3.文件管理
本章同步視頻:https://edu.51cto.com/sd/e4874
3.3.2 隱藏權限
-rw-r--r--. 1 root root 6 Mar 13 21:33 aaa
[root@localhost tmp]# echo "bbbb">aaa
-bash: aaa: Operation not permitted
#注:文件的擁有者且爲root,明明具有寫權限,卻不能向aaa中寫入數據。
[root@localhost tmp]# lsattr aaa
[root@localhost tmp]# chattr +a aaa
[root@localhost tmp]# echo "bbbb">aaa
-bash: aaa: Operation not permitted #寫入失敗
[root@localhost tmp]# echo "bbbb">>aaa #追加內容成功
[root@localhost tmp]# chattr -a aaa
[root@localhost tmp]# echo "bbbb">aaa
[root@localhost tmp]# chattr =i aaa
[root@localhost tmp]# echo "cccc">aaa
[root@localhost tmp]# echo "cccc">>aaa
[root@localhost tmp]# rm -f aaa
rm: cannot remove ‘aaa’: Operation not permitted