NoCache

If you encounter an error like bash: ./script.sh: Permission denied when executing bash (shell) script, meaning the script file itself is not permitted to execute. And make no difference even if you run it with sudo. To fix this, we'll be using chmod command on Linux to modify the permissions.

Default file permissions on Linux is 777, which means everyone can read, write and execute the file. It's fine for most of the scenario, but it's another story when comes to SSH private key. If you try to establish a SSH connection with a too open private key, WARNING: UNPROTECTED PRIVATE KEY FILE! will be shown.