1. cd- It stands for change directory.
Usage: if you are at some directory on terminal and want to move to another
directory then use cd pathname/path.
2. sudo -super user do. Means if the permission of a file is given to owner the others can access by using sudo.
3. locate- it is used to search for a file.
4. tail- it is used to print last 10 lines of each files to standard output.
5. cp – copy paste
6. grep -r “filename” – Search for the selected word in whole document.