o format Specify user-defined format. Identical to -o and --format.
-o format User-defined format.
format is a single argument in the form of a blank-separated or comma-separated list,
which offers a way to specify individual output columns. The recognized keywords are
described in the STANDARD FORMAT SPECIFIERS section below. Headers may be renamed
(ps -o pid,ruser=RealUser -o comm=Command) as desired. If all column headers are empty
(ps -o pid= -o comm=) then the header line will not be output. Column width will increase
as needed for wide headers; this may be used to widen up columns such as WCHAN
(ps -o pid,wchan=WIDE-WCHAN-COLUMN -o comm). Explicit width control
(ps opid,wchan:42,cmd) is offered too. The behavior of ps -o pid=X,comm=Y varies with
personality; output may be one column named "X,comm=Y" or two columns named "X" and "Y".
Use multiple -o options when in doubt. Use the PS_FORMAT environment variable to specify
a default as desired; DefSysV and DefBSD are macros that may be used to choose the
default UNIX or BSD columns.
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