a Select all processes except both session leaders (see getsid(2)) and A Select all processes, including those of other users. A process will thus be shown if it meets any of the given selection criteria. The default selection is discarded, and then the selected processes are added to the set of processes to be displayed. These effects are not considered when options are described as being "identical" below, so -M will be considered identical to Z and so on.Įxcept as described below, process selection options are additive. The use of BSD-style options will also change the process selection to include processes on other terminals (TTYs) that are owned by you alternately, this may be described as setting the selection to be the set of all processes filtered to exclude processes owned by other users or not on a terminal. You can override this with the PS_FORMAT environment variable. The use of BSD-style options will add process state (stat=STAT) to the default display and show the command args (args= COMMAND) instead of the executable name. It displays the process ID (pid=PID), the terminal associated with the process (tname=TTY), the cumulated CPU time in hh:mm:ss format (time=TIME), and the executable name (ucmd=CMD). It is fragile, subject to change, and thus should not be relied upon.īy default, ps selects all processes with the same effective user ID (euid=EUID) as the current user and associated with the same terminal as the invoker. This behavior is intended to aid in transitioning old scripts and habits. If the user named "x" does not exist, this ps may interpret the command as "ps aux" instead and print a warning. The POSIX and UNIX standards require that "ps -aux" print all processes owned by a user named "x", as well as printing all processes that would be selected by the -a option. Note that "ps -aux" is distinct from "ps aux". There are some synonymous options, which are functionally identical, due to the many standards and ps implementations that this ps is compatible with. Options of different types can be freely mixed, but conflicts can appear. GNU long options, which are preceded by two dashes.BSD options, which may be grouped and must not be used with a dash.UNIX options, which may be grouped and must be preceded by a dash.This version of ps accepts 3 kinds of option: If you want a repetitive update of this status, use top. Process status, information about processes running in memory.
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