U n i x - B a s i c C o m m a n d
| ls | To Display List of Working Directory. |
| pwd | To Display Working Directory. |
| cat | To Display The Contents of A File. |
| rm | To Remove A File. |
| cp | To Copy A File.
e.g: cp source_file destination_file |
| mv | To Change Name of A File.
e.g: cp existing_file new_file |
| who or w | To Display A List Of The Users Currently Logged In. |
| who am i | To Display Which Terminal You Are Using and What Time You Logged In. |
| finger | To Display A List Of The Users Who Are Currently Using The System. |
| talk | To Carry On A Two-Way Conversation With Another User Who Is Logged In Your System or On A Different Computer. |
| w or uptime | To Display Current Time Of Day, How Long The Computer Has Been Running (days, hours, minutes), How Many Users Are Logged In and How busy The System Is (load average). |
| write | To Send A Message To Another User Who Is Logged In. |
| mailx | To Send and Receive Electronic Mail. |
| echo | To Display Text On The Terminal. |
| date | To Display The Date and Time. |
| grep | To Find A String. |
| head or sed | To Look At The Top of The File ( first 10 lines ). |
| tail | To Look At The End of The File ( last 10 lines ). |
| sort | To Display A file In Order. |
| uniq | To Remove Duplicate Lines In A File |
| lp | To Print A File. |
| wheris or which | To Find Command's Full Pathname Associated With. |
| diff | To Compare Two Files. |
| compress | To Shrink A File. |
| uncompress | To Unshrink A Compressed File. |
| zcat | To Display The Contents of Compressed File. |
| passwd | To Change User's Password. |
| pg or more | To Display one Screenful Contents of A Text File At A Time.
e.g: cat text_file | pg or cat text_file | more |
| man | To Display The System Manual.
e.g: man man or man man | pg To Find Out More About man Utility e.g: man -k To Search Using Keywords man Utility |