linux 中设置root用户无法删除的文件

 

001、

[liujiaxin02@PC1 ~]$ ls
a.txt
[liujiaxin02@PC1 ~]$ pwd
/home/liujiaxin02
[liujiaxin02@PC1 ~]$ lsattr a.txt            ## 查看文件特殊权限
---------------- a.txt
[liujiaxin02@PC1 ~]$ sudo chattr +i a.txt     ## 给文件权限增加i
[sudo] password for liujiaxin02:
[liujiaxin02@PC1 ~]$ lsattr a.txt        ## 查看
----i----------- a.txt
[liujiaxin02@PC1 ~]$ su - root          ## 切换至root
Password:
Last login: Thu Feb  9 17:29:46 CST 2023 on pts/1
-bash: unalias: rm: not found
-bash: unalias: mv: not found
-bash: unalias: cp: not found
[root@PC1 ~]# cd /home/liujiaxin02
[root@PC1 liujiaxin02]# pwd
/home/liujiaxin02
[root@PC1 liujiaxin02]# lsattr a.txt
----i----------- a.txt
[root@PC1 liujiaxin02]# rm a.txt       ## 删除测试
rm: cannot remove ‘a.txt’: Operation not permitted