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:

    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.

    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

    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

    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

    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

    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

    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

    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 6
  • Show only specific process id's using Top Show Sample Output

    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

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

    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

    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 7
  • 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

    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

    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)

    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

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

    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

    Zenexer · 2009-03-18 00:03:42 6

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a trash function for bash
Every rm'ed a file you needed? Of course you haven't. But I have. I got sick of it so I created a bash function. Here it is. It'll put trashed files into a $HOME/.Trash/"date" folder according to the date. I have rm aliased to it as well in my bashrc so that I still use the rm command. It'll choke if you attempt to trash a directory if that directory name is already in the Trash. This rarely happens in my case but it's easy enough to add another test and to mv the old dir if necessary. function trash(){ if [ -z "$*" ] ; then echo "Usage: trash filename" else DATE=$( date +%F ) [ -d "${HOME}/.Trash/${DATE}" ] || mkdir -p ${HOME}/.Trash/${DATE} for FILE in $@ ; do mv "${FILE}" "${HOME}/.Trash/${DATE}" echo "${FILE} trashed!" done fi }

Add timestamp to history
History usually only gives the command number and the command. This will add a timestamp to the history file. Note: this will only put the correct timestamp on commands used after the export is done. You may want to put this in your .bashrc

Execute a command with a timeout
I like much more the perl solution, but without using perl. It launches a backgroup process that will kill the command if it lasts too much. A bigger function: check_with_timeout() { [ "$DEBUG" ] && set -x COMMAND=$1 TIMEOUT=$2 RET=0 # Launch command in backgroup [ ! "$DEBUG" ] && exec 6>&2 # Link file descriptor #6 with stderr. [ ! "$DEBUG" ] && exec 2> /dev/null # Send stderr to null (avoid the Terminated messages) $COMMAND 2>&1 >/dev/null & COMMAND_PID=$! [ "$DEBUG" ] && echo "Background command pid $COMMAND_PID, parent pid $$" # Timer that will kill the command if timesout sleep $TIMEOUT && ps -p $COMMAND_PID -o pid,ppid |grep $$ | awk '{print $1}' | xargs kill & KILLER_PID=$! [ "$DEBUG" ] && echo "Killer command pid $KILLER_PID, parent pid $$" wait $COMMAND_PID RET=$? # Kill the killer timer [ "$DEBUG" ] && ps -e -o pid,ppid |grep $KILLER_PID | awk '{print $1}' | xargs echo "Killing processes: " ps -e -o pid,ppid |grep -v PID | grep $KILLER_PID | awk '{print $1}' | xargs kill wait sleep 1 [ ! "$DEBUG" ] && exec 2>&6 6>&- # Restore stderr and close file descriptor #6. return $RET }

gets all files committed to svn by a particular user since a particular date
just change the date following the -r flag, and/or the user name in the user== conditional statement, and substitute yms_web with the name of your module

Check if a remote port is up using (i.e. from behind a firewall/proxy)
Shell function; returns 0 if the port is up, 1 otherwise (check $? after executing). First parameter: IP address/hostname Second parameter: port number There is no error checking for the input parameters.

edit hex mode in vim
return to normal mode from hex mode :%!xxd -r

check open ports without netstat or lsof

View network activity of any application or user in realtime
The "-r 2" option puts lsof in repeat mode, with updates every 2 seconds. (Ctrl -c quits) The "-p" option is used to specify the application PID you want to monitor. The "-u' option can be used to keep an eye on a users network activity. "lsof -r 2 -u username -i -a"

Simulate typing

Change active bond slave
This forces a bonded interface to switch to another slave in the bond as its active slave.

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