Managing processes

Managing processes

1. kill

   • -l list signals
   • terminate processes
   • only argument PID
   • send signals
   • 15 standard signal SIGTERM
   • 9 SIGKILL

2. ps

   • Information
     • vsz
     • % CPU
     • PID
     • TTY
     • TIME
     • CMD
     • RSS
     • STAT
   • COLUMNS -efl
     • NI priority
     • SZ size
   • Options
     • -a users
     • -u detailed
     • -x add daemons
     • -e every running
     • -f fewer than -e
   • State codes
     • D uninterrumtable
     • N low
     • R runnable
     • S sleep
     • T traced
     • Z defunct

3. SHELL

   • pipe less
     • forward space bar
     • background b key
   • ctrl + z
   • pipe grep

4. pstree

   • detailed info
     • relationship
     • lines
   • tree diagram
   • inverted tree
   • easier view
   • Options
     • -p PID
       • no compaction
       • Identical
     • -c only compaction
     • -n sort alphabetic
     • -h highlights
     • -a process by user
     • -u owner
     • -l no truncation
   • Arguments
     • PID
     • main stem
       • root
     • user name

5. killall

   • Options
     • -i confirmation
     • -e exact match
     • -v verbose
     • -g process group
     • -l list names
     • -q no feedback
     • -V version
     • -w wait
   • 15 character max.
   • program name
   • many processes at a time