$ps aux

Symptoms
  • The ps command, for Process Status, displays a header line followed by lines containing information about the processes that are running on the IPSO platform.
    For example:

    [admin]# ps -aux
    USER      PID     %CPU   %MEM   VSZ   RSS   TT   STAT STARTED   TIME       COMMAND
    root      6372    0.0     0.1   432   220   p0   R+    3:15PM    0:00.02   ps -aux
    root      1       0.0     0.1   356   192   ??   Is    1:35PM   20:00.04   /sbin/init --
    root      2       0.0     0.0   0     20    ??   DL    1:35PM   20:00.02   (pagedaemon)
    root      3       0.0     0.0   0     20    ??   DL    1:35PM   20:00.00   (vmdaemon)
    root      4       0.0     0.0   0     20    ??   DL    1:36PM   25:10.79   (update)
    root      64      0.0     0.2   184   392   ??   Ss    1:36PM   14:53.46   syslogd -6
    root      74      0.0     0.2   832   552   ??   Is    1:36PM   20:00.20   /bin/pm
    root      197     0.0     0.2   160   492   ??   Is    1:36PM   20:00.02   /usr/libexec/g
    root      198     0.0     0.2   160   492   ??   Is    1:36PM   20:00.01   /usr/libexec/g
    root      199     0.0     0.2   160   492   ??   Is    1:36PM   20:00.01   /usr/libexec/g
    root      200     0.0     0.2   648   528   d0   Is    1:36PM   20:00.09   -csh (csh)
Solution

USER  PID  %CPU  %MEM   VSZ  RSS  TT  STAT STARTED TIME COMMAND

    • USER – User that is related to the process.
    • PID – Process ID used by each process.
    • %CPU – The cpu utilization of the process; this is a decaying average over up to a minute of previous (real) time.  Since the time base over which this is computed varies (as processes may be very young), it is possible for the sum of all %CPU fields to exceed 100%.
    • %MEM – The percentage of real memory used by the process.
    • VSZ – Virtual size of the memory used by the process.
    • RSS – The Real memory (resident set) size of the process. This is indicated in 1024 byte units.
    • TT – An abbreviation for the pathname of the controlling terminal, if any.  The abbreviation consists of the three letters following stdin.
  • STAT – The state is given by a sequence of letters.  The first letter indicates the run state of the process:
      • D – Marks a process in disk (or other short term, uninterruptible) wait.
      • I – Marks a process that is idle (sleeping for longer than about 20 seconds).
      • R – Marks a runnable process.
      • S – Marks a process that is sleeping for less than about 20 seconds.
      • T – Marks a stopped process.
    • Z – Marks a dead process (a “zombie”).

 

 

  • STARTED – The time the command started.

 

  • COMMAND – What is the name of the process running.
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