| 1 | uptime | Shows how long system is on and running |
| 2 | users | Shows users – current logged in |
| 3 | free -m/g | shows storage details in m:mb , g:gb |
| 4 | last | Last users activity |
| 5 | history | Command history |
| 6 | ping | Checking the ping |
| 7 | ifconfig | Network information |
| 8 | traceroute <domain> | Tracing the domain server path |
| 9 | nslookup | Finding the server ip |
| 10 | wget | To download via link |
| 11 | ps | List the process of current user |
| 12 | top | Processor activity of entire system including root activities |
| 13 | last | Last user activity |
| 14 | kill | To kill the process |
| 15 | jobs | To see running jobs , ex : starting sleep job : sleep 1000 & , & id run in bg |