Linux 常用命令十五 用户和组操作命令

一、创建一个用户

wang@wang:~/workpalce/threading$ sudo useradd -m python    # -m创建家目录
wang@wang:~/workpalce/threading$ ls ~/..
python  wang

wang@wang:~/workpalce/threading$ cat /etc/passwd
python:x:1001:1001::/home/python:

wang@wang:~/workpalce/threading$ cat /etc/group
python:x:1001:

二、给账户添加密码

wang@wang:~/workpalce/threading$ sudo passwd python
输入新的 UNIX 密码： 
重新输入新的 UNIX 密码： 
passwd：已成功更新密码

wang@wang:~/workpalce/threading$ sudo cat /etc/shadow
python:$6$4XBAyRRm$Xioo/N5W8JYAyvt1LmJ36LryvXU8N0iApxhyStLlN3bN.ca.Mh0DKKkiagdRXbW0OTHKKVIqbU2CbR71OTq0l.:17519:0:99999:7:::

三、创建组

wang@wang:~/workpalce/threading$ sudo groupadd proc
wang@wang:~/workpalce/threading$ cat /etc/group
proc:x:1002:

四、切换账户

wang@wang:~/workpalce/threading$ su python
密码： 
python@wang:/home/wang/workpalce/threading$ 

python@wang:/home/wang/workpalce/threading$ groups
python

五、给账户改组

wang@wang:~/workpalce/threading$ sudo usermod -g proc python
wang@wang:~/workpalce/threading$ su python
密码： 
python@wang:/home/wang/workpalce/threading$ groups
proc

wang@wang:~/workpalce/threading$ sudo usermod -G python python   # 追加
wang@wang:~/workpalce/threading$ su python
密码： 
python@wang:/home/wang/workpalce/threading$ groups
proc python

六、使自己创建的用户拥有sudo执行命令的权限

wang@wang:~/workpalce/threading$ sudo usermod -G sudo python 
wang@wang:~/workpalce/threading$ su python
密码： 
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.
python@wang:/home/wang/workpalce/threading$ sudo cat /etc/passwd
[sudo] python 的密码： 
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin

七、删除账户

wang@wang:~/workpalce/threading$ sudo userdel -r python
userdel：组“python”没有移除，因为它不是用户 python 的主组
userdel: python 邮件池 (/var/mail/python) 未找到
wang@wang:~/workpalce/threading$ ls ~/..
wang

八、删除组

wang@wang:~/workpalce/threading$ sudo groupdel python
wang@wang:~/workpalce/threading$ sudo groupdel proc