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ps

summary

    This subchapter looks at ps, a UNIX (and Linux) command.

    ps gives information about running processes.

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ps

    This subchapter looks at ps, a UNIX (and Linux) command.

    ps is used to obtain information on running processes.

info on processes

    Type ps followed by the option -a (for “all”). An optional pipe to more or less will provide one page of info at a time.

    $ ps -a |more

    ps can be used to monitor the use of a server or system.

    ps can be used to find processes that are stuck, which can then be killed.

full information

    Type ps followed by the -ef options to see most of the available information on processes.

    $ ps -ef |less

    On a Solaris system you will want to use the -aux options.

    $ ps -aux |less

monitor processes

    ps -ax will provide information on most running processes. You can use the command to establish the baseline performance for your server and to monitor errant processes.

    $ ps -ax

searching for specific content

    You can use the following example to monitor a specific string or name from the overall output (where term is replaced with the specific string or name you want):

    $ ps -ef|grep term

daemons

    On Linux you use the following to get information on core processes and daemons:

    $ /sbin/chkconfig --list

other

    On November 8, 2010, Ramesh Natarajan named this the number 22 most frequently used UNIX/Linux command at this web page 50 Most Frequently Used UNIX / Linux Commands (With Examples).

    In June 2009, Ken Milberg named this command as one of the Top 50 universal UNIX commands at this web page Top 50 Universal INIX commands. Note that this web page requires agreeing to be spammed before you can read it.

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