how to fix "sudo: unable to execute /bin/ls: Permission denied"?
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If we want to display files in another user from one user then 'ls' won't work.
All Files in /proc/ won't display using ls.
If you are not able to view a file using ls, it means you do not have permission for that file. ls is a very basic command open for all user unless you are manually changing the file permission of /bin/ls
PTrenholme, TobiSGD, guys!! I gave him the suggestion to check if the problem exist over all.
Thats why i said "report if any problem" if it doesn't i would have suggested to change the sudoers setting so that only he gets the access control.
I didn't say that's the final answer. Usually, once adding the local user name to sudoers list doesn't give problems.
I don't know why he was having one. That's why!!.