文件属性 chattr
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文件权限管理之： 文件属性
注：设置文件属性(权限)，针对所有用户，包括root
[root@localhost ~]# touch file100 file200 file300
[root@localhost ~]# lsattr file100 file200 file300
-------------e- file100
-------------e- file200
-------------e- file300
[root@localhost ~]# man chattr
[root@localhost ~]# chattr +a file100
[root@localhost ~]# chattr +i file200
[root@localhost ~]# chattr +A file300
[root@localhost ~]# lsattr file100 file200 file300
-----a-------e- file100
----i--------e- file200
-------A-----e- file300
[root@localhost ~]# echo 111 > file100 //以覆盖的方式写入
bash: file100: Operation not permitted
[root@localhost ~]# rm -rf file100
rm: cannot remove `file100': Operation not permitted
[root@localhost ~]# echo 111 >> file100 //以追加的方式写入，例如日志文件
[root@localhost ~]# echo 111 > file200
bash: file200: Permission denied
[root@instructor ~]# echo 111 >> file200
bash: file200: Permission denied
[root@localhost ~]# rm -rf file200
rm: cannot remove `file200': Operation not permitted
[root@localhost ~]# chattr -a file100
[root@localhost ~]# chattr -i file200
[root@localhost ~]# chattr -A file300