.html
https://ibaotu.com/tupian/397533307.html
https://ibaotu.com/tupian/397533196.html
https://ibaotu.com/tupian/397533101.html
https://ibaotu.com/tupian/397533000.html
https://ibaotu.com/tupian/397532920.html
https://ibaotu.com/tupian/397532863.html
https://ibaotu.com/tupian/397532794.html
https://ibaotu.com/tupian/397532719.html
https://ibaotu.com/tupian/397532635.html
https://ibaotu.com/tupian/397532568.html
https://ibaotu.com/tupian/397532494.html
https://ibaotu.com/tupian/397532427.html
https://ibaotu.com/tupian/397532354.html
https://ibaotu.com/tupian/397532285.html
https://ibaotu.com/tupian/397532180.html
https://ibaotu.com/tupian/397532072.html
https://ibaotu.com/tupian/397531968.html
https://ibaotu.com/tupian/397531864.html
https://ibaotu.com/tupian/397531775.html
https://ibaotu.com/tupian/397531698.html
https://ibaotu.com/tupian/397531604.html
https://ibaotu.com/tupian/397531505.html
https://ibaotu.com/tupian/397531387.html
https://ibaotu.com/tupian/397531276.html
https://ibaotu.com/tupian/397531178.html
https://ibaotu.com/tupian/397531050.html
https://ibaotu.com/tupian/397530956.html
https://ibaotu.com/tupian/397530876.html
https://ibaotu.com/tupian/397530779.html
https://ibaotu.com/tupian/397530703.html
https://ibaotu.com/tupian/397530627.html
https://ibaotu.com/tupian/397530550.html
https://ibaotu.com/tupian/397530468.html
https://ibaotu.com/tupian/397530387.html
https://ibaotu.com/tupian/397530273.html
https://ibaotu.com/tupian/397530163.html
https://ibaotu.com/tupian/397530076.html
https://ibaotu.com/tupian/397529980.html
https://ibaotu.com/tupian/397529872.html
https://ibaotu.com/tupian/397529766.html
https://ibaotu.com/tupian/397529672.html
https://ibaotu.com/tupian/397529586.html
https://ibaotu.com/tupian/397529510.html
https://ibaotu.com/tupian/397529448.html
https://ibaotu.com/tupian/397529391.html
https://ibaotu.com/tupian/397529346.html
https://ibaotu.com/tupian/397529307.html
https://ibaotu.com/tupian/397529281.html
https://ibaotu.com/tupian/397529266.html
https://ibaotu.com/tupian/397529252.html
https://ibaotu.com/tupian/397529235.html
https://ibaotu.com/tupian/397529218.html
https://ibaotu.com/tupian/397529203.html
https://ibaotu.com/tupian/397529190.html
https://ibaotu.com/tupian/397529176.html
https://ibaotu.com/tupian/397529162.html
https://ibaotu.com/tupian/397529144.html
https://ibaotu.com/tupian/397529127.html
https://ibaotu.com/tupian/397529115.html
https://ibaotu.com/tupian/397529100.html
https://ibaotu.com/tupian/397529085.html
https://ibaotu.com/tupian/397529071.html
https://ibaotu.com/tupian/397529055.html
https://ibaotu.com/tupian/397529038.html
https://ibaotu.com/tupian/397529024.html
https://ibaotu.com/tupian/397529008.html
https://ibaotu.com/tupian/397528993.html
https://ibaotu.com/tupian/397528977.html
https://ibaotu.com/tupian/397528961.html
https://ibaotu.com/tupian/397528947.html
https://ibaotu.com/tupian/397528930.html
https://ibaotu.com/tupian/397528915.html
https://ibaotu.com/tupian/397528899.html
https://ibaotu.com/tupian/397528885.html
https://ibaotu.com/tupian/397528870.html
https://ibaotu.com/tupian/397528856.html
https://ibaotu.com/tupian/397528839.html
https://ibaotu.com/tupian/397528822.html
https://ibaotu.com/tupian/397528804.html
https://ibaotu.com/tupian/397528792.html
https://ibaotu.com/tupian/397528777.html
https://ibaotu.com/tupian/397528762.html
https://ibaotu.com/tupian/397528747.html
https://ibaotu.com/tupian/397528731.html
https://ibaotu.com/tupian/397528714.html
https://ibaotu.com/tupian/397528701.html
https://ibaotu.com/tupian/397528683.html
https://ibaotu.com/tupian/397528668.html
https://ibaotu.com/tupian/397528652.html
https://ibaotu.com/tupian/397528636.html
https://ibaotu.com/tupian/397528621.html
https://ibaotu.com/tupian/397528607.html
https://ibaotu.com/tupian/397528594.html
https://ibaotu.com/tupian/397528576.html
https://ibaotu.com/tupian/397528564.html
https://ibaotu.com/tupian/397528549.html
https://ibaotu.com/tupian/397528534.html
https://ibaotu.com/tupian/397528517.html
https://ibaotu.com/tupian/397528502.html
https://ibaotu.com/tupian/397528483.html
https://ibaotu.com/tupian/397528470.html
https://ibaotu.com/tupian/397528454.html
https://ibaotu.com/tupian/397528440.html
https://ibaotu.com/tupian/397528423.html
https://ibaotu.com/tupian/397528411.html
https://ibaotu.com/tupian/397528394.html
https://ibaotu.com/tupian/397528378.html
https://ibaotu.com/tupian/397528364.html
https://ibaotu.com/tupian/397528344.html
https://ibaotu.com/tupian/397528329.html
https://ibaotu.com/tupian/397528313.html
https://ibaotu.com/tupian/397528301.html
https://ibaotu.com/tupian/397528286.html
https://ibaotu.com/tupian/397528269.html
https://ibaotu.com/tupian/397528253.html
https://ibaotu.com/tupian/397528236.html
https://ibaotu.com/tupian/397528223.html
https://ibaotu.com/tupian/397528209.html
https://ibaotu.com/tupian/397528191.html
https://ibaotu.com/tupian/397528174.html
https://ibaotu.com/tupian/397528160.html
https://ibaotu.com/tupian/397528146.html
https://ibaotu.com/tupian/397528127.html
https://ibaotu.com/tupian/397528111.html
https://ibaotu.com/tupian/397528096.html
https://ibaotu.com/tupian/397528078.html
https://ibaotu.com/tupian/397528064.html
https://ibaotu.com/tupian/397528050.html
https://ibaotu.com/tupian/397528032.html
https://ibaotu.com/tupian/397528015.html
https://ibaotu.com/tupian/397528002.html
https://ibaotu.com/tupian/397527987.html
https://ibaotu.com/tupian/397527973.html
https://ibaotu.com/tupian/397527958.html
https://ibaotu.com/tupian/397527940.html
https://ibaotu.com/tupian/397527925.html
https://ibaotu.com/tupian/397527908.html
https://ibaotu.com/tupian/397527894.html
https://ibaotu.com/tupian/397527878.html
https://ibaotu.com/tupian/397527860.html
https://ibaotu.com/tupian/397527846.html
https://ibaotu.com/tupian/397527832.html
https://ibaotu.com/tupian/397527816.html
https://ibaotu.com/tupian/397527800.html
https://ibaotu.com/tupian/397527783.html
https://ibaotu.com/tupian/397527768.html
https://ibaotu.com/tupian/397527753.html
https://ibaotu.com/tupian/397527739.html
https://ibaotu.com/tupian/397527723.html
https://ibaotu.com/tupian/397527706.html
https://ibaotu.com/tupian/397527691.html
https://ibaotu.com/tupian/397527676.html
https://ibaotu.com/tupian/397527660.html
https://ibaotu.com/tupian/397527644.html
https://ibaotu.com/tupian/397527627.html
https://ibaotu.com/tupian/397527611.html
https://ibaotu.com/tupian/397527597.html
https://ibaotu.com/tupian/397527583.html
https://ibaotu.com/tupian/397527568.html
https://ibaotu.com/tupian/397527550.html
https://ibaotu.com/tupian/397527534.html
https://ibaotu.com/tupian/397527520.html
https://ibaotu.com/tupian/397527503.html
https://ibaotu.com/tupian/397527488.html
https://ibaotu.com/tupian/397527472.html
https://ibaotu.com/tupian/397527456.html
https://ibaotu.com/tupian/397527442.html
https://ibaotu.com/tupian/397527428.html
https://ibaotu.com/tupian/397527414.html
https://ibaotu.com/tupian/397527399.html
https://ibaotu.com/tupian/397527381.html
https://ibaotu.com/tupian/397527366.html
https://ibaotu.com/tupian/397527349.html
https://ibaotu.com/tupian/397527334.html
https://ibaotu.com/tupian/397527319.html
https://ibaotu.com/tupian/397527305.html
https://ibaotu.com/tupian/397527289.html
https://ibaotu.com/tupian/397527273.html
https://ibaotu.com/tupian/397527259.html
https://ibaotu.com/tupian/397527246.html
https://ibaotu.com/tupian/397527229.html
https://ibaotu.com/tupian/397527211.html
https://ibaotu.com/tupian/397527198.html
https://ibaotu.com/tupian/397527184.html
https://ibaotu.com/tupian/397527170.html
https://ibaotu.com/tupian/397527154.html
https://ibaotu.com/tupian/397527138.html
https://ibaotu.com/tupian/397527123.html
https://ibaotu.com/tupian/397527110.html
https://ibaotu.com/tupian/397527095.html
https://ibaotu.com/tupian/397527081.html
https://ibaotu.com/tupian/397527063.html
https://ibaotu.com/tupian/397527047.html
https://ibaotu.com/tupian/397527033.html
https://ibaotu.com/tupian/397527019.html
https://ibaotu.com/tupian/397527005.html
https://ibaotu.com/tupian/397526990.html
https://ibaotu.com/tupian/397526974.html
https://ibaotu.com/tupian/397526957.html
https://ibaotu.com/tupian/397526944.html
https://ibaotu.com/tupian/397526929.html
https://ibaotu.com/tupian/397526909.html
https://ibaotu.com/tupian/397526895.html
https://ibaotu.com/tupian/397526880.html
https://ibaotu.com/tupian/397526867.html
https://ibaotu.com/tupian/397526852.html
https://ibaotu.com/tupian/397526836.html
https://ibaotu.com/tupian/397526820.html
https://ibaotu.com/tupian/397526805.html
https://ibaotu.com/tupian/397526789.html
https://ibaotu.com/tupian/397526776.html
https://ibaotu.com/tupian/397526753.html
https://ibaotu.com/tupian/397526739.html
https://ibaotu.com/tupian/397526724.html
https://ibaotu.com/tupian/397526710.html
https://ibaotu.com/tupian/397526694.html
https://ibaotu.com/tupian/397526678.html
https://ibaotu.com/tupian/397526660.html
https://ibaotu.com/tupian/397526646.html
https://ibaotu.com/tupian/397526631.html
https://ibaotu.com/tupian/397526618.html
https://ibaotu.com/tupian/397526598.html
https://ibaotu.com/tupian/397526583.html
https://ibaotu.com/tupian/397526566.html
https://ibaotu.com/tupian/397526552.html
https://ibaotu.com/tupian/397526533.html
https://ibaotu.com/tupian/397526518.html
https://ibaotu.com/tupian/397526503.html
https://ibaotu.com/tupian/397526487.html
https://ibaotu.com/tupian/397526472.html
https://ibaotu.com/tupian/397526457.html
https://ibaotu.com/tupian/397526441.html
https://ibaotu.com/tupian/397526421.html
https://ibaotu.com/tupian/397526404.html
https://ibaotu.com/tupian/397526388.html
https://ibaotu.com/tupian/397526373.html
https://ibaotu.com/tupian/397526358.html
https://ibaotu.com/tupian/397526343.html
https://ibaotu.com/tupian/397526329.html
https://ibaotu.com/tupian/397526311.html
https://ibaotu.com/tupian/397526296.html
https://ibaotu.com/tupian/397526278.html
https://ibaotu.com/tupian/397526265.html
https://ibaotu.com/tupian/397526248.html
https://ibaotu.com/tupian/397526229.html
https://ibaotu.com/tupian/397526213.html
https://ibaotu.com/tupian/397526197.html
https://ibaotu.com/tupian/397526183.html
https://ibaotu.com/tupian/397526167.html
https://ibaotu.com/tupian/397526150.html
https://ibaotu.com/tupian/397526134.html
https://ibaotu.com/tupian/397526120.html
https://ibaotu.com/tupian/397526107.html
https://ibaotu.com/tupian/397526091.html
https://ibaotu.com/tupian/397526076.html
https://ibaotu.com/tupian/397526056.html
https://ibaotu.com/tupian/397526039.html
https://ibaotu.com/tupian/397526023.html
https://ibaotu.com/tupian/397526006.html
https://ibaotu.com/tupian/397525991.html
https://ibaotu.com/tupian/397525977.html
https://ibaotu.com/tupian/397525961.html
https://ibaotu.com/tupian/397525945.html
https://ibaotu.com/tupian/397525930.html
https://ibaotu.com/tupian/397525912.html
https://ibaotu.com/tupian/397525897.html
https://ibaotu.com/tupian/397525879.html
https://ibaotu.com/tupian/397525865.html
https://ibaotu.com/tupian/397525850.html
https://ibaotu.com/tupian/397525834.html
https://ibaotu.com/tupian/397525820.html
https://ibaotu.com/tupian/397525805.html
https://ibaotu.com/tupian/397525790.html
https://ibaotu.com/tupian/397525776.html
https://ibaotu.com/tupian/397525763.html
https://ibaotu.com/tupian/397525747.html
https://ibaotu.com/tupian/397525730.html
https://ibaotu.com/tupian/397525712.html
https://ibaotu.com/tupian/397525697.html
https://ibaotu.com/tupian/397525683.html
https://ibaotu.com/tupian/397525668.html
https://ibaotu.com/tupian/397525653.html
https://ibaotu.com/tupian/397525638.html
https://ibaotu.com/tupian/397525624.html
https://ibaotu.com/tupian/397525610.html
https://ibaotu.com/tupian/397525595.html
https://ibaotu.com/tupian/397525580.html
https://ibaotu.com/tupian/397525562.html
https://ibaotu.com/tupian/397525545.html
https://ibaotu.com/tupian/397525532.html
https://ibaotu.com/tupian/397525515.html
https://ibaotu.com/tupian/397525501.html
https://ibaotu.com/tupian/397525487.html
https://ibaotu.com/tupian/397525473.html
https://ibaotu.com/tupian/397525458.html
https://ibaotu.com/tupian/397525443.html
https://ibaotu.com/tupian/397525427.html
https://ibaotu.com/tupian/397525408.html
https://ibaotu.com/tupian/397525393.html
https://ibaotu.com/tupian/397525377.html
https://ibaotu.com/tupian/397525363.html
https://ibaotu.com/tupian/397525348.html
https://ibaotu.com/tupian/397525331.html
https://ibaotu.com/tupian/397525315.html
https://ibaotu.com/tupian/397525300.html
https://ibaotu.com/tupian/397525285.html
https://ibaotu.com/tupian/397525272.html
https://ibaotu.com/tupian/397525252.html
https://ibaotu.com/tupian/397525235.html
https://ibaotu.com/tupian/397525219.html
https://ibaotu.com/tupian/397525204.html
https://ibaotu.com/tupian/397525191.html
https://ibaotu.com/tupian/397525176.html
https://ibaotu.com/tupian/397525161.html
https://ibaotu.com/tupian/397525146.html
https://ibaotu.com/tupian/397525131.html
https://ibaotu.com/tupian/397525115.html
https://ibaotu.com/tupian/397525098.html
https://ibaotu.com/tupian/397525084.html
https://ibaotu.com/tupian/397525069.html
https://ibaotu.com/tupian/397525054.html
https://ibaotu.com/tupian/397525036.html
https://ibaotu.com/tupian/397525020.html
https://ibaotu.com/tupian/397525004.html
https://ibaotu.com/tupian/397524992.html
https://ibaotu.com/tupian/397524975.html
https://ibaotu.com/tupian/397524959.html
https://ibaotu.com/tupian/397524943.html
https://ibaotu.com/tupian/397524926.html
https://ibaotu.com/tupian/397524910.html
https://ibaotu.com/tupian/397524893.html
https://ibaotu.com/tupian/397524878.html
https://ibaotu.com/tupian/397524863.html
https://ibaotu.com/tupian/397524849.html
https://ibaotu.com/tupian/397524833.html
https://ibaotu.com/tupian/397524817.html
https://ibaotu.com/tupian/397524802.html
https://ibaotu.com/tupian/397524785.html
https://ibaotu.com/tupian/397524771.html
https://ibaotu.com/tupian/397524755.html
https://ibaotu.com/tupian/397524738.html
https://ibaotu.com/tupian/397524721.html
https://ibaotu.com/tupian/397524706.html
https://ibaotu.com/tupian/397524690.html
https://ibaotu.com/tupian/397524675.html
https://ibaotu.com/tupian/397524659.html
https://ibaotu.com/tupian/397524642.html
https://ibaotu.com/tupian/397524624.html
https://ibaotu.com/tupian/397524609.html
https://ibaotu.com/tupian/397524594.html
https://ibaotu.com/tupian/397524577.html
https://ibaotu.com/tupian/397524562.html
https://ibaotu.com/tupian/397524547.html
https://ibaotu.com/tupian/397524532.html
https://ibaotu.com/tupian/397524517.html
https://ibaotu.com/tupian/397524502.html
https://ibaotu.com/tupian/397524487.html
https://ibaotu.com/tupian/397524471.html
https://ibaotu.com/tupian/397524456.html
https://ibaotu.com/tupian/397524442.html
https://ibaotu.com/tupian/397524423.html
https://ibaotu.com/tupian/397524408.html
https://ibaotu.com/tupian/397524394.html
https://ibaotu.com/tupian/397524378.html
https://ibaotu.com/tupian/397524363.html
https://ibaotu.com/tupian/397524347.html
https://ibaotu.com/tupian/397524332.html
https://ibaotu.com/tupian/397524316.html
https://ibaotu.com/tupian/397524302.html
https://ibaotu.com/tupian/397524287.html
https://ibaotu.com/tupian/397524272.html
https://ibaotu.com/tupian/397524254.html
https://ibaotu.com/tupian/397524239.html
https://ibaotu.com/tupian/397524225.html
https://ibaotu.com/tupian/397524211.html
https://ibaotu.com/tupian/397524194.html
https://ibaotu.com/tupian/397524179.html
https://ibaotu.com/tupian/397524165.html
https://ibaotu.com/tupian/397524148.html
https://ibaotu.com/tupian/397524134.html
https://ibaotu.com/tupian/397524117.html
https://ibaotu.com/tupian/397524102.html
https://ibaotu.com/tupian/397524086.html
https://ibaotu.com/tupian/397524071.html
https://ibaotu.com/tupian/397524054.html
https://ibaotu.com/tupian/397524038.html
https://ibaotu.com/tupian/397524023.html
https://ibaotu.com/tupian/397524008.html
https://ibaotu.com/tupian/397523993.html
https://ibaotu.com/tupian/397523980.html
https://ibaotu.com/tupian/397523964.html
https://ibaotu.com/tupian/397523948.html
https://ibaotu.com/tupian/397523934.html
https://ibaotu.com/tupian/397523918.html
https://ibaotu.com/tupian/397523903.html
https://ibaotu.com/tupian/397523887.html
https://ibaotu.com/tupian/397523871.html
https://ibaotu.com/tupian/397523857.html
https://ibaotu.com/tupian/397523843.html
https://ibaotu.com/tupian/397523827.html
https://ibaotu.com/tupian/397523810.html
https://ibaotu.com/tupian/397523794.html
https://ibaotu.com/tupian/397523779.html
https://ibaotu.com/tupian/397523764.html
https://ibaotu.com/tupian/397523750.html
https://ibaotu.com/tupian/397523732.html
https://ibaotu.com/tupian/397523716.html
https://ibaotu.com/tupian/397523701.html
https://ibaotu.com/tupian/397523685.html
https://ibaotu.com/tupian/397523672.html
https://ibaotu.com/tupian/397523653.html
https://ibaotu.com/tupian/397523638.html
https://ibaotu.com/tupian/397523623.html
https://ibaotu.com/tupian/397523608.html
https://ibaotu.com/tupian/397523591.html
https://ibaotu.com/tupian/397523574.html
https://ibaotu.com/tupian/397523559.html
https://ibaotu.com/tupian/397523544.html
https://ibaotu.com/tupian/397523529.html
https://ibaotu.com/tupian/397523514.html
https://ibaotu.com/tupian/397523497.html
https://ibaotu.com/tupian/397523481.html
https://ibaotu.com/tupian/397523466.html
https://ibaotu.com/tupian/397523451.html
https://ibaotu.com/tupian/397523437.html
https://ibaotu.com/tupian/397523417.html
https://ibaotu.com/tupian/397523400.html
https://ibaotu.com/tupian/397523383.html
https://ibaotu.com/tupian/397523369.html
https://ibaotu.com/tupian/397523353.html
https://ibaotu.com/tupian/397523338.html
https://ibaotu.com/tupian/397523324.html
https://ibaotu.com/tupian/397523306.html
https://ibaotu.com/tupian/397523293.html
https://ibaotu.com/tupian/397523279.html
https://ibaotu.com/tupian/397523264.html
https://ibaotu.com/tupian/397523249.html
https://ibaotu.com/tupian/397523236.html
https://ibaotu.com/tupian/397523217.html
https://ibaotu.com/tupian/397523204.html
https://ibaotu.com/tupian/397523188.html
https://ibaotu.com/tupian/397523172.html
https://ibaotu.com/tupian/397523160.html
https://ibaotu.com/tupian/397523143.html
https://ibaotu.com/tupian/397523123.html
https://ibaotu.com/tupian/397523110.html
https://ibaotu.com/tupian/397523095.html
https://ibaotu.com/tupian/397523080.html
https://ibaotu.com/tupian/397523066.html
https://ibaotu.com/tupian/397523047.html
https://ibaotu.com/tupian/397523034.html
https://ibaotu.com/tupian/397523019.html
https://ibaotu.com/tupian/397523006.html
https://ibaotu.com/tupian/397522989.html
https://ibaotu.com/tupian/397522972.html
https://ibaotu.com/tupian/397522957.html
https://ibaotu.com/tupian/397522942.html
https://ibaotu.com/tupian/397522928.html
https://ibaotu.com/tupian/397522911.html
https://ibaotu.com/tupian/397522895.html
https://ibaotu.com/tupian/397522878.html
https://ibaotu.com/tupian/397522864.html
https://ibaotu.com/tupian/397522846.html
https://ibaotu.com/tupian/397522831.html
https://ibaotu.com/tupian/397522813.html
https://ibaotu.com/tupian/397522798.html
https://ibaotu.com/tupian/397522783.html
https://ibaotu.com/tupian/397522767.html
https://ibaotu.com/tupian/397522752.html
https://ibaotu.com/tupian/397522737.html
https://ibaotu.com/tupian/397522722.html
https://ibaotu.com/tupian/397522704.html
https://ibaotu.com/tupian/397522686.html
https://ibaotu.com/tupian/397522669.html
https://ibaotu.com/tupian/397522653.html
https://ibaotu.com/tupian/397522637.html
https://ibaotu.com/tupian/397522623.html
https://ibaotu.com/tupian/397522608.html
https://ibaotu.com/tupian/397522594.html
https://ibaotu.com/tupian/397522577.html
https://ibaotu.com/tupian/397522562.html
https://ibaotu.com/tupian/397522547.html
https://ibaotu.com/tupian/397522526.html
https://ibaotu.com/tupian/397522511.html
https://ibaotu.com/tupian/397522496.html
https://ibaotu.com/tupian/397522480.html
https://ibaotu.com/tupian/397522466.html
https://ibaotu.com/tupian/397522450.html
https://ibaotu.com/tupian/397522436.html
https://ibaotu.com/tupian/397522420.html
https://ibaotu.com/tupian/397522404.html
https://ibaotu.com/tupian/397522388.html
https://ibaotu.com/tupian/397522374.html
https://ibaotu.com/tupian/397522356.html
https://ibaotu.com/tupian/397522340.html
https://ibaotu.com/tupian/397522323.html
https://ibaotu.com/tupian/397522308.html
https://ibaotu.com/tupian/397522292.html
https://ibaotu.com/tupian/397522277.html
https://ibaotu.com/tupian/397522263.html
https://ibaotu.com/tupian/397522248.html
https://ibaotu.com/tupian/397522234.html
https://ibaotu.com/tupian/397522216.html
https://ibaotu.com/tupian/397522200.html
https://ibaotu.com/tupian/397522187.html
https://ibaotu.com/tupian/397522171.html
https://ibaotu.com/tupian/397522153.html
https://ibaotu.com/tupian/397522137.html
https://ibaotu.com/tupian/397522120.html
https://ibaotu.com/tupian/397522106.html
https://ibaotu.com/tupian/397522092.html
https://ibaotu.com/tupian/397522077.html
https://ibaotu.com/tupian/397522061.html
https://ibaotu.com/tupian/397522043.html
https://ibaotu.com/tupian/397522028.html
https://ibaotu.com/tupian/397522014.html
https://ibaotu.com/tupian/397522000.html
https://ibaotu.com/tupian/397521982.html
https://ibaotu.com/tupian/397521966.html
https://ibaotu.com/tupian/397521953.html
https://ibaotu.com/tupian/397521938.html
https://ibaotu.com/tupian/397521922.html
https://ibaotu.com/tupian/397521908.html
https://ibaotu.com/tupian/397521892.html
https://ibaotu.com/tupian/397521878.html
https://ibaotu.com/tupian/397521859.html
https://ibaotu.com/tupian/397521844.html
https://ibaotu.com/tupian/397521827.html
https://ibaotu.com/tupian/397521812.html
https://ibaotu.com/tupian/397521796.html
https://ibaotu.com/tupian/397521782.html
https://ibaotu.com/tupian/397521764.html
https://ibaotu.com/tupian/397521749.html
https://ibaotu.com/tupian/397521734.html
https://ibaotu.com/tupian/397521719.html
https://ibaotu.com/tupian/397521703.html
https://ibaotu.com/tupian/397521689.html
https://ibaotu.com/tupian/397521672.html
https://ibaotu.com/tupian/397521656.html
https://ibaotu.com/tupian/397521640.html
https://ibaotu.com/tupian/397521625.html
https://ibaotu.com/tupian/397521609.html
https://ibaotu.com/tupian/397521594.html
https://ibaotu.com/tupian/397521581.html
https://ibaotu.com/tupian/397521566.html
每个用户都有一个用户组，系统可以对一个用户组中的所有用户进行集中管理。不同Linux 系统对用户组的规定有所不同，如Linux下的用户属于与它同名的用户组，这个用户组在创建用户时同时创建。
用户组的管理涉及用户组的添加、删除和修改。组的增加、删除和修改实际上就是对/etc/group文件的更新。
1、增加一个新的用户组使用groupadd命令。其格式如下：
groupadd 选项 用户组
可以使用的选项有：
- -g GID 指定新用户组的组标识号（GID）。
- -o 一般与-g选项同时使用，表示新用户组的GID可以与系统已有用户组的GID相同。
实例1：
# groupadd group1
此命令向系统中增加了一个新组group1，新组的组标识号是在当前已有的最大组标识号的基础上加1。
实例2：
# groupadd -g 101 group2
此命令向系统中增加了一个新组group2，同时指定新组的组标识号是101。
2、如果要删除一个已有的用户组，使用groupdel命令，其格式如下：
groupdel 用户组
例如：
# groupdel group1
此命令从系统中删除组group1。
3、修改用户组的属性使用groupmod命令。其语法如下：
groupmod 选项 用户组
常用的选项有：
