![]() ![]() A process is 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 is considered identical to Z and so on.Įxcept as described below, process selection options are additive. The use of BSD-style options also changes the process selection to include processes on other TTYs (terminals) 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 adds process state ( stat=STAT) to the default display and show the command arguments ( 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). This behavior is intended to aid in the transitioning of legacy scripts, but it is 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. If the user named " x" does not exist, 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", and printing all processes that would be selected by the -a option. ![]() Note that " ps -aux" is different than " ps aux". There are some synonymous options, which are functionally identical, due to the many standards and compatible ps implementations. Options of different types may be freely mixed, but might cause conflicts. 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 documentation describes a version of ps common to many distributions of Linux. Every operating system's version of ps is slightly different, so consult your documentation for specific options. Where 3rd column indicates start time sonce.On every UNIX-like operating system, the process status command ( ps) displays information about active processes. Output will be process name and process Id. Know which process is using a particular file. You will be able to see all files opened by the process. Step 2 : Now execute below command #ls -ltr /proc//fd/* Or #ps -ef | grep osi | grep -v grep | awk '' | head -1 Then execute lsof -i command #lsof -i | grep įifth column in the output will show whether its listening on ipv4 or ipv6.įind files used/opened by a particular process ![]() Step 1 : # First find pid of process #ps -ef | grep Example of ps Command psĢ764 pts/1 00:00:00 Some Other Common Example How to find whether java application is listening on IPv4 or IPv6 Ps( process) command in linux is used to report the active process status. ![]()
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