Top 10 Linux Basic Commands that everyone must know who wants to start their career as a Linux Administrator. 1. whoami it tells you current user 2. pwd (present/print working directory) It tells you current working directory 3. cd ( change directory) it take you your last working directory most likely your current user home directory 4. cd .. It will take you one step back directory 5. cd../.. it will take you two steps back in directory 6. ls (list files/directory) It lists the files in directories in a file & directory 7. ls -l (long list) It lists the files and directories in long list means the metadata. (metadata we will discuss in next chapters) 8. ls -la ( list hidden files and directories It lists the hidden and unhidden files 9. ls -lR (list recursive subdirectories) It lists the recursively directories means choose any directories it lists the subdirectoies of that directory if it has anu subdirectories and file. 10.ls -ld (list data of file/directory)...