| date | Displays the current date and time of the system |
| cal | Displays the current month’s calendar |
| uptime | shows the uptime of the system |
| whoami | current user’s name |
| users | logged in user name |
| id | current user’s id |
| who | |
| w | |
| man | reference manual of other commands |
| ls | Lists Directory |
| cat | View whole File at once |
| more | View File page by page |
| less | View File page by page (Loads faster than more) |
| head | Display first 10 lines of a file |
| tail | Display last 10 lines of a file |
| wc -l | Count number of lines in a file |
About the author
Gokul Deepak is a DevOps engineer focused on building reliable cloud systems through automation, observability, and disciplined infrastructure design. He shares practical insights from real-world production environments, helping engineers build systems that scale with clarity and confidence.