I did sudo chmod -R 700 /usr, is there anything I can do?
3760
What if I accidentally run command "chmod -R" on system directories (/, /etc, ...)
149832
How can I revert a chmod on the etc directory?
60463
Editing sudoers file to restrict a user's commands
108721
Always get Error: Operation not supported for: find /Path/ -type f -exec chmod 755 {} \;
7317
how to: Please sudo, do _not_ setup any environment, especially $SUDO_USER?
142297
What are the consequences of running chmod 755 -R on home directory?
71830
How to fix "sudo: unable to open ... Read-only file system"?
9981
How do I get permissions to edit system configuration files?
7146
How to recover from a chmod -R 000 /bin?
54429
Why can't I sudo some commands? (e.g., vim)
56465
Got not sufficient privileges message in CMD when logged on as administrator
140231
How to get back sudo on Ubuntu?
20211
Strange behaviour of 'sudo chmod -rwx': Does not remove group write permissions
787
Why is "chmod -R 777 /" destructive?
106931
How to undo sudo add-apt-repository?
66986
Losing permissions by adding capability?
188
What should I check after an unauthorized access?