Linux 用戶，組，權限小練習

1.新建一個沒有家目錄的用戶openstack

2.複製/etc/skel爲/home/openstack

3.改變/home/openstack及其內部的文件的屬主，屬組均爲openstack

4./home/openstack及其內部的文件，屬組和其餘用戶沒有任何訪問權限

[root@localhost ~]# useradd -M openstack [root@localhost ~]# ls -l /home/openstack ls: /home/openstack: No such file or directory [root@localhost ~]# tail -1 /etc/passwd openstack:x:4005:4005::/home/openstack:/bin/bash [root@localhost ~]# id openstack uid=4005(openstack) gid=4005(openstack) groups=4005(openstack) context=root:system_r:unconfined_t:SystemLow-SystemHigh [root@localhost ~]# finger openstack Login: openstack Name: (null) Directory: /home/openstack Shell: /bin/bash Never logged in. No mail. No Plan. [root@localhost ~]# cp -rv /etc/skel /home/openstack `/etc/skel' -> `/home/openstack' `/etc/skel/.bashrc' -> `/home/openstack/.bashrc' `/etc/skel/.bash_logout' -> `/home/openstack/.bash_logout' `/etc/skel/.bash_profile' -> `/home/openstack/.bash_profile' [root@localhost ~]# ls -la /home/openstack total 40 drwxr-xr-x 2 root root 4096 May 16 16:14 . drwxr-xr-x 28 root root 4096 May 16 16:14 .. -rw-r--r-- 1 root root 24 May 16 16:14 .bash_logout -rw-r--r-- 1 root root 176 May 16 16:14 .bash_profile -rw-r--r-- 1 root root 124 May 16 16:14 .bashrc [root@localhost ~]# cd /home/openstack [root@localhost openstack]# ls -la total 40 drwxr-xr-x 2 root root 4096 May 16 16:14 . drwxr-xr-x 28 root root 4096 May 16 16:14 .. -rw-r--r-- 1 root root 24 May 16 16:14 .bash_logout -rw-r--r-- 1 root root 176 May 16 16:14 .bash_profile -rw-r--r-- 1 root root 124 May 16 16:14 .bashrc [root@localhost openstack]# chown -R openstack:openstack . [root@localhost openstack]# ls -la total 40 drwxr-xr-x 2 openstack openstack 4096 May 16 16:14 . drwxr-xr-x 28 root root 4096 May 16 16:14 .. -rw-r--r-- 1 openstack openstack 24 May 16 16:14 .bash_logout -rw-r--r-- 1 openstack openstack 176 May 16 16:14 .bash_profile -rw-r--r-- 1 openstack openstack 124 May 16 16:14 .bashrc [root@localhost openstack]# chmod go= . [root@localhost openstack]# ls -la total 40 drwx------ 2 openstack openstack 4096 May 16 16:14 . drwxr-xr-x 28 root root 4096 May 16 16:14 .. -rw-r--r-- 1 openstack openstack 24 May 16 16:14 .bash_logout -rw-r--r-- 1 openstack openstack 176 May 16 16:14 .bash_profile -rw-r--r-- 1 openstack openstack 124 May 16 16:14 .bashrc [root@localhost openstack]# chmod -R go= . [root@localhost openstack]# ls -la total 40 drwx------ 2 openstack openstack 4096 May 16 16:14 . drwxr-xr-x 28 root root 4096 May 16 16:14 .. -rw------- 1 openstack openstack 24 May 16 16:14 .bash_logout -rw------- 1 openstack openstack 176 May 16 16:14 .bash_profile -rw------- 1 openstack openstack 124 May 16 16:14 .bashrc [root@localhost openstack]#

結果：

[root@localhost openstack]# su - openstack [openstack@localhost ~]$ id uid=4005(openstack) gid=4005(openstack) groups=4005(openstack) context=root:system_r:unconfined_t:SystemLow-SystemHigh

其實上面的過程也揭示了用戶建立的過程。

（每個命令執行完畢後，都應該想辦法去驗證它！）