chgrp 改變所屬用戶組

要被改變的組名必須要在/etc/group文件內存在才行；

chgrp [-R] dirname/filename

-R:進行遞歸的持續更改，連同子目錄下的所有文件、目錄都更新為新的用戶組

chown 改變文件所有者

如果要連目錄下的的所有子目錄或文件 都同時更改文件所有者的話，直接加上-R參數即可

chown [-R] 賬號名稱 文件或目錄

chown [-R] 賬號名稱：組名 文件或目錄

chown [-R] 賬號名稱.組名 文件或目錄

chmod 改變權限

數字類型改變文件權限

[[email protected] tmp]# ll
total 4
drwxr-xr-x. 2 root root 4096 Aug 22 06:11 foo
[[email protected] tmp]# chmod 000  foo/
[[email protected] tmp]# ls
foo
[[email protected] tmp]# ll
total 4
d---------. 2 root root 4096 Aug 22 06:11 foo
[[email protected] tmp]# chmod
 
 777 foo/
[[email protected] tmp]# ll
total 4
drwxrwxrwx. 2 root root 4096 Aug 22 06:11 foo
[[email protected] tmp]# chmod 641 foo/
[[email protected] tmp]# ls
foo
[[email protected] tmp]# ll
total 4
drw-r----x. 2 root root 4096 Aug 22 06:11 foo
[[email protected] tmp]# 
 
chmod 755 foo/
[[email protected] tmp]# ll
total 4
drwxr-xr-x. 2 root root 4096 Aug 22 06:11 foo
[[email protected] tmp]# 

符號類型改變文件權限

[[email protected] tmp]# chmod  u=rwx,g=rw,o=rw  /tmp/foo/
[[email protected] tmp]# ll
total 4
drwxrw-rw-. 2 root root 4096 Aug 22 06:11 foo
[[email protected] tmp]# chmod  u=rx,g+x,o-rw  /tmp/foo/
[[email protected] tmp]# ll
total 4
dr-xrwx---. 2 root root 4096 Aug 22 06:11 foo
[[email protected] tmp]# chmod  ugo=rw  /tmp/foo/
[[email protected] tmp]# l
-bash: l: command not found
[[email protected] tmp]# ll
total 4
drw-rw-rw-. 2 root root 4096 Aug 22 06:11 foo
[[email protected] tmp]# chmod  ug=rw,o-rw  /tmp/foo/
[[email protected] tmp]# ll
total 4
drw-rw----. 2 root root 4096 Aug 22 06:11 foo
[[email protected] tmp]# 

linux基礎命令-chgrp/chown/chomd