ps (''process status'') program displays the currently-running processes. The related Unix utility top provides a real-time view of the running processes.
Implementations
KolibriOS includes an implementation of the command. The command has also been ported to the IBM i operating system. In Windows PowerShell,ps is a predefined command alias for the Get-Process cmdlet, which essentially serves the same purpose.
Examples
ps with other commands, such as less to view the process status output one page at a time:
ps command in conjunction with the grep command (see the pgrep and pkill commands) to find information about a single process, such as its id: pgrep simplifies the syntax and avoids potential race conditions:
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Options
ps has many options. On ps commonly runs with the options -ef, where "-e" selects every process and "-f" chooses the "full" output format. Another common option on these systems is -l, which specifies the "long" output format.
Most systems derived from BSD fail to accept the SUS and POSIX standard options because of historical conflicts. (For example, the "e" or "-e" option will display ps commonly runs with the non-standard options aux, where "a" lists all processes on a terminal, including those of other users, "x" lists all processes without controlling terminals and "u" adds a column for the controlling user for each process. For maximum compatibility, there is no "-" in front of the "aux". "ps auxww" provides complete information about the process, including all parameters.
See also
* Task manager * kill (command) * List of Unix commands * nmon – a system monitor tool for AIX and Linux operating systems * pstree (Unix) * lsofReferences
Further reading
* *External links
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