Commands using watch sorted by votes

Commands using watch (155)

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Show current folder that is searched by find command
This is sample output - yours may be different.
0

watch readlink -f /proc/$(pidof find)/cwd

niltonvasques · 2015-07-19 12:26:43 9
This command watches the top 10 processes currently taking up the most memory with thread & other info, incase you don't want to use the TOP or HTOP command.

This is a alternate command I like to use instead of TOP or HTOP to see what are the processes which are taking up the most memory on a system. It shows the username, process ID, CPU usage, Memory usage, thread ID, Number of threads associated with parent process, Resident Set Size, Virtual Memory Size, start time of the process, and command arguments. Then it's sorted by memory and showing the top 10 with head. This of course can be changed to suit you needs. I have a small system which is why Firefox is taking so much resources. Show Sample Output
This is sample output - yours may be different.
```
Every 0.8s: ps -eaLo uname,pid,pcpu,pmem,lwp,nlwp,rss,vsz,start_time,args --sort -pmem| head -10                 Tue May 10 21:02:16 2016

USER       PID %CPU %MEM   LWP NLWP   RSS    VSZ START COMMAND
ubercoo    20870 20.1 43.3 20870   48 388144 1660272 May09 /usr/lib/firefox/firefox
ubercoo    20870  0.0 43.3 20889   48 388144 1660272 May09 /usr/lib/firefox/firefox
ubercoo    20870  0.0 43.3 20890   48 388144 1660272 May09 /usr/lib/firefox/firefox
ubercoo    20870  0.5 43.3 20891   48 388144 1660272 May09 /usr/lib/firefox/firefox
ubercoo    20870  0.1 43.3 20893   48 388144 1660272 May09 /usr/lib/firefox/firefox
ubercoo    20870  0.1 43.3 20894   48 388144 1660272 May09 /usr/lib/firefox/firefox
ubercoo    20870  0.1 43.3 20895   48 388144 1660272 May09 /usr/lib/firefox/firefox
ubercoo    20870  0.1 43.3 20896   48 388144 1660272 May09 /usr/lib/firefox/firefox
ubercoo    20870  0.1 43.3 20897   48 388144 1660272 May09 /usr/lib/firefox/firefox
```
0

watch -n .8 'ps -eaLo uname,pid,pcpu,pmem,lwp,nlwp,rss,vsz,start_time,args --sort -pmem| head -10'

ubercoo · 2016-05-11 01:05:53 11
Monitor Wireless Adapter Stats

Monitors basic wireless interface statistics, such as signal strength and discarded packets. The watch command's -n parameter sets a refresh rate of every 1 second. Show Sample Output
This is sample output - yours may be different.
```
Inter-| sta-|   Quality        |   Discarded packets               | Missed | WE
 face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon | 22
 wlan0: 0000   58.  -52.  -256        0      0      0    449    540        0
```
0

watch -n 1 cat /proc/net/wireless

1nF1D3L · 2016-09-04 02:44:51 16
Watch top 10 processes sorted by cpu usage
This is sample output - yours may be different.
0

watch "ps aux | sort -nrk 3,3 | head -n 10"

sidneycrestani · 2016-11-20 02:43:41 15
Watch active calls on an Asterisk PBX
This is sample output - yours may be different.
0

watch -n 5 "asterisk -rx 'core show calls' | grep active"

vperalta · 2017-02-14 15:05:44 16
Watch Processes with D status (sleep and wait for IO)
This is sample output - yours may be different.
0

watch -n 1 "(ps aux | awk '\$8 ~ /D/ { print \$0 }')"

ara4sh · 2017-04-15 10:39:02 18

Watch all postgres processes, sorted by memory use

Continuously watches postgres, showing the instances using the most RAM at the top. Show Sample Output

watch -n 1 '{ ps aux | head -n 1; ps aux --sort -rss | grep postgres | grep -v grep; } | cat'

carbocation · 2017-05-14 17:01:44 16

Shows live outboud connection attempts and/or suceess, refreshing every 0.5 seconds

This is very handy for troubleshooting apps connection to internet. Shows an app's outgoing ip/port before and after connection established. Run this command and init the app you're investigating. I used that when trying to understand what is the destination's ip/port needed to open in firewall, for a specific VPN app. Similar for windows cmd: netstat -nafo | find /v "LISTENING" | find /v "0.0.0.0" | find /v "127.0.0.1"
This is sample output - yours may be different.
0

watch -n0.5 -d "netstat -nafo | grep -v -E 'LISTENING|0.0.0.0|127.0.0.1|\[::\]:|\[::1\]:'"

odedode4 · 2018-01-29 11:01:30 21
Monitor ElasticSearch cluster health - Useful for keeping an eye on ES when rebalancing takes place
This is sample output - yours may be different.
0

watch -n 1 curl -XGET 'http://localhost:9200/_cluster/health?pretty=true'

jmarek · 2018-06-17 15:58:39 336

OMG, you are a Gentoo junkie. -funroll-loops-me-harder ;-) http://ccache.samba.org/ ccache is a compiler cache, which speeds up your compiler on successive runs, because it caches intermediate compiled output. Show Sample Output

-1

watch ccache -s

piyo · 2009-02-13 17:16:32 13

Watch mysql processlist on a remote host

Locally watch MySQL process list update every 5s on a remote host. While you watch pipe to a file. The file out put is messy though but hey at least you have a history of what you see.
This is sample output - yours may be different.
-1

watch -n 0.5 ssh [user]@[host] mysqladmin -u [mysql_user] -p[password] processlist | tee -a /to/a/file

lunarblu · 2009-08-19 14:21:27 6
bash function to check for something every 5 seconds

Every seconds do Show Sample Output
This is sample output - yours may be different.
```
Every 10,0s: ls /tmp                           Fri Sep  4 19:19:11 2009
...
<list of files>
```
-1

watch -n <seconds> <command>

aonick · 2009-09-04 15:19:42 3
keep an eye on system load changes
This is sample output - yours may be different.
-1

watch -n 7 -d 'uptime | sed s/.*users?, //'

matthewbauer · 2010-01-17 18:45:52 4
Console clock
This is sample output - yours may be different.
-1

watch -n1 echo

rubenmoran · 2011-02-10 08:55:09 10
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
This is sample output - yours may be different.
```
      3 CLOSE-WAIT
      1 CLOSING
   1013 ESTAB
      6 FIN-WAIT-1
     29 FIN-WAIT-2
     20 LISTEN
      1 State
    323 TIME-WAIT
```
-1

watch "ss -nat | awk '"'{print $1}'"' | sort | uniq -c"

ricardofunke · 2012-12-07 19:07:33 9
stream facebook feed

Streams your timeline on the commandline, required fbcmd https://github.com/dtompkins/fbcmd
This is sample output - yours may be different.
-1

watch -n -0.1 fbcmd stream timeline

hako · 2013-04-20 17:36:18 12
A simple overview of memory usage refreshed at user designated intervals.

This command shows a high level overview of system memory and usage refreshed in seconds. Change -n 10 to you desired refresh interval. Show Sample Output
This is sample output - yours may be different.
```
Every 10.0s: free -m                                                                   Fri Jan  3 15:58:44 2014

             total       used       free     shared    buffers     cached
Mem:         12001       3565       8435          0        268       1613
-/+ buffers/cache:       1682      10318
Swap:         1951          0       1951
```
-1

watch -n 10 free -m

Darkstar · 2014-01-04 10:10:15 13
Display clock in terminal

'watch' repeatedly (default every 2 seconds, -n 1 => every second) runs a command (here ':', a shorthand for 'true'), displays the output (here nothing) and the date and time of the last run. I thought it to be obvious but it seemingly is not: to exit use Ctrl-C.
This is sample output - yours may be different.
-2

watch -n 1 :

penpen · 2009-03-25 23:00:28 6
easly monitor mem usage
This is sample output - yours may be different.
-2

watch -n1 --differences cat /proc/meminfo

hypnojazz · 2009-03-26 15:27:37 9
Not so simple countdown from a given date

An improved version of http://www.commandlinefu.com/commands/view/1772/simple-countdown-from-a-given-date that uses Perl to pretty-print the output. Note that the GNU-style '--no-title' option has been replaced by its one-letter counterpart '-t'. Show Sample Output
This is sample output - yours may be different.
```
4d 23:15:43
```
-2

watch -tn1 'bc<<<"`date -d'\''friday 21:00'\'' +%s`-`date +%s`"|perl -ne'\''@p=gmtime($_);printf("%dd %02d:%02d:%02d\n",@p[7,2,1,0]);'\'

penpen · 2009-03-29 19:53:36 8
Monitor the Kernel Ring Buffer

Useful with new unknown devices or just monitoring, probably useful for the sysadmin. Updates every 2 seconds. More here: http://linuxclisecurity.blogspot.com/2009/12/monitor-kernel-ring-buffer.html.
This is sample output - yours may be different.
-2

watch 'dmesg | tail -15'

Heoa · 2009-12-20 02:00:05 4
big countdown clock with hours, minutes and seconds

Change HH:MM with your target time. This is for a Debian/Ubuntu GNU system. You need bash (package bash), date (package coreutils) and toilet (package toilet). Install with: # apt-get install bash coreutils toilet toilet-fonts
This is sample output - yours may be different.
-2

watch -tn1 'date -u +%T -d @$(expr $(date -d HH:MM +%s) - $(date +%s)) | toilet -f bigmono12'

prayer · 2010-06-26 11:56:11 4
Watch for blocked NGINX processes for tuning purposes

This command counts the number of blocked NGINX processes every 2 seconds and shows the last 22 measurements You should have at least the number of cpu's in a non-blocked state. The command up to the first ; truncates the log file. Show Sample Output
This is sample output - yours may be different.
```
Every 2.0s: ps up 16902,16903,16904,16905,16906,16907,16908,16909,16910,16911,1...  Wed Mar 16 17:49:08 2011

0
0
0
0
0
0
0
0
0
```
-2

> /tmp/psup.log; watch "ps up $(pgrep -d, -x nginx) | grep -v STAT | awk '{print $8}' | grep -c [ZUTD] >> /tmp/psup.log; tail -n 22 /tmp/psup.log"

donnoman · 2011-03-16 17:49:23 4
Displaying wireless signal on screen in realtime.
This is sample output - yours may be different.
-2

watch -n 1 "awk 'NR==3 {print \"Signal strength = \" \$3 \"00 %\"}''' /proc/net/wireless"

jlaunay · 2012-06-07 11:00:56 9
Show who is logged on and find out what they are doing
This is sample output - yours may be different.
-2

watch w

techie · 2013-05-07 15:02:41 11
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Print a row of characters across the terminal

Pure Bash This will print a row of characters the width of the screen without using any external executables. In some cases, COLUMNS may not be set. Here is an alternative that uses tput to generate a default if that's the case. And it still avoids using tr. $ printf -v row "%${COLUMNS:-$(tput cols)}s"; echo ${row// /#} The only disadvantage to either one is that they create a variable.

Unaccent an entire directory tree with files.

This command changes all filename and directories within a directory tree to unaccented ones. I had to do this to 'sanitize' some samba-exported trees. The reason it works might seem a little difficult to see at first - it first reverses-sort by pathname length, then it renames only the basename of the path. This way it'll always go in the right order to rename everything. Some notes: 1. You'll have to have the 'unaccent' command. On Ubuntu, just aptitude install unaccent. 2. In this case, the encoding of the tree was UTF-8 - but you might be using another one, just adjust the command to your encoding. 3. The program might spit a few harmless errors saying the files are the same - not to fear.

mtr, better than traceroute and ping combined

mtr combines the functionality of the traceroute and ping programs in a single network diagnostic tool. As mtr starts, it investigates the network connection between the host mtr runs on and HOSTNAME. by sending packets with purposly low TTLs. It continues to send packets with low TTL, noting the response time of the intervening routers. This allows mtr to print the response percentage and response times of the internet route to HOSTNAME. A sudden increase in packetloss or response time is often an indication of a bad (or simply over‐loaded) link.

tar.gz with gpg-encryption on the fly

Create a encrypted tar.gz file from a directory on the fly. The encryption is done by GPG with a public key. The resulting filename is tagged with the date of creation. Very usefull for encrypted snapshots of folders.

Print number of mb of free ram

Create .pdf from .doc

sudo apt-get install cups-pdf

Compare two directory trees.

Perform a C-style loop in Bash.

Print 0 through 99, each on a separate line.

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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Commands using watch (155)

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