System and Process Management

System Management

Check Memory

• free -m

Check CPU

• top

• mpstat -P ALL: Check cpu usage

• lscpu | grep '^CPU(s):': check number of CPU cores

• nproc: check number of CPU cores

• grep -c ^processor /proc/cpuinfo: check number of CPU cores

Process Management

Backgrounding a Process

• Add & to the end of command

• Running command without & and use bg command to send it to background

List Jobs and Bring process to foreground

• jobs: list all current running jobs in current session

• fg [%|]: bring process to foreground

  • %+: current job

  • %-: previous job

Process Control

• ps: see process status, system wide, not of current session like jobs

  • -e: all process

  • -f: full format listing

  • -C : select command name

• kill : kill process