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How do I get rid of chmod?
There’s no way of “undoing” a chmod,sshort of going through a known-good installation and checking/reproducing permissions. The easiest way out for you is a complete re-install.
What does RWXR XR — mean in octal?
Therefore rwx = 4 + 2 + 1 = 7. Therefore the octal character 7 represents that the user has the permissions to read write and execute the file. Let us take another example. The group permissions in the above case is r-x. Now we want to change the permissions for this file to say, rw–r-xr–.
What is the default chmod?
As you might remember, the default file permission value is 0644, and the default directory’s is 0755.
What does chmod command do for a directory?
For a directory, the permissions govern who can cd into the directory and who can create, or modify files within the directory. You use the chmod command to set each of these permissions. To see what permissions have been set on a file or directory, we can use ls. Viewing and Understanding File Permissions
How to remove the write permission in chmod?
Repulsively remove the write permission for other users: chmod -R o-w dirname Remove the read, write, and execute permission for all users except the file’s owner:
Is there any way to prevent deletion of certain files from user owned?
Currently if user owns the directory which contain any file. He can delete. If there is no generic way for all *nix, it’s a Linux and ext4 FS. (I dislike intruding users’ home, I think they should be allowed to do whatever they want to do with they homes… but anyway…) This should work on linux (at least).
What happens if I delete a file directory?
Deleting a file/directory changes the contents of the parent directory, hence, if you don’t want MainFolder to be deleted, you want to ensure that the intended user does not have write access to the parent dir of MainFolder.