{"id":8126,"date":"2021-03-12T12:57:10","date_gmt":"2021-03-12T09:57:10","guid":{"rendered":"https:\/\/kifarunix.com\/?p=8126"},"modified":"2024-03-19T19:20:20","modified_gmt":"2024-03-19T16:20:20","slug":"example-usage-of-ps-command-in-linux","status":"publish","type":"post","link":"https:\/\/kifarunix.com\/example-usage-of-ps-command-in-linux\/","title":{"rendered":"Example Usage of ps Command in Linux"},"content":{"rendered":"
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\"Example<\/figure><\/div>\n\n\n

This guide will take you through various example usage of ps<\/code> command in Linux\/Unix system. ps<\/code>, an acronym for Processes Status<\/strong> is a utility used to display running processes on Linux\/Unix systems system. It reports a snapshot of the current system processes.<\/p>\n\n\n\n

Syntax: ps [options]<\/code><\/pre>\n\n\n\n
ps accepts three types of options:<\/strong><\/p>\n\n\n\n
 1.UNIX options, which may be grouped and must be preceded by a dash (-)
 2. BSD options, which may be grouped and must not be used with a dash.
 3. GNU long options, which are preceded by two dashes (–)<\/p>\n\n\n\n
Using of ps Command in Linux<\/h2>\n\n\n\n
1. Display processes associated with the current shell.<\/p>\n\n\n\n
When run without any arguments, ps<\/code> command displays the processes associated with the current shell.<\/p>\n\n\n\n
 ps<\/code><\/pre>\n\n\n\n
 PID    TTY        TIME   CMD\n1446588 pts\/0    00:00:00 bash\n1570347 pts\/0    00:00:00 ps<\/code><\/pre>\n\n\n\n
By default you will obtain the following information:<\/p>\n\n\n\n
    \n
  •  PID<\/strong> The process ID of the process<\/li>\n\n\n\n
  • TTY<\/strong> The name of the terminal session (shell) that the process is running within<\/li>\n\n\n\n
  • TIME<\/strong> The amount of CPU time used by the process<\/li>\n\n\n\n
  • CMD<\/strong> The name of the command that was entered to create the process<\/li>\n<\/ul>\n\n\n\n
    2.<\/strong> To display all processes running on the system, type ps -e<\/code> or ps -A<\/code> <\/strong>command.<\/p>\n\n\n\n
    ps -e<\/code><\/pre>\n\n\n\n
        PID TTY         TIME  CMD\n      1 ?        00:00:23 systemd\n      2 ?        00:00:00 kthreadd\n      3 ?        00:00:00 rcu_gp\n      4 ?        00:00:00 rcu_par_gp\n      6 ?        00:00:00 kworker\/0:0H-kblockd\n      8 ?        00:00:00 mm_percpu_wq\n      9 ?        00:00:01 ksoftirqd\/0\n     10 ?        00:00:56 rcu_sched\n<\/code><\/pre>\n\n\n\n
    ps -A <\/code><\/pre>\n\n\n\n
        PID TTY         TIME  CMD\n      1 ?        00:00:23 systemd\n      2 ?        00:00:00 kthreadd\n      3 ?        00:00:00 rcu_gp\n      4 ?        00:00:00 rcu_par_gp\n      6 ?        00:00:00 kworker\/0:0H-kblockd\n      8 ?        00:00:00 mm_percpu_wq\n      9 ?        00:00:01 ksoftirqd\/0\n     10 ?        00:00:56 rcu_sched<\/code><\/pre>\n\n\n\n
    3.<\/strong>To display full-format listing, type ps -ef<\/code> or ps -eF <\/code>command.<\/p>\n\n\n\n
    ps -ef<\/code><\/pre>\n\n\n\n
    UID          PID    PPID  C STIME TTY         TIME  CMD\nroot           1       0  0 11:10 ?        00:00:23 \/sbin\/init splash\nroot           2       0  0 11:10 ?        00:00:00 [kthreadd]\nroot           3       2  0 11:10 ?        00:00:00 [rcu_gp]\nroot           4       2  0 11:10 ?        00:00:00 [rcu_par_gp]\nroot           6       2  0 11:10 ?        00:00:00 [kworker\/0:0H-kblockd]\n<\/code><\/pre>\n\n\n\n
    ps -eF<\/code><\/pre>\n\n\n\n
    UID          PID    PPID  C    SZ   RSS PSR STIME TTY         TIME  CMD\nroot           1       0  0 42347 10916   2 11:10 ?        00:00:23 \/sbin\/init splash\nroot           2       0  0     0     0   2 11:10 ?        00:00:00 [kthreadd]\nroot           3       2  0     0     0   0 11:10 ?        00:00:00 [rcu_gp]\nroot           4       2  0     0     0   0 11:10 ?        00:00:00 [rcu_par_gp]\nroot           6       2  0     0     0   0 11:10 ?        00:00:00 [kworker\/0:0H-kblockd]<\/code><\/pre>\n\n\n\n
    The addition information include:<\/p>\n\n\n\n
      \n
    • UID<\/strong> The user ID of the process\u2019s owner<\/li>\n\n\n\n
    • PPID<\/strong> The PID of the process\u2019s parent process<\/li>\n\n\n\n
    • C<\/strong> The amount of processor time utilized by the process<\/li>\n\n\n\n
    • RSS<\/strong> How much RAM is utilized at the time the command is output<\/li>\n\n\n\n
    • PSR<\/strong> Processor that process is currently assigned to<\/li>\n\n\n\n
    • STIME<\/strong> The time that the process started<\/li>\n<\/ul>\n\n\n\n
      4.<\/strong> To display long format of the ps<\/code> output, type ps -efl<\/code> or ps -eFl<\/code> command.<\/p>\n\n\n\n
      ps -efl<\/code><\/pre>\n\n\n\n
      F S UID          PID    PPID  C PRI  NI ADDR SZ WCHAN  STIME TTY         TIME  CMD\n4 S root           1       0  0  80   0 - 42347 -      11:10 ?        00:00:25 \/sbin\/init splash\n1 S root           2       0  0  80   0 -     0 -      11:10 ?        00:00:00 [kthreadd]\n1 I root           3       2  0  60 -20 -     0 -      11:10 ?        00:00:00 [rcu_gp]\n1 I root           4       2  0  60 -20 -     0 -      11:10 ?        00:00:00 [rcu_par_gp]\n<\/code><\/pre>\n\n\n\n
      ps -eFl<\/code><\/pre>\n\n\n\n
      F S UID          PID    PPID  C PRI  NI ADDR SZ WCHAN    RSS PSR STIME TTY         TIME  CMD\n4 S root           1       0  0  80   0 - 42347 -      10916   1 11:10 ?        00:00:25 \/sbin\/init splash\n1 S root           2       0  0  80   0 -     0 -          0   2 11:10 ?        00:00:00 [kthreadd]\n1 I root           3       2  0  60 -20 -     0 -          0   0 11:10 ?        00:00:00 [rcu_gp]\n1 I root           4       2  0  60 -20 -     0 -          0   0 11:10 ?        00:00:00 [rcu_par_gp]<\/code><\/pre>\n\n\n\n
      We obtain the following information:<\/p>\n\n\n\n