Commands tagged monitoring (17)

  • Monitor open connections for httpd including listen, count and sort it per IP

    It's not my code, but I found it useful to know how many open connections per request I have on a machine to debug connections without opening another http connection for it. You can also decide to sort things out differently then the way it appears in here. Show Sample Output


    18
    watch "netstat -plan|grep :80|awk {'print \$5'} | cut -d: -f 1 | sort | uniq -c | sort -nk 1"
    ik_5 · 2010-03-15 09:27:43 1
  • List files accessed by a command

    Can be run as a script `ftrace` if my_command is substrituted with "$@" It is useful when running a command that fails and you have the feeling it is accessing a file you are not aware of. Show Sample Output


    17
    strace -ff -e trace=file my_command 2>&1 | perl -ne 's/^[^"]+"(([^\\"]|\\[\\"nt])*)".*/$1/ && print'
    unixmonkey8046 · 2011-08-16 15:00:18 2
  • Cheap iftop

    Shows updated status in a terminal window for connections to port '80' in a human-friendly form. Use 'watch -n1' to update every second, and 'watch -d' to highlight changes between updates. If you wish for status updates on a port other than '80', always remember to put a space afterwards so that ":80" will not match ":8080". Show Sample Output


    7
    watch 'netstat -anptu |egrep "^Proto|:80 "'
    Mozai · 2011-05-18 15:05:52 4
  • whowatch: Linux and UNIX interactive, process and users monitoring tool

    whowatch is a interactive, ncurses-based, process and users monitoring tool, which updates information in real time. This is a perfect tool for local and remote servers. It displays information about the users currently logged on to the machine, in real-time. Besides standard information (login name, tty, host, user's process), the type of the connection (ie. telnet or ssh) is shown. Display of users command line can be switch to tty idle time. Certain user can be selected and his processes tree may be viewed as well as tree of all system processes. Tree may be displayed with additional column that shows owner of each process. In the process tree mode SIGINT and SIGKILL signals can be sent to the selected process. Killing processes is just as simple and fun as deleting lines on the screen.


    4
    whowatch
    cryptema · 2011-06-30 22:45:39 1
  • Output system statistics every 5 seconds with timestamp

    See man vmstat for information about the statistics. This does the same thing without the timestamp: vmstat 5 Show Sample Output


    3
    while [ 1 ]; do echo -n "`date +%F_%T`" ; vmstat 1 2 | tail -1 ; sleep 4; done
    plasticboy · 2009-03-26 19:16:55 0
  • Monitor incoming connections of proxies and balancers.

    Maybe this will help you to monitor your load balancers or reverse proxies if you happen to use them. This is useful to discover TIME OUTS and this will let you know if one or more of your application servers is not connected by checking. Show Sample Output


    2
    watch -n 1 "/usr/sbin/lsof -p PID |awk '/TCP/{split(\$8,A,\":\"); split(A[2],B,\">\") ; split(B[1],C,\"-\"); print A[1],C[1],B[2], \$9}' | sort | uniq -c"
    ideivid · 2011-08-12 19:16:38 0
  • Testing ftp server status

    I must monitorize a couple of ftp servers every morning WITHOUT a port-scanner Instead of ftp'ing on 100 ftp servers manually to test their status I use this loop. It might be adaptable to other services, however it may require a 'logout' string instead of 'quit'. The file ftps.txt contains the full list of ftp servers to monitorize.


    1
    for host in $(cat ftps.txt) ; do if echo -en "o $host 21\nquit\n" |telnet 2>/dev/null |grep -v 'Connected to' >/dev/null; then echo -en "FTP $host KO\n"; fi done
    vlan7 · 2010-01-26 15:34:18 0
  • Monitor changed files into a log file, with day rotation, using fswatch (MacOS)

    This command monitors changes in the current folder structure (subfolders included) and files, and log it into a hidden file in the same folder, called `.file_changes_YYMMDD.log`. Modify the `--exclude` parameters to define what should be skipped. Show Sample Output


    1
    fswatch --exclude=.git/* --exclude=.settings --event-flags --event-flag-separator=\; -t -f '%Y-%m-%d %H:%M:%S' . >> ./.file_changes_$(date +"%Y-%m-%d" | sed s/-//g).log
    paulera · 2023-08-17 23:06:30 0
  • Monitor especific process with top

    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
  • Monitoring file change while a copy

    Sometime you need to monitor file or direcory change in dimension or other attributes. This command output file (called myfile in the example) attributes in the top of the screen, updating each 1 second. You should change update time, command ( e.g., ls -all ) or target ( myfile, mydir, etc...). Show Sample Output


    0
    while true; do ls -all myfile; spleep 1; clear; done
    ivodeblasi · 2013-03-26 09:13:19 0
  • Monitoring file change while a copy


    0
    watch "ls -al myfile"
    tonk · 2013-05-08 12:40:40 0
  • Monitor open connections for httpd including listen, count and sort it per IP

    Doesn't list connections to other ports than port 80. Not f.e. 8080 or 8091. Excludes programs listening for connections, like your favorite webserver.


    0
    watch "netstat -plan | grep -v LISTEN | grep \":80 \" | awk {'print \$5'} | cut -d: -f 1 | uniq -c | sort -nk 1"
    simonsimcity · 2013-09-05 13:50:00 0
  • List user processes with their memory usage and total usage.

    Add up the amount of memory your processes are using and display the total. Replace marcanuy with your desired username. Show Sample Output


    0
    ps -u marcanuy -o pid,rss,command | awk '{print $0}{sum+=$2} END {print "Total", sum/1024, "MB"}'
    marcanuy · 2013-11-20 01:21:59 0
  • Resource Monitoring

    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
  • Human readable docker stats output

    Show Sample Output


    0
    docker stats --no-stream $( docker ps -q ) | sed -e "$( docker ps --format "{{.ID}} {{.Names}}" | sed -e "s/\(.*\) \(.*\)/s\/\1\/\2\t\/g;/" )"
    gtron · 2016-04-14 15:20:13 0
  • Start monitoring your server with a single curl command.

    activate the first alert and the next ones are activated automatically. Show Sample Output


    0
    curl ping.gl
    wuseman1 · 2022-10-15 13:24:45 0
  • Monitoring TCP connections number

    Monitoring TCP connections number showing each state. It uses ss instead of netstat because it's much faster with high trafic. You can fgrep specific ports by piping right before awk: watch "ss -nat | fgrep :80 | awk '"'{print $1}'"' | sort | uniq -c" Show Sample Output


    -1
    watch "ss -nat | awk '"'{print $1}'"' | sort | uniq -c"
    ricardofunke · 2012-12-07 19:07:33 2

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Fork Bomb for Windows
Quick and dirty forkbomb for all flavors of windows Do not use in production. Replace start with a command of your choice, this will just open a new command prompt and is pretty tricky to stop once started

Sort file greater than a specified size in human readeable format including their path and typed by color, running from current directory
1. find file greater than 10 MB 2. direct it to xargs 3. xargs pass them as argument to ls

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

String to binary
Cool but useless.

Update zone file Serial numbers
Will edit *.db files in the same directory with todays date. Useful for doing a mass update to domains on a nameserver, adding spf records, etc. Looks for a string starting with 200 or 201 followed by 7 numbers, and replaces with todays date. This won't overwrite Ip's but i would still do some double checking after running this. Make sure your server's date is correct, otherwise insert your own serial number. $rndc reload should usually follow this command.

Grab just the title of a youtube video
There's another version on here that uses GET but some people don't have lwp-request, so here's an alternative. It's also a little shorter and should work with most youtube URLs since it truncates at the first &

a fast way to repeat output a byte
the speed is about 500MB/s on my machine. i think it's fast enough to output not too many bytes. while a C program may output 1GB per sencond on my machine. if the size is not the power of 512,you may change the bs and count in dd.

Play music from youtube without download

slow down CPU and IO for process and its offsprings.

convert filenames in current directory to lowercase
This will convert filenames from uppercase to lowercase. I find this useful after downloading images from my digital camera. This works for English, but other languages may need something slightly more complex like this: $ for i in *; do mv "$i" "$(echo $i|tr [:upper:] [:lower:])"; done Also, the quote marks aren't necessary if your filenames don't contain spaces.

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