Unix system provides a form of security for users, files, and directories.
With some shell permission commands, you can display user identity, change file's mode, set default file permission, change file owner, and even group owners.
Basic shell per...
![CheatSheet for [VI/VIM] Necessary Commands](https://cdn.hashnode.com/res/hashnode/image/upload/v1685906285655/55a1e6a5-1657-4fa7-bab2-955917fb9c57.jpeg)
