How to deal with the prompt "Operation not permitted" when deleting files in Linux

Colleagues often ask, when deleting files/directories, an Operation not permitted error is reported. How to deal with this? !

This is usually a permissions issue, such as:

1. If you are a normal user with sufficient permissions, the folder may be used by other services/processes.

lsof +D /Dir/Your/Want/To/Delete/

First execute the above command to query the process IDs that call the folder, and then kill it. At this time, it should be possible to delete it!

2. If you are a normal user and lack permissions, you need to use the su or sudo command to delete the folder

3. If you are the root user and still get the above error, the file is likely locked

[root@linux ~]# lsattr YourFile
  ---i---------- YourFile

You need to use the lsattr command to check whether the system has added i, attributes, such as above. This parameter makes a file "cannot be deleted, renamed, set links, or have data written or added! It is of great help to system security! This command is also the reason why you cannot perform the deletion operation even if you are the root user. Then use the chattr command to remove the attribute

[root@linux ~]# chattr -i YourFile
[root@linux ~]# lsattr YourFile
[root@linux ~]#

Then you can delete the file!

Note: The i attribute of the chattr command is not suitable for all directories. The chattr command cannot protect the /, /dev, /tmp, and /var directories. Think about it: for example, in the /tmp directory, all users can create and delete their own temporary files, and the same is true for the root user. What will happen if even the root user cannot delete the files in this directory?

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