![]() 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. Please do let us know if you have any questions, queries or suggestions using the comment box below.On every UNIX-like operating system, the process status command ( ps) displays information about active processes. We now end this tutorial on how to use ps command in Linux. There are plenty of other options that can be used with ps command also, to get the complete list of options available, we can use help, These were some of the examples for using ps command in Linux. Now we will only get pid, cmd, user & etime in the output of ps command. If we only need some of the fields from the output of ps command, then we can use option ‘o’ to do so, To get the list of all processes that are running on a particular terminal, we can use the following command, To get list of all parent & child processes, use the following command, To the processes running under a group, we can use option ‘G’ followed by either group name or group id, Or we can also mention the UID/user id instead of the user name, To get the list of processes running under another user, we can use the option ‘U’ with ps command, To get the list of processes running under the currently logged in user, use Get process information for the current user To get information about a single process, we can filter the process with ‘grep’ command, To perform a full-listing of process, use These are other commands to get a list of all processes. PID- process id, TTY- terminal for user, TIME- time since the process is running, CMD- the command that launched the process. The results will have process information in 4 columns i.e. In this tutorial, we will learn to use the ps command with the help of some examples. Information about the processes is stored in virtual files in /proc, ps command process information from these files & provides us with the process information. Recommended Read: How to change timezone in LinuxĪlso Read: Install EPEL repository on CentOS/RHEL 6, 7 & 8 It will provide a list of processes along with their PIDs & some other information about processes as well. PS command in linux lists out all the processes that are currently running on the system. PS command, ‘process status’, is used for checking & managing all the Linux processes. There are many commands that help us accomplish that but none is as popular & widely used as ‘ps’. So in order to administer a Linux system, we should also know how to effectively manage the Linux processes. Linux has a number of processes running together without them being interfering with each other.
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