Commands using sleep sorted by votes

Commands using sleep (289)

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Watch RX/TX rate of an interface in kb/s

A shorter version Show Sample Output
This is sample output - yours may be different.
```
in:    462.78           out:     11.38
```
1

while cat /proc/net/dev; do sleep 1; done | awk '/eth0/ {o1=n1; o2=n2; n1=$2; n2=$10; printf "in: %9.2f\t\tout: %9.2f\r", (n1-o1)/1024, (n2-o2)/1024}'

quadcore · 2011-03-26 02:52:14 3
monitor your CPU core temperatures in real time

Watch the temperatures of your CPU cores in real time at the command line. Press CONTROL+C to end. GORY DETAILS: Your computer needs to support sensors (many laptops, for example, do not). You'll need to install the lm-sensors package if it isn't already installed. And it helps to run the `sensors-detect` command to set up your sensor kernel modules first. At the very end of the sensors-detect interactive shell prompt, answer YES to add the new lines to the list of kernel modules loaded at boot. Show Sample Output
This is sample output - yours may be different.
```
Core 0:      +52.0?C
Core 1:      +60.0?C
Core 2:      +53.0?C
Core 3:      +52.0?C
```
1

while :; do sensors|grep ^Core|while read x; do printf '% .23s\n' "$x"; done; sleep 1 && clear; done;

linuxrawkstar · 2011-04-20 06:41:57 7
Take a screenshot every 2 seconds

Take a screenshot every 2 seconds and save it as a png file
This is sample output - yours may be different.
1

i=0;while :; do i=$(expr "$i" + 1); scrot "$i".png; sleep 2; done;

scripteles · 2011-05-27 00:25:28 3
Automatically connect to a host with ssh once it is online
This is sample output - yours may be different.
1

var=host ;while ! nc -zw 1 $var 22;do sleep 1; done ; ssh user@$var

Pieton217 · 2011-06-22 21:07:57 3
Use acpi and notify-send to report current temperature every five minutes.

Use acpi and notify-send to report current temperature every five minutes. Works best in a shell script run at startup. acpi is called for temperature and fed to notify-send for a tooltip. After waiting five minutes, it will start over.
This is sample output - yours may be different.
1

while notify-send "`acpi -t`"; do sleep 300; done

unixmonkey8046 · 2011-07-05 18:22:06 3
shut of the screen ( Fool proof )

Use the command to create a script and bind it to a key using keyboard shortcut. eg: Script locks the screen in a loop until the command is executed again.At first it
This is sample output - yours may be different.
1

switchMonitor () { LF=/tmp/screen-lock; if [ -f $LF ]; then rm $LF; else touch $LF; sleep .5; while [ -f $LF ]; do xset dpms force off; sleep 2; done; fi };

totti · 2011-08-26 17:55:44 6
Displays the number of unread messages on your gmail at the top right corner of your terminal

Checks your gmail account every 30 seconds and display the number of new messages in the top right corner of the terminal. A kind of CLI "Gmail notifier" if you will. :-) This is a mashup of http://www.commandlinefu.com/commands/view/7916/put-a-console-clock-in-top-right-corner and http://www.commandlinefu.com/commands/view/3386/check-your-unread-gmail-from-the-command-line
This is sample output - yours may be different.
1

while sleep 30; do tput sc;tput cup 0 $(($(tput cols)-15));echo -n " New Emails: $(curl -u username:password --silent https://mail.google.com/mail/feed/atom | grep 'fullcount' | grep -o '[0-9]\+')";tput rc; done &

saze · 2011-09-07 08:40:28 8
Emergency Alien Invasion Warning

When aliens invade Earth, be first to warn your neighbours by placing your computer screen at a window and executing this potentially Earth-saving command. Ctrl C when aliens are defeated.
This is sample output - yours may be different.
1

while true; do xset dpms force off; sleep 0.3; xset dpms force on; xset s reset; sleep 0.3; done

Escher · 2011-09-07 21:55:41 6

In this case it runs the command 'curl localhost:3000/site/sha' waiting the amount of time in sleep, ie: 1 second between runs, appending each run to the console. This works well for any command where the output is less than your line width This is unlike watch, because watch always clears the display. Show Sample Output

while true ; do echo -n "`date`";curl localhost:3000/site/sha;echo -e;sleep 1; done

donnoman · 2011-10-14 21:00:41 7

Get number of users on a minecraft server

I'm flat-out surprised that minecraft directory services require servers install multiple modifications to their server code, when the directories could fetch this information on their own. Show Sample Output
This is sample output - yours may be different.
```
users: 12/30
```
1

(echo -e '\xfe'; sleep 1) |telnet -L $HOSTIP 25565 2>/dev/null |awk -F'\xa7' '$2 {print "users: "$2"/"$3;}'

Mozai · 2011-11-07 02:28:03 7
Watch the progress of 'dd'

The previously-posted one-liner didn't work for me for whatever reason, so I ended up doing this instead.
This is sample output - yours may be different.
1

dd if=/dev/urandom of=file.img bs=4KB& sleep 1 && pid=`pidof dd`; while [[ -d /proc/$pid ]]; do kill -USR1 $pid && sleep 10 && clear; done

unixmonkey31714 · 2012-02-23 01:45:53 3
Slow down IO heavy process

Some IO intensive process make the system unresponsive. This function periodically starts/stops a process, which hopefully releases some resources for other activities. This function is useful when ionice is not available Show Sample Output
This is sample output - yours may be different.
```
bash> cp /tmp/BIG /tmp/2 & slow $!
[1] 26494
[2] 26495
```
1

slow () { [ -n $1 ] && while ps -p $1 >/dev/null ; do kill -STOP $1; sleep 1; kill -CONT $1; sleep 1; done & }

igorfu · 2012-05-16 12:13:30 3
shutdown if wget exit
This is sample output - yours may be different.
1

while pgrep wget || sudo shutdown -P now; do sleep 1m; done

kev · 2012-05-20 17:49:56 7
Create a continuous digital clock in Linux terminal

Same effect, only shell commands. Show Sample Output
This is sample output - yours may be different.
```
15:25:31
```
1

while [ 1 ] ; do echo -en "$(date +%T)\r" ; sleep 1; done

brx75x · 2012-10-01 13:25:49 4
Print the current time on the whole screen, updated every second

http://www.joachim-breitner.de/projects#screen-message now also supports reading stdin continuously to update what it shows, different ?slides? separated by a form feed character. Here, we feed the current time into it each second to create a large clock.
This is sample output - yours may be different.
1

while(true); do printf "%s\f" $(date +%T); sleep 1; done | sm -

claudius · 2013-01-14 17:13:34 6
Automatically skip bad songs in your MPD playlist.

Case insensitive. Also you can pull in the songs from a blacklist, one per line - while :; do (mpc current | grep -i -f blacklist.txt && mpc next); sleep 5; done
This is sample output - yours may be different.
1

while :; do (mpc current | grep -i nickleback && mpc next); sleep 5; done

moopet · 2013-01-15 13:27:20 4
diff process output

Execute a process or list of commands in the given interval and output the difference in output. Show Sample Output
This is sample output - yours may be different.
```
totti@totti-laptop:~$ diffprocess date +%s
1c1
< 1359103168
---
> 1359103171
```
1

diffprocess () { diff <($*) <(sleep 3; $*); }

totti · 2013-01-25 08:46:41 5
Continuously show wifi signal strength on a mac

The closer to zero the better.Credit to TheSeb on macrumors: http://forums.macrumors.com/showthread.php?t=1289884 Show Sample Output
This is sample output - yours may be different.
```
     agrCtlRSSI: -73
     agrCtlRSSI: -73
     agrCtlRSSI: -73
     agrCtlRSSI: -73
     agrCtlRSSI: -75
     agrCtlRSSI: -75
     agrCtlRSSI: -75
```
1

while i=1; do /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -I | grep CtlRSSI; sleep 0.5; done

gjuk · 2013-01-31 00:27:33 7
Run a command when a file is changed
This is sample output - yours may be different.
1

while :; do n=$(md5 myfile); if [ "$h" != "$n" ]; then h=$n; scp myfile myserver:mydir/myfile; fi; sleep 1; done

MagisterQuis · 2013-04-08 22:23:17 8
check the status of 'dd' in progress (OS X)

While a dd is running in one terminal, open another and enter the while loop. The sample output will be displayed in the window running the dd and the while loop will exit when the dd is complete. It's possible that a "sudo" will need to be inserted before "pkill", depending on your setup, for example: while pgrep ^dd; do sudo pkill -INFO dd; sleep 10; done Show Sample Output
This is sample output - yours may be different.
```
2427+0 records in
2426+0 records out
2543845376 bytes transferred in 313.465401 secs (8115235 bytes/sec)
```
1

while pgrep ^dd; do pkill -INFO dd; sleep 10; done

sternebrau · 2014-01-28 03:09:25 6
Let keyboard LED blink
This is sample output - yours may be different.
1

for a in $(seq 15); do (xset led 3);(xset -led 3);sleep .9;done

knoppix5 · 2014-07-28 19:17:01 8

Stoppable sleep

A nice way to interrupt a sleep with a signal. Show Sample Output

sleep 10 & wait $!

yorkou · 2014-09-25 13:33:51 8

Use socat to emulate an SMTP mail SERVER

Lots of scripts show you how to use socat to send an email to an SMTP server; this command actually emulates an SMTP server! It assumes the client is only sending to one recipient, and it's not at all smart, but it'll capture the email into a log file and the client will stop retrying. I used this to diagnose what emails were being sent by cron and subsequently discarded, but you can use it for all sorts of things. Show Sample Output
This is sample output - yours may be different.
```
EHLO host.example.com
MAIL FROM:<root@example.com>
RCPT TO:<root@example.com>
DATA
Received: by host.example.com (Postfix, from userid 1234)
	id 955; Wed, 26 Nov 2014 12:56:03 -0800 (PST)
From: root@example.com (Cron Daemon)
To: root@example.com
Subject: Cron <root@example.com>    
Content-Type: text/plain; charset=UTF-8
Message-Id: <2014112.57348E5@host.example.com>
Date: Wed, 26 Nov 2014 12:56:01 -0800 (PST)

foobar: cannot remove user's mustache.
.
QUIT
```
1

socat TCP4-LISTEN:25,fork EXEC:'bash -c \"echo 220;sleep 1;echo 250;sleep 1;echo 250;sleep 1;echo 250;sleep 1;echo 354;sleep 1;echo 250; timeout 5 cat >> /tmp/socat.log\"'

pfudd · 2014-11-26 21:14:05 15
Monitor system load and print out top offending processes

This checks the system load every second and if it's over a certain threshold (.8 in this example), it spits out the date, system loads and top 4 processes sorted by CPU. Additionally, the \a in the first echo creates an audible bell.
This is sample output - yours may be different.
1

while sleep 1; do if [ $(echo "$(cat /proc/loadavg | cut -d' ' -f1) > .8 " | bc) -gt 0 ]; then echo -e "\n\a"$(date)" \e[5m"$(cat /proc/loadavg)"\e[0m"; ps aux --sort=-%cpu|head -n 5; fi; done

tyzbit · 2014-12-08 15:44:40 8
Alert on high ping to know if it's really laggy while playing

Online games have pretty good lag compensation nowadays, Sometimes though, you really want to get some warning about your latency, e.g. while playing Diablo III in Hardcore mode, so you know when to carefully quit the game b/c your flatmate started downloading all his torrents at once. This is done on Darwin. On Linux/*nix you would need to find another suitable command instead of `say` to spell out your latency. And I used fping because it's a little bit easier to get the latency value needed. Something similar with our regular ping command could look like this: while :; do a=$(ping -c1 google.com | grep -o 'time.*' | cut -d\= -f2 | cut -d\ -f1 | cut -b1-4); [[ $a > 40 ]] && say "ping is $a"; sleep 3; done
This is sample output - yours may be different.
1

while :; do a=$(fping -e google.de | grep -o '[0-9]+.[0-9]+'); [[ $a > 40 ]] && say "ping is $a"; sleep 3; done

rxw · 2015-09-21 02:14:02 40
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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" }

List dot-files and dirs, but not . or ..

Files extension change

Changing a file extension to a new one for all files in a directory.

Count lines of code across multiple file types, sorted by least amount of code to greatest

The same as the other two alternatives, but now less forking! Instead of using '\;' to mark the end of an -exec command in GNU find, you can simply use '+' and it'll run the command only once with all the files as arguments. This has two benefits over the xargs version: it's easier to read and spaces in the filesnames work automatically (no -print0). [Oh, and there's one less fork, if you care about such things. But, then again, one is equal to zero for sufficiently large values of zero.]

In (any) vi, add a keystroke to format the current paragraph.

That goes into your $HOME/.exrc file. " Nice macro to reformat lines: map ^A !}fmt Note that the ^A has to be input by typing ^V^A.

Show UDID of iPhone

Display the serial of the iPhone (aka UDID).

Prepend a text to a file.

Using the sed -i (inline), you can replace the beginning of the first line of a file without redirecting the output to a temporary location.

Find Duplicate Files (based on MD5 hash) -- For Mac OS X

This works on Mac OS X using the `md5` command instead of `md5sum`, which works similarly, but has a different output format. Note that this only prints the name of the duplicates, not the original file. This is handy because you can add `| xargs rm` to the end of the command to delete all the duplicates while leaving the original.

Get full URL via http://untr.im/api/ajax/api

Get full url via untr.im

Unix alias for date command that lets you create timestamps in ISO 8601 format

I often need to add a timestamp to a file, but I never seem to remember the exact format string that has to be passed to the date command to get a compact datetime string like 20090220T231410 (i.e yyyymmddThhmmss, the ISO 8601 format popular outside the US)

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Commands using sleep (289)

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