Linux commands to check performance
- vmstat
- ps -aux
- netcat
- df
- netstat
- mstat, traceroute, ping
- telnet to port to test remote server have port open
- multiple binaries in /proc/ like /prod/cpuinfo
- journctl -f
- /var/log/syslog
- tail, head, less, grep , sed and awk to filter logs
https://superuser.com/questions/117913/ps-aux-output-meaning