创建用户gentoo，附加组为bin和root，默认shell为/bin/csh，注释信息为“Gentoo Distribution”
[root@localhost wang]# useradd -G bin,root -s /bin/csh -c "Gentoo distribution" gentoo [root@localhost wang]# getent passwd gentoo gentoo:x:2004:2004:Gentoo distribution:/home/gentoo:/bin/csh
创建下面的用户、组和组成员关系
名字为admins的组
用户natasha，使用admins 作为附属组
用户harry，也使用admins作为附属组
用户sarah，不可交互登录系统，且不是admins的成员
natasha，harry,sarah密码都是centos
[root@localhost wang]# groupadd admins [root@localhost wang]# useradd -G admins natasha [root@localhost wang]# useradd -G admins harry [root@localhost wang]# useradd -s /sbin/nologin sarah [root@localhost wang]# echo "centos" | passwd --stdin natasha Changing password for user natasha. passwd: all authentication tokens updated successfully. [root@localhost wang]# echo "centos" | passwd --stdin harry Changing password for user harry. passwd: all authentication tokens updated successfully. [root@localhost wang]# echo "centos" | passwd --stdin sarah Changing password for user sarah. passwd: all authentication tokens updated successfully. [root@localhost wang]#
一次创建多个用户并配置密码
[root@localhost ~]# vi user.txt linux1:x:2001:2001::/home/linux1:/bin/bash linux2:x:2002:2002::/home/linux2:/bin/bash linux3:x:2003:2003::/home/linux3:/bin/bash ~ ~ ~ [root@localhost ~]# newusers user.txt [root@localhost ~]# ls /home gentoo harry linux1 linux2 linux3 mageedu natasha sarah [root@localhost ~]# cat /etc/passwd ... ... ... linux1:x:2001:2001::/home/linux1:/bin/bash linux2:x:2002:2002::/home/linux2:/bin/bash linux3:x:2003:2003::/home/linux3:/bin/bash
[root@localhost ~]# vi passwd.txt linxu1:123456 linux2:234567 linux3:345678 ~ ~ ~ ~ [root@localhost ~]# cat passwd.txt | chpasswd [root@localhost ~]# cp /etc/skel/.[^.]* /home/linux1
创建testuser uid：1234 主组：bin 辅助组：root,ftp shell:/bin/csh home:/testdir/testuser
[root@localhost /]# useradd -u 1234 -g bin -G root,ftp -s /bin/csh -d /testdir/testuser -m testuser [root@localhost /]# id testuser uid=1234(testuser) gid=1(bin) groups=1(bin),0(root),50(ftp) [root@localhost /]# groups testuser testuser : bin root ftp
修改testuser uid:4321 主组：root 辅助组：nobody loginname：test home:/home/test 家数据迁移
[root@localhost /]# usermod -u 4321 -g root -G nobody -l test -d /home/test -m testuser [root@localhost /]# id test uid=4321(test) gid=0(root) groups=0(root),99(nobody) [root@localhost /]# groups test test : root nobody
批量创建帐号 user1-user10 uid：3000-3009 shell:/bin/csh home:testdir/user 密码：user1pass
[root@localhost /]# vi user.txt user1:x:3000:3000::/testdir/user1:/bin/csh user2:x:3001:3001::/testdir/user2:/bin/csh user3:x:3002:3002::/testdir/user3:/bin/csh user4:x:3003:3003::/testdir/user4:/bin/csh user5:x:3004:3004::/testdir/user5:/bin/csh user6:x:3005:3005::/testdir/user6:/bin/csh user7:x:3006:3006::/testdir/user7:/bin/csh user8:x:3007:3007::/testdir/user8:/bin/csh user9:x:3008:3008::/testdir/user9:/bin/csh user10:x:3009:3009::/testdir/user10:/bin/csh ~ ~ [root@localhost /]# newusers user.txt [root@localhost /]# vi passwd.txt user1:user1pass user2:user2pass user3:user3pass user4:user4pass user5:user5pass user6:user6pass user7:user7pass user8:user8pass user9:user9pass user10:user10pass ~ ~ [root@localhost /]# cat passwd.txt | chpasswd [root@localhost ~]# cp /etc/skel/.[^.]* /testdir/user1 cp: omitting directory ‘/etc/skel/.mozilla’ [root@localhost ~]# su - user1 [user1@localhost ~]$ exit logout [root@localhost ~]#
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