Commands tagged ps (86)

  • processes per user counter

    awk is evil! Show Sample Output


    22
    ps hax -o user | sort | uniq -c
    buzzy · 2010-04-29 10:43:03 13
  • Hide the name of a process listed in the `ps` output

    exec -a $NAME $COMMAND $ARGS `your_cmd -erase_all_files` is the real process, but harmless-looking getty appears in the process table. Never actually had a need to do this, but interesting nonetheless... Tested in bash, dash. -a $NAME "pass NAME as the zeroth argument to COMMAND", i.e. customise the name of the process (as commonly seen with `ps`) Show Sample Output


    16
    exec -a "/sbin/getty 38400 tty7" your_cmd -erase_all_files
    mhs · 2012-02-01 10:54:03 8
  • Use top to monitor only all processes with the same name fragment 'foo'

    top accecpts a comma separated list of PIDs.


    15
    top -p $(pgrep -d , foo)
    michelsberg · 2012-06-27 20:59:09 6
  • Search for a process by name

    ps and grep is a dangerous combination -- grep tries to match everything on each line (thus the all too common: grep -v grep hack). ps -C doesn't use grep, it uses the process table for an exact match. Thus, you'll get an accurate list with: ps -fC sh rather finding every process with sh somewhere on the line. Show Sample Output


    14
    ps -fC PROCESSNAME
    pooderbill · 2015-04-20 13:09:44 17
  • Sort all running processes by their memory & CPU usage

    you can also pipe it to "tail" command to show 10 most memory using processes. Show Sample Output


    13
    ps aux --sort=%mem,%cpu
    mrwill · 2009-10-10 22:48:51 7
  • View Processeses like a fu, fu

    I don't truly enjoy many commands more than this one, which I alias to be ps1.. Cool to be able to see the heirarchy and makes it clearer what need to be killed, and whats really going on. Show Sample Output


    8
    command ps -Hacl -F S -A f
    AskApache · 2009-08-19 07:08:19 10
  • easily strace all your apache processes

    This one-liner will use strace to attach to all of the currently running apache processes output and piped from the initial "ps auxw" command into some awk. Show Sample Output


    7
    ps auxw | grep sbin/apache | awk '{print"-p " $2}' | xargs strace
    px · 2011-03-14 21:45:22 34
  • Get a regular updated list of zombies

    to omit "grep -v", put some brackets around a single character


    6
    watch "ps auxw | grep [d]efunct"
    alvinx · 2009-08-12 08:11:16 4
  • processes per user counter

    enumerates the number of processes for each user. ps BSD format is used here , for standard Unix format use : ps -eLf |awk '{$1} {++P[$1]} END {for(a in P) if (a !="UID") print a,P[a]}' Show Sample Output


    6
    ps aux |awk '{$1} {++P[$1]} END {for(a in P) if (a !="USER") print a,P[a]}'
    benyounes · 2010-04-28 15:25:18 3
  • Find the process you are looking for minus the grepped one

    faster ;) but your idea is really cool


    6
    ps -ef | grep c\\ommand
    ioggstream · 2011-01-04 11:43:14 4
  • Get a regular updated list of zombies

    Shows all those processes; useful when building some massively forking script that could lead to zombies when you don't have your waitpid()'s done just right.


    5
    watch "ps auxw | grep 'defunct' | grep -v 'grep' | grep -v 'watch'"
    coffeeaddict_nl · 2009-08-11 12:22:13 4
  • Use top to monitor only all processes with the same name fragment 'foo'

    pgrep foo may return several pids for process foobar footy01 etc. like this: 11427 12576 12577 sed puts "-p " in front and we pass a list to top: top -p 11427 -p 12576 -p 12577


    5
    top $(pgrep foo | sed 's|^|-p |g')
    michelsberg · 2012-06-14 15:13:00 3
  • Output Detailed Process Tree for any User

    An easy function to get a process tree listing (very detailed) for all the processes of any gived user. This function is also in my http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html Show Sample Output


    4
    psu(){ command ps -Hcl -F S f -u ${1:-$USER}; }
    AskApache · 2009-11-13 06:10:33 4
  • total percentage of memory use for all processes with a given name

    This command will add up RAM usage of all processes whose name contains "java" and output the sum of percentages in HRF. Also, unlike the original #15430, it wont fail on processes with a usage of >9.9%. Pleases note that this command wont work reliably in use cases where a significant portion of processes involved are using less than 0.1% of RAM, because they will be counted as "0", even though a great number of them could add up to significant amounts. Show Sample Output


    4
    ps -eo pmem,comm | grep java | awk '{sum+=$1} END {print sum " % of RAM"}'
    bugmenot · 2016-02-10 09:00:56 16
  • Wait for an already launched program to stop before starting a new command.

    Referring to the original post, if you are using $! then that means the process is a child of the current shell, so you can just use `wait $!`. If you are trying to wait for a process created outside of the current shell, then the loop on `kill -0 $PID` is good; although, you can't get the exit status of the process.


    3
    wait $!
    noahspurrier · 2010-06-07 21:56:36 4
  • easily strace all your apache *child* processes

    Like the original version except it does not include the parent apache process or the grep process and adds "sudo" so it can be run by user.


    3
    ps h --ppid $(cat /var/run/apache2.pid) | awk '{print"-p " $1}' | xargs sudo strace
    colinmollenhour · 2012-03-21 01:59:41 3
  • Use top to monitor only all processes with the same name fragment 'foo'

    Like command 10870, but no need for sed


    3
    top '-p' $(pgrep -d ' -p ' foo)
    __ · 2012-06-27 18:32:03 6
  • Find processes utilizing high memory in human readable format

    Finding high memory usage report in human readable format. Show Sample Output


    3
    ps -eo size,pid,user,command --sort -size |awk '{hr[1024**2]="GB";hr[1024]="MB";for (x=1024**3; x>=1024; x/=1024){if ($1>=x){printf ("%-6.2f %s ", $1/x, hr[x]);break}}}{printf ("%-6s %-10s ", $2, $3)}{for (x=4;x<=NF;x++){printf ("%s ",$x)} print ("\n")}'
    rockon · 2012-11-27 04:29:08 11
  • Show the command line for a PID with ps

    Show the command line for a PID with ps


    3
    ps h -o %a 21679
    BeniBela · 2015-09-27 11:00:07 13
  • easily strace all your apache processes

    Will open strace on all apache process, on systems using sbin/apache (debian) or sbin/httpd (redhat), and will follow threads newly created.


    3
    ps auxw | grep -E 'sbin/(apache|httpd)' | awk '{print"-p " $2}' | xargs strace -F
    gormux · 2016-08-04 10:59:58 14
  • Sort processes by CPU Usage

    Short list about top 10 processes, sorted by CPU usage Show Sample Output


    3
    ps aux | sort -rk 3,3 | head -n 10
    x3mboy · 2018-10-29 20:00:36 572
  • Sort processes by CPU Usage


    3
    ps auxk -%cpu | head -n10
    rolanda · 2019-06-29 19:17:14 46
  • Viewing Top Processes according to cpu, mem, swap size, etc.

    I've wanted this for a long time, finally just sat down and came up with it. This shows you the sorted output of ps in a pretty format perfect for cron or startup scripts. You can sort by changing the k -vsz to k -pmem for example to sort by memory instead. If you want a function, here's one from my http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html aa_top_ps(){ local T N=${1:-10};T=${2:-vsz}; ps wwo pid,user,group,vsize:8,size:8,sz:6,rss:6,pmem:7,pcpu:7,time:7,wchan,sched=,stat,flags,comm,args k -${T} -A|sed -u "/^ *PID/d;${N}q"; } Show Sample Output


    2
    command ps wwo pid,user,group,vsize:8,size:8,sz:6,rss:6,pmem:7,pcpu:7,time:7,wchan,sched=,stat,flags,comm,args k -vsz -A|sed -u '/^ *PID/d;10q'
    AskApache · 2010-05-18 18:41:38 6
  • Shows users and 'virtual users' on your a unix-type system

    Shows a list of users that currently running processes are executing as. YMMV regarding ps and it's many variants. For example, you might need: ps -axgu | cut -f1 -d' ' | sort -u Show Sample Output


    2
    ps -eo user | sort -u
    dfaulkner · 2010-07-07 12:28:44 6
  • The Hidden PS

    While going through the source code for the well known ps command, I read about some interesting things.. Namely, that there are a bunch of different fields that ps can try and enumerate for you. These are fields I was not able to find in the man pages, documentation, only in the source. Here is a longer function that goes through each of the formats recognized by the ps on your machine, executes it, and then prompts you whether you would like to add it or not. Adding it simply adds it to an array that is then printed when you ctrl-c or at the end of the function run. This lets you save your favorite ones and then see the command to put in your .bash_profile like mine at : http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html Note that I had to do the exec method below in order to pause with read. t () { local r l a P f=/tmp/ps c='command ps wwo pid:6,user:8,vsize:8,comm:20' IFS=' '; trap 'exec 66 exec 66 $f && command ps L | tr -s ' ' >&$f; while read -u66 l >&/dev/null; do a=${l/% */}; $c,$a k -${a//%/} -A; yn "Add $a" && P[$SECONDS]=$a; done } Show Sample Output


    2
    for p in `ps L|cut -d' ' -f1`;do echo -e "`tput clear;read -p$p -n1 p`";ps wwo pid:6,user:8,comm:10,$p kpid -A;done
    AskApache · 2010-10-12 06:42:10 7
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Uniquely (sort of) color text so you can see changes
Colorify colors input by converting the text to a number and then performing modulo 7 on it. This resulting number is used as the color escape code. This can be used to color the results of commands with complex outputs (like "482279054165371") so if any of the digits change, there's a good chance the color will change too. I say good chance because there's only 7 unique colors here, so assuming you were watching random numbers, there would be a 6/7 chance that the color would change when the number changed. This should really only be used to help quickly identify when things change, but should not be the only thing relied upon to positively assert that an output has not changed.

Change the extension of a filename by using rename to convert
This will change all files ending in .JPG to .jpg and will work with any file extension

Customer Friendly free
makes more sense to customers XD

Convert decimal numbers to binary
Convert some decimal numbers to binary numbers. You could also build a general base-converter: $ function convBase { echo "ibase=$1; obase=$2; $3" | bc; } then you could write $ function decToBun { convBase 10 2 $1; }

Check a server is up. If it isn't mail me.
Alternative to the ping check if your firewall blocks ping. Uses curl to get the landing page silently, or fail with an error code. You can probably do this with wget as well.

Countdown Clock
The biggest advantage over atoponce's nifty original is not killing the scrollback. Written assuming bash, but shouldn't be terribly difficult to port to other shells. S should be multiple spaces, but I can't get commandlinefu to save/show them properly, any help?

List all installed kernels on Ubuntu except current one
Lists all installed kernels minus the current one. This is useful to uninstall older kernels that take too much space on /boot partition.

Find the package that installed a command

Alert visually until any key is pressed
I learned a few things reading this command. But I did run into a few issues: 1. On systems that don't use GNU echo (e.g. macOS 10.14.5 Mojave), the e option may not be supported. In this case ANSI escape codes will echoed as text and the terminal will not flash, like this: \e[?5h\e[38;5;1m A L E R T Thu Jun 20 16:31:29 PDT 2019 2. Since the read command strips\ignores leading backslashes, if a user types the backslash character once in the loop, it will not break. Typing backslash twice in a loop will break as expected. 3. The foreground color is set to red (\e[38;5;1m) on every loop. This could be set once before we call while, and then reset once when the loop breaks. 4. Instead of resetting the foreground color when it breaks, the video mode is set back to normal (\e[?5l). This has the effect of leaving the terminal text red until it is manually reset. The alternative I'm proposing here addresses these issues. I tested it on macOS and Arch Linux.

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