Linux commands to check performance

  1. vmstat
  2. ps -aux
  3. netcat
  4. df
  5. netstat
  6. mstat, traceroute, ping
  7. telnet to port to test remote server have port open
  8. multiple binaries in /proc/ like /prod/cpuinfo
  9. journctl -f
  10. /var/log/syslog
  11. tail, head, less, grep , sed and awk to filter logs

https://superuser.com/questions/117913/ps-aux-output-meaning