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ps aux output meaning 

$ ps aux  
USER       PID  %CPU %MEM  VSZ RSS     TTY   STAT START   TIME COMMAND
timothy  29217  0.0  0.0 11916 4560 pts/21   S+   08:15   0:00 pine  
root     29505  0.0  0.0 38196 2728 ?        Ss   Mar07   0:00 sshd: can [priv]   
can      29529  0.0  0.0 38332 1904 ?        S    Mar07   0:00 sshd: can@notty
  • USER = user owning the process
  • PID = process ID of the process
  • %CPU = It is the CPU time used divided by the time the process has been running.
  • %MEM = ratio of the process’s resident set size to the physical memory on the machine
  • VSZ = virtual memory usage of entire process (in KiB)
  • RSS = resident set size, the non-swapped physical memory that a task has used (in KiB)
  • TTY = controlling tty (terminal)
  • STAT = multi-character process state
  • START = starting time or date of the process
  • TIME = cumulative CPU time
  • COMMAND = command with all its arguments
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