Resources Review

Commands

• ps: running processes
• top: running processes
• fallocate: allocate a file of certain size
• kill: kills by id
• killall: kills by name
• fg: puts bg process in the foreground
• bg: backgrounds a process
• jobs: lists background processes attached to terminal that are running.
• &: backgrounds the process
• Control + z, pauses fg process (attatched to term)
• Control + c, kills fg process(attatched to term)
• free : shows ram stats

Topics

• cron: schedule tasks to run
  • * * * * * /bin/echo #evvery minute
  • 0 * * * * /bin/echo #top of the hour
  • 0 3 * * * /bin/echo #3 am
  • 0 3 1 * * /bin/echo #3 am first of month
  • 0 3 * * 1 /bin/echo #3 am monday
  • 0,4,7 3,8,12,16 * * 1 /bin/echo #3:00, 3:04, 3:07, 8:00, 8:04 am monday
• Parent process,grandparent process
• Swap space: when ram is full, put it here. (partition)