- Top command is very useful tool to see the system performance statistics like processes, memory, swap, load average etc.
- Here we have covered all the aspects of the top command.
Examples:
1. “top” command for one iteration
| $ top -n 1 |
2. kill process without exiting “top”
| $ top –> then press k –> then enter PID |
3. To renice a process
| $ top –> then press r |
4. “top” for specific user
| $ top -u santosh |
5. “top” for specific process
| $ top -p PID,PID… |
6. To display the CPU’s
| $ top –> then press 1 |
7. Refreshing output of “top”
| $ top –> then press “spacebar” |
(To change the output update frequency, press d in interactive mode, and enter the time in seconds as shown below.)
8. Highlight Running Processes in the Linux Top Command Output
| $ top –> then press z/b |
9. Display Absolute Path of the Command and its Arguments
| $ top –> then press c |
10. Executing Unix Top Command in Batch Mode
| $ top -b -n 1 |
(Useful when you want to capture the output in txt format)
11. Split Top Output into Multiple Panels
| $ top –> then press A |
12. Toggle Top Header to Increase Number of Processes Displayed
| $ top then –> Press l – to hide / show the load average. 1st header line. –> Press t – to hide / show the CPU states. 2nd and 3rd header line. –> Press m – to hide / show the memory information. 4th and 5th line. |
13. To save top command configuration changes
| $ top –> then press W |
