Commands using top (20)

  • This command starts screen with 'htop', 'nethogs' and 'iotop' in split-screen. You have to have these three commands (of course) and specify the interface for nethogs - mine is wlan0, I could have acquired the interface from the default route extending the command but this way is simpler. htop is a wonderful top replacement with many interactive commands and configuration options. nethogs is a program which tells which processes are using the most bandwidth. iotop tells which processes are using the most I/O. The command creates a temporary "screenrc" file which it uses for doing the triple-monitoring. You can see several examples of screenrc files here: http://www.softpanorama.org/Utilities/Screen/screenrc_examples.shtml


    18
    tmpfile=$(mktemp) && echo -e 'startup_message off\nscreen -t top htop\nsplit\nfocus\nscreen -t nethogs nethogs wlan0\nsplit\nfocus\nscreen -t iotop iotop' > $tmpfile && sudo screen -c $tmpfile
    Patola · 2009-08-03 10:14:02 2
  • top accecpts a comma separated list of PIDs.


    15
    top -p $(pgrep -d , foo)
    michelsberg · 2012-06-27 20:59:09 0
  • 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 0

  • 4
    top -b -n 1 | awk '{if (NR <=7) print; else if ($8 == "D") {print; count++} } END {print "Total status D: "count}'
    jcgam69 · 2009-02-19 21:14:46 5

  • 3
    top -b -n 1 | sed 1,6d
    mlsmaycon · 2012-03-01 13:27:55 0
  • Like command 10870, but no need for sed


    3
    top '-p' $(pgrep -d ' -p ' foo)
    __ · 2012-06-27 18:32:03 3
  • running top command in batch mode. it is usefull if you want to redirect the output in a file. Show Sample Output


    2
    top -b -n 1
    r00t4u · 2010-01-24 16:17:30 1
  • This version is precise and requires one second to collect statistics. Check sample output for a more generic version and also a remote computer invocation variant. It doesn't work with the busybox version of the 'top' command but can be adjusted Show Sample Output


    1
    top -bn2|awk -F, '/Cpu/{if (NR>4){print 100-gensub(/.([^ ]+).*/,"\\1","g",$4)}}'
    ichbins · 2014-04-18 17:48:05 0
  • 1. Start a process, such as 'top' command 2. # suspend process {ctrl-Z} 3. # background process bg 4. # list all backgrounded jobs jobs 5. # bring it back to foreground fg


    1
    top; ctrl-z; bg; jobs; fg
    djangofan · 2015-10-14 17:33:25 0
  • An advanced possibility to count the lines of code like in #8394 Show Sample Output


    0
    find . -type f -name '*.php' | xargs cat | sed -re ':top /\/\*.*\*\// { s/\/\*.*\*\///g ; t top }; /\/\*/ { N ; b top }' | awk '$0 !~ /^[\t[:space:]]*($|(\/\/)|(#))/' | wc -l
    andrehgw · 2011-05-05 06:12:34 1
  • Show only specific process id's using Top Show Sample Output


    0
    top -p `pidof apache2 | awk '{gsub(/[ ]/,",");print}'`
    hbalagtas · 2011-07-28 20:13:36 0
  • You can also use different process using comma: top -p `pgrep pidgin`, `pgrep python` but you have to make sure the process exists or you'll get an error Show Sample Output


    0
    top -p `pgrep pidgin`
    cesarbustios · 2011-11-23 20:35:53 0
  • Get the current cpu % usage on your system. Show Sample Output


    0
    top -n2 -d 0.5 | grep ^Cpu | sed 's/[[:alpha:]%]*//g' | awk 'NR == 2 {printf("%.2f\n",100-$5)}'
    wizzra · 2012-09-06 12:56:26 0
  • Monitoring system in one line : DISK : disk space MEM: memory ( mem , swap, Total) CPU : all information about cpu activity LOAD : load average Show Sample Output


    0
    echo "DISK:";df -Pl | grep -v "Filesystem" | awk '{print $5,$6}' ; echo "MEM:" ; free -mto | awk '{ print $1,$2,$3,$4 }'; echo "CPU:"; top -b -d1 -n1 | grep Cpu | awk '{print $2,$3,$4,$5,$6,$7,$8,$9}';echo "LOAD:"; cat /proc/loadavg
    injez · 2014-09-29 12:43:52 0
  • This command greps the full name of processes. If you have processes with parameters(which you can see by pressing key 'c' in top) - this is the case


    0
    top -p $(pgrep -f -d , foo)
    sedpro · 2015-03-03 17:18:54 0
  • Display the top processes sorted by memory usage. This is mostly useful because it's easy to remember and can give me a quick 'top' view of a group of servers when used over pssh. (Though I'd recommend |head -10 to minimize the output). Show Sample Output


    0
    top -b -o +%MEM |head -17
    dak1n1 · 2016-03-16 22:14:34 0
  • I found Flash eating one of my CPUs after resume, the command above will help with that. For optional kicks you can put it into a script in /etc/pm/sleep.d/ (aspect in #swhack wrote this for me)


    -1
    top -bn 1 | awk '{if($1 ~ /^[0-9]+$/ && $9 > 97) {print $1;exit}}'|xargs kill
    chx · 2010-06-02 13:51:40 0
  • top

    usage: top -hv | -bcisSHM -d delay -n iterations [-u user | -U user] -p pid [,pid ...] Show Sample Output


    -2
    top
    atgf0127 · 2011-04-14 06:59:06 0
  • Of course, the httpd can be replaced with any other process name Show Sample Output


    -4
    top -b -n 1 |grep httpd|wc -l
    dotanmazor · 2010-07-25 08:40:03 0
  • A simple but effective replacement for ps aux. I used to waste my time running ps over and over; top is the way to go. It also allows complex sorting options. Press q to exit "nicely" (Ctrl + C is always an option, of course). Note that the list updates each second, resorting in the process; if you're trying to grab a specific PID, you might be better off with ps. htop Alternatively, htop is available, though it may not come pre-installed. htop is slightly more interactive than top and includes color coding, visuals, and a nice interface for selecting and then killing processes. (Thanks to bwoodacre for this great tool.) Show Sample Output


    -5
    top
    Zenexer · 2009-03-18 00:03:42 6

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Remove a line in a text file. Useful to fix "ssh host key change" warnings

Search through files, ignoring .svn

List top 10 files in filesystem or mount point bigger than 200MB
Specify the size in bytes using the 'c' option for the -size flag. The + sign reads as "bigger than". Then execute du on the list; sort in reverse mode and show the first 10 occurrences.

Sort files in folders alphabetically
Creates one letter folders in the current directory and moves files with corresponding initial in the folder.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Use tcpdump to monitor all DNS queries and responses

Start another X session in a window
You might have Xnest (older) rather than Xephyr. You can experiment with other desktops eg: startx /usr/bin/start-kde -- /usr/bin/Xephyr :2 You can start X on a remote machine (although I'd recommend vnc for anything slower than a LAN): startx /usr/bin/ssh -X gnome-session -- /usr/bin/Xephyr :2 Or just start another X session locally talking to the remote backend:

Set laptop display brightness
Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"


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