Commands using echo sorted by votes

Commands using echo (1,545)

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Process each item with multiple commands (in while loop)
This is sample output - yours may be different.
-2

find -maxdepth 1 -type d | while read dir; do echo $dir; echo cmd2; done

techie · 2013-04-29 10:15:13 6
get a random number in bash

use it to stagger cronjob or to get a random number increase the range by replacing 100 with your own max value Show Sample Output
This is sample output - yours may be different.
```
bash-4.1$ echo $[RANDOM % 100]
89
```
-2

echo $[RANDOM % 100] # range 0-99

anapsix · 2013-05-25 19:02:00 9
One command line web server on port 80 using nc (netcat)

-k, --keep-open will keep connection alive, and we could exclude using 'while true' nc is such a powerful command, it could be used instead of any OS! :p Show Sample Output
This is sample output - yours may be different.
```
/home/me> curl -i localhost:5432
HTTP/1.1 200 OK
Tue Nov 12 15:40:27 EET 2013


<p>How are you today?</p>
```
-2

nc -kl 5432 -c 'echo -e "HTTP/1.1 200 OK\r\n$(date)\r\n\r\n";echo "<p>How are you today?</p>"'

gvitalie · 2013-11-12 14:00:11 7
Programmatically partition a new disk with fdisk
This is sample output - yours may be different.
-2

(echo n; echo p; echo 3; echo 1; echo; echo; echo w; echo q) | /sbin/fdisk /dev/sda

tsener · 2014-12-04 14:57:28 9
repeat any string or char n times without spaces between
This is sample output - yours may be different.
-2

echo -e $_{1..80}'\b+'

unixmonkey74668 · 2015-05-09 10:04:44 10
Reset the last modified time for each file in a git repo to its last commit time
This is sample output - yours may be different.
-2

for file in $( git ls-files ); do echo $file; touch -t $(git --no-pager log --date=local -1 --format="%ct" $file | php -r 'echo @date( "YmdHi.s", trim( file_get_contents( "php://stdin" ) ) );') $file; done

westonruter · 2015-07-01 00:28:06 13
Muestra el crecimiento de un archivo por segundo

Muestra el crecimiento de un archivo por segundo. Cambia el texto "FILE" por el nombre del archivo a monitorear. Comando STAT
This is sample output - yours may be different.
-2

while true; do A=$(stat -c%s FILE); sleep 1; B=$(stat -c%s FILE); echo -en "\r"$(($B-$A))" Bps"; done

Zort · 2016-06-27 20:39:06 15
Flush memory cache
This is sample output - yours may be different.
-2

free && sync && echo 3 > /proc/sys/vm/drop_caches && free

ironmarc · 2016-11-02 08:51:01 23
loop files with SPACES on their names

use '*' instead of 'ls'
This is sample output - yours may be different.
-2

for f in *;do echo $f;done

famaral · 2018-09-21 14:27:23 365
small CPU benchmark with PI, bc and time.

Broken in two parts, first get the number of cores with cat /proc/cpuinfo |grep proc|wc -l and create a integer sequence with that number (xargs seq), then have GNU parallel loop that many times over the given command. Cheers! Show Sample Output
This is sample output - yours may be different.
```
...
66983895228684783123552658213144957685726243344189303968642624341077\
3226978028073189154411010446823252716201052652272111660396

real	0m31,847s
user	0m59,085s
sys	0m0,151s
```
-2

time cat /proc/cpuinfo |grep proc|wc -l|xargs seq|parallel -N 0 echo "scale=4000\; a$1$\*4" '|' bc -l

kostis · 2018-12-06 05:15:24 674
Hiding ur evil intent! Shame on you!

as a shell script, the possibilities are endless... #!/bin/bash echo doing something very evil! exit [2Aecho doing something very nice! Show Sample Output
This is sample output - yours may be different.
```
$ doing something very nice!
```
-2

echo 'doing something very evil' >/dev/null && echo doing something very nice!

LyscmdFUer · 2019-09-20 12:47:19 101
declare variable as integer
This is sample output - yours may be different.
-3

declare -i aa ; aa=3*8 ; echo $aa

jcgam69 · 2009-02-24 21:58:13 5
Removes Apple "garbage"

This is quite usefull in Unix system share via NFS or AppleTalk with OSX clients that like to populate your filesystem with these pesky files
This is sample output - yours may be different.
-3

find . -name *DS_Store -exec echo rm {} \;

dgomes · 2009-03-11 11:30:55 9
find a class or file within a number of jar files
This is sample output - yours may be different.
-3

for i in `find . | grep jar$`; do echo $i; jar tvf $i | grep 'search-string'; done;

thisduck · 2009-03-23 16:18:26 6
use a literal bang (exclamation point) in a command

Seems obvious, but other seemingly simple ways to use it don't work: echo !whammy and echo "!whammy" both output: -bash: !whammy: event not found and this: echo "\!whammy" outputs: \!whammy with the slash :( you can also do any combinations of quotes for a complex string: echo "It's great to be able to use a bang ("'!'") in a command"'!' outputs: It's great to be able to use a bang (!) in a command! Show Sample Output
This is sample output - yours may be different.
```
!whammy
```
-3

echo '!'whammy

sudopeople · 2009-03-26 23:34:33 9
Print out "string" between "match1" and "match2"

But who knows to delete the rest of the lines? I want only "string".
This is sample output - yours may be different.
-3

echo "string" | sed -e 's/.*match1//' -e 's/match2.*$//'

P17 · 2009-04-01 15:01:27 8
Join lines
This is sample output - yours may be different.
-3

echo -e "aa\nbb\ncc\ndd\n123" | sed -e :a -e "/$/N; s/\n/;/; ta"

unixmonkey3251 · 2009-04-15 16:12:00 7
Encoding with base64

Also works with files: cat file Hello world base64 file SGVsbG8gd29ybGQK To decrypt use the -d option: echo SGVsbG8gd29ybGQK | base64 -d Hello world Show Sample Output
This is sample output - yours may be different.
```
SGVsbG8gd29ybGQK
```
-3

echo "Hello world" | base64

P17 · 2009-04-27 15:00:08 16
Alternative size (human readable) of directories (biggest last)

Found this one little more for me. This one removes the perl dependency (from command 2535). Source for command : http://www.earthinfo.org/linux-disk-usage-sorted-by-size-and-human-readable/ Show Sample Output
This is sample output - yours may be different.
```
/usr/share/compiz $ duf *
4k	text.xml
8k	video.xml
12k	session.xml
40k	colorfilter.xml
92k	staticswitcher.xml
184k	shift.xml
356k	animation.xml
1M	reflection.png
```
-3

function duf { du -sk "$@" | sort -n | while read size fname; do for unit in k M G T P E Z Y; do if [ $size -lt 1024 ]; then echo -e "${size}${unit}\t${fname}"; break; fi; size=$((size/1024)); done; done; }

marssi · 2009-07-02 19:56:36 6
Copy with progress
This is sample output - yours may be different.
-3

copy(){ cp -v "$1" "$2"&watch -n 1 'du -h "$1" "$2";printf "%s%%\n" $(echo `du -h "$2"|cut -dG -f1`/0.`du -h "$1"|cut -dG -f1`|bc)';}

frozenfire · 2009-08-03 14:32:32 11
Get internal and external IP addresses

Gets the internal and external IP addresses of all your interfaces, or the ones given as arguments Show Sample Output
This is sample output - yours may be different.
```
nathan@lion:~$ ips
lo   127.0.0.1      127.0.0.1
eth0 192.168.1.2    80.106.232.129
nathan@lion:~$ ips eth0
eth0 192.168.1.2    80.106.232.129
```
-3

ips(){ for if in ${1:-$(ip link list|grep '^.: '|cut -d\ -f2|cut -d: -f1)};do cur=$(ifconfig $if|grep "inet addr"|sed 's/.*inet addr:$[0-9\.]*$.*/\1/g');printf '%-5s%-15s%-15s\n' $if $cur $(nc -s $cur sine.cluenet.org 128 2>/dev/null||echo $cur);done;}

frozenfire · 2009-08-07 10:04:46 3
Testing php configuration

http://localhost/test.php
This is sample output - yours may be different.
-3

echo "<?php phpinfo(); ?>" >> /srv/www/htdocs/test.php

userevolution · 2009-08-11 05:56:25 13
Useful if you need to see compiler errors while edit a code

If you receives a lot of compiling errors, type 'clear', then reedit your code and press "SHIFT+PGUP". Show Sample Output
This is sample output - yours may be different.
```
[marcio@localhost ~]$ alias clear='( for ((i=1;i<$LINES;i++)) ; do echo "" ; done ) ; clear'
[marcio@localhost ~]$ vi tmp.c
[marcio@localhost ~]$ gcc tmp.c 
tmp.c:1: error: parse error before "is"
shell returned 1
[marcio@localhost ~]$ clear
[marcio@localhost ~]$ vi tmp.c
[marcio@localhost ~]$ 
```
-3

alias clear='( for ((i=1;i<$LINES;i++)) ; do echo "" ; done ) ; clear'

Marcio · 2009-10-27 14:38:31 3
Get your external IP address

bash neto..
This is sample output - yours may be different.
-3

exec 3<>/dev/tcp/whatismyip.com/80; echo -e "GET /automation/n09230945.asp HTTP/1.0\r\nHost: whatismyip.com\r\n" >&3; a=( $(cat <&3) ); echo ${a[${#a[*]}-1]};

yaccovs · 2009-11-03 21:57:00 6
mkdir & cd into it as single command

combines mkdir and cd added quotes around $_, thanx to flatcap! Show Sample Output
This is sample output - yours may be different.
```
~/#$ mkcd /path/to/new/folder
/path/to/new/folder#$_
```
-3

echo 'mkcd() { mkdir -p "$@" && cd "$_"; }' >> ~/.bashrc

phaidros · 2010-01-13 09:37:56 4
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ptree equivalent in HP-UX

By setting the UNIX95 variable in HP-UX the XPG4 mode is activated, you get new options for ps and other commands, for me the best way to use this is to create an alias named ptree in root profile: alias ptree='UNIX95=1 ps -eH'

Find the package that installed a command

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"

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" }

convert pdf into multiple png files

syntax for resolution is: (see "man gs" for further informations) -rnumber -rnumber1xnumber2

Get current Xorg resolution via xrandr

Synchronise a file from a remote server

You will be prompted for a password unless you have your public keys set-up.

vi a remote file with port

If you are running sshd on different port use above this command to edit/view remote file with vi/vim. In above example I am using port 12345.

List all files in a folder in a git repository by last commit date

This lists all the files in a folder, then finds the commit date for them one by one, then sorts them from newest to oldest

Make sure a script is run in a terminal.

Exit with error if script is not run in a terminal

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Commands using echo (1,545)

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