Basic Monitoring Tools

Key Goals

• Monitor our system performance

Content

• The procps-ng package:

  • free
  • df
  • top
  • vmstat
  • pgrep
  • pkill
  • pmap
  • ps
  • skill
  • slabtop
  • tload
  • uptime
  • vmstat
  • w & who
  • watch

Exercises

1. Use the rpm tool to list all the tools that the procps-ng package installs (at /usr/bin).
2. List the available RAM in GB.
3. List the file system usage.
4. List all the pids of the sshd daemon.
5. Explain the ‘pmap $$’ output.
6. Which command enables you to view the number of cpus on your machine?
7. Run: uptime, explain the 3 seaction of the load avarage.
8. If i got 4 cpus on the machine and the load_avarage equals to 0.1, 2.5, 5.8, am i queuing cpu requests?
9. Run: cat /proc/uptime, exaplain what each column represents.
10. Using watch run uptime and refresh the output every 3 seconds.

11. Scenario:

    1. Use a virtual machine with 1 cpu.
    2. Run tload
    3. On a new shell, start compressing all the content of /usr/share/doc using bzip.
    4. When the cpu starts queuing tasks?