一、要求:

手动添加用户user1, 设置其基本组为user1 (5000),附加组为othergroup,最后添加密码


二、操作过程:

1、创建用户组othergroup

[root@localhost home]# groupadd othergroup


2、添加用户组user1

[root@localhost home]# echo 'user1:x:5000' >> /etc/group


3、编辑/etc/group,修改用户组user1附加组为othergroup

[root@localhost home]# nano /etc/group

已修改记录为“othergroup:x:5001:user1


4、验证/etc/group修改结果

[root@localhost home]# tail /etc/group
avahi-autoipd:x:101:
gdm:x:42:
sabayon:x:86:
distro:x:3003:mandriva
linux:x:3004:
fedora:x:2003:mandriva
hbase:x:102:
openstack:x:4005:
othergroup:x:5001:user1
user1:x:5000


5、向/etc/passwd中添加记录

[root@localhost home]# echo 'user1:x:5000:5000:User1:/home/user1:/bin/bash' >> /etc/passwd


6、验证/etc/passwd修改结果

[root@localhost home]# tail -1 /etc/passwd
user1:x:5000:5000:User1:/home/user1:/bin/bash


7、向/etc/shadow中添加记录

[root@localhost home]# echo 'user1:!!:15995:0:99999:7:::' >> /etc/shadow


8、验证/etc/shadow修改结果

[root@localhost home]# tail -1 /etc/shadow
user1:!!:15995:0:99999:7:::


9、创建用户user1家目录,并修改其权限 (参考练习1

[root@localhost home]# cp -r /etc/skel/ /home/user1
[root@localhost home]# chown -R user1.user1 /home/user1
[root@localhost home]# chmod -R go= /home/user1
[root@localhost home]# ls -al /home/user1
total 56
drwx------ 3 user1 user1 4096 Oct 17 15:25 .
drwxr-xr-x 6 root  root  4096 Oct 17 15:25 ..
-rw------- 1 user1 user1   33 Oct 17 15:25 .bash_logout
-rw------- 1 user1 user1  176 Oct 17 15:25 .bash_profile
-rw------- 1 user1 user1  124 Oct 17 15:25 .bashrc
-rw------- 1 user1 user1  515 Oct 17 15:25 .emacs
drwx------ 4 user1 user1 4096 Oct 17 15:25 .mozilla
[root@localhost home]# ls -dl /home/user1
drwx------ 3 user1 user1 4096 Oct 17 15:25 /home/user1


10、生成MD5加密密码,密码为"redhat"

[root@localhost ~]# openssl passwd -1 -salt '12345678'
Password:
$1$12345678$0ME5N6oDyoEAwUp7b5UDM/


11、编辑/etc/shadow,将生成的密码添加进记录中,替换第二个字段'!!'

[root@localhost home]# nano /etc/shadow


12、使用user1用户登陆系统,能正常登陆即表示添加用户操作成功。