Commands using echo sorted by votes

Commands using echo (1,545)

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I finally found out how to use notify-send with at or cron

You can write a script that does this : remind <minutes> [<message>]
This is sample output - yours may be different.
20

echo "export DISPLAY=:0; export XAUTHORITY=~/.Xauthority; notify-send test" | at now+1minute

adeverteuil · 2010-07-27 00:10:08 9
stderr in color

in case you run some command in CLI and would like to take read strerr little bit better, you can use the following command. It's also possible to grep it if necessary....
This is sample output - yours may be different.
19

mycommand 2> >(while read line; do echo -e "\e[01;31m$line\e[0m"; done)

confiq · 2010-12-30 21:42:42 19
Stamp a text line on top of the pdf pages.

To quickly add some remark, comment, stamp text, ... on top of (each of) the pages of the input pdf file.
This is sample output - yours may be different.
19

echo "This text gets stamped on the top of the pdf pages." | enscript -B -f Courier-Bold16 -o- | ps2pdf - | pdftk input.pdf stamp - output output.pdf

svg · 2012-01-03 14:58:10 11
Quickly generate an MD5 hash for a text string using OpenSSL

Thanks to OpenSSL, you can quickly and easily generate MD5 hashes for your passwords. Alternative (thanks to linuxrawkstar and atoponce): echo -n 'text to be encrypted' | md5sum - Note that the above method does not utlise OpenSSL. Show Sample Output
This is sample output - yours may be different.
```
8df639b301a1e10c36cc2f03bbdf8863
```
18

echo -n 'text to be encrypted' | openssl md5

Zenexer · 2009-03-18 00:11:46 12
Create a list of binary numbers

If you should happen to find yourself needing some binary numbers, this is a quickie way of doing it. If you need more digits, just add more "{0..1}" sequences for each digit you need. You can assign them to an array, too, and access them by their decimal equivalent for a quickie binary to decimal conversion (for larger values it's probably better to use another method). Note: this works in bash, ksh and zsh. For zsh, though, you'll need to issue a setopt KSH_ARRAYS to make the array zero-based. binary=({0..1}{0..1}{0..1}{0..1}) echo ${binary[9]} Show Sample Output
This is sample output - yours may be different.
```
0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111
```
18

echo {0..1}{0..1}{0..1}{0..1}

dennisw · 2009-06-23 17:30:20 11
Triple monitoring in screen

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: http://www.softpanorama.org/Utilities/Screen/screenrc_examples.shtml
This is sample output - yours may be different.
18

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 11
Convert text to picture

generates a picture file with the text. Some other samples in: http://www.imagemagick.org/Usage/text/ Show Sample Output
This is sample output - yours may be different.
```
the file text.gif is generated with the text.
```
18

echo -e "Some Text Line1\nSome Text Line 2" | convert -background none -density 196 -resample 72 -unsharp 0x.5 -font "Courier" text:- -trim +repage -bordercolor white -border 3 text.gif

glaudiston · 2010-02-25 18:58:42 32
send a circular
This is sample output - yours may be different.
18

echo "dear admin, please ban eribsskog" | wall

winky · 2010-12-27 09:45:23 8
convert from hexidecimal or octal to decimal

Bash can accept '0x' and '0' notation for hexidecimal and octal numbers, so you just have to output the values. Show Sample Output
This is sample output - yours may be different.
```
510 27
```
18

echo $((0x1fe)) $((033))

Mozai · 2011-12-06 02:00:42 15
Unbelievable Shell Colors, Shading, Backgrounds, Effects for Non-X

I've been using linux for almost a decade and only recently discovered that most terminals like putty, xterm, xfree86, vt100, etc., support hundreds of shades of colors, backgrounds and text/terminal effects. This simply prints out a ton of them, the output is pretty amazing. If you use non-x terminals all the time like I do, it can really be helpful to know how to tweak colors and terminal capabilities. Like: echo $'\33[H\33[2J'
This is sample output - yours may be different.
17

for c in `seq 0 255`;do t=5;[[ $c -lt 108 ]]&&t=0;for i in `seq $t 5`;do echo -e "\e[0;48;$i;${c}m|| $i:$c `seq -s+0 $(($COLUMNS/2))|tr -d '[0-9]'`\e[0m";done;done

AskApache · 2009-11-03 09:12:13 9
Visit wikileaks.com

Who needs a DNS server Show Sample Output
This is sample output - yours may be different.
```
root@nostromo:~# w3m wikileaks.com
...
```
17

echo 213.251.145.96 wikileaks.com >>/etc/hosts

schmiddim · 2010-12-10 17:47:38 6
Convert seconds into minutes and seconds

This is a very simple way to input a large number of seconds and get a more useful value in minutes and seconds. Show Sample Output
This is sample output - yours may be different.
```
 04 59
```
17

echo 'obase=60;299' | bc

unixmonkey3280 · 2011-10-21 07:55:30 8
Show git branches by date - useful for showing active branches

Print out list of all branches with last commit date to the branch, including relative time since commit and color coding. Show Sample Output
This is sample output - yours may be different.
```
2009-06-03 12:21:35 +0900 3 hours ago	add_cool_functionality
2009-06-02 16:15:13 +0900 24 hours ago	remove_strange_bug
2009-06-02 16:12:20 +0900 24 hours ago	implement_observer
2009-06-02 14:42:58 +0900 25 hours ago	experiment_with_bobcat_feature
```
16

for k in `git branch|perl -pe s/^..//`;do echo -e `git show --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $k|head -n 1`\\t$k;done|sort -r

brunost · 2009-06-03 08:25:00 309
run command on a group of nodes in parallel

The pee command is in the moreutils package.
This is sample output - yours may be different.
16

echo "uptime" | pee "ssh host1" "ssh host2" "ssh host3"

dooblem · 2010-08-20 11:42:40 9
Figure out what shell you're running
This is sample output - yours may be different.
16

echo $0

chmurli · 2011-02-05 16:42:48 13
Show directories in the PATH, one per line

This version uses Pipes, but is easier for the common user to grasp... instead of using sed or some other more complicated method, it uses the tr command Show Sample Output
This is sample output - yours may be different.
```
/usr/lib/qt-3.3/bin
/usr/kerberos/bin
/usr/lib/ccache
/usr/local/bin
/usr/bin
/bin
/usr/local/sbin
/usr/sbin
.... (and so on)
```
15

echo $PATH | tr \: \\n

crk · 2009-09-09 02:10:04 12
a shell function to print a ruler the width of the terminal window.
This is sample output - yours may be different.
15

ruler() { for s in '....^....|' '1234567890'; do w=${#s}; str=$( for (( i=1; $i<=$(( ($COLUMNS + $w) / $w )) ; i=$i+1 )); do echo -n $s; done ); str=$(echo $str | cut -c -$COLUMNS) ; echo $str; done; }

bartonski · 2010-01-28 19:25:25 22
run command on a group of nodes in parallel
This is sample output - yours may be different.
15

echo "uptime" | tee >(ssh host1) >(ssh host2) >(ssh host3)

gutoyr · 2010-08-20 16:22:57 8
pretend to be busy in office to enjoy a cup of coffee

This will turn it in an infinite loop and also shows random words from a file, so it won't be the same each time and also not just a number.
This is sample output - yours may be different.
15

j=0;while true; do let j=$j+1; for i in $(seq 0 20 100); do echo $i;sleep 1; done | dialog --gauge "Install part $j : `sed $(perl -e "print int rand(99999)")"q;d" /usr/share/dict/words`" 6 40;done

houghi · 2010-10-08 12:12:00 9
Watch RX/TX rate of an interface in kb/s

Just a simple way without the need of additional tools. Of course, replace eth0 with your IF. Show Sample Output
This is sample output - yours may be different.
```
in:   4.1e+03           out:        88
```
15

while [ /bin/true ]; do OLD=$NEW; NEW=`cat /proc/net/dev | grep eth0 | tr -s ' ' | cut -d' ' -f "3 11"`; echo $NEW $OLD | awk '{printf("\rin: % 9.2g\t\tout: % 9.2g", ($1-$3)/1024, ($2-$4)/1024)}'; sleep 1; done

hons · 2011-03-22 10:02:23 8
Color man pages

Add the followin to ~/.bashrc #colour export LESS_TERMCAP_mb=$'\E[01;31m' export LESS_TERMCAP_md=$'\E[01;37m' export LESS_TERMCAP_me=$'\E[0m' export LESS_TERMCAP_se=$'\E[0m' export LESS_TERMCAP_so=$'\E[01;44;33m' export LESS_TERMCAP_ue=$'\E[0m' export LESS_TERMCAP_us=$'\E[01;32m'
This is sample output - yours may be different.
15

echo "export LESS_TERMCAP_mb=$'\E[01;31m'" >> ~/.bashrc

totti · 2011-10-20 17:34:14 8
HourGlass

Displays an animated hourglass for x amount of seconds Show Sample Output
This is sample output - yours may be different.
```
|\-/
```
15

hourglass(){ trap 'tput cnorm' 0 1 2 15 RETURN;local s=$(($SECONDS +$1));(tput civis;while (($SECONDS<$s));do for f in '|' '\' '-' '/';do echo -n "$f";sleep .2s;echo -n $'\b';done;done;);}

AskApache · 2012-06-21 05:40:22 143
Validate and pretty-print JSON expressions.

You can use a site like http://www.jsonlint.com/ or use the command line to validate your long and complex json data. This is part of the simplejson package for python http://undefined.org/python/#simplejson. Wrong json expression example: echo '{ 1.2:3.4}' | python -m simplejson.tool Expecting property name: line 1 column 2 (char 2) Show Sample Output
This is sample output - yours may be different.
```
{
    "json": "obj"
}
```
14

echo '{"json":"obj"}' | python -m simplejson.tool

azeey · 2009-05-10 13:58:05 16
urldecoding

echo "http%3A%2F%2Fwww.google.com" | sed -e's/%$[0-9A-F][0-9A-F]$/\\\\\x\1/g' | xargs echo -e http://www.google.com Works under bash on linux. just alter the '-e' option to its corresponding equivalence in your system to execute escape characters correctly.
This is sample output - yours may be different.
14

sed -e's/%$[0-9A-F][0-9A-F]$/\\\\\x\1/g' | xargs echo -e

mohan43u · 2009-05-25 05:37:44 41
Show directories in the PATH, one per line

Shorter version. Show Sample Output
This is sample output - yours may be different.
```
/usr/bin
/bin
/usr/sbin
/sbin
/usr/local/bin
```
14

echo "${PATH//:/$'\n'}"

camspiers · 2009-08-26 23:12:05 9
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Extract public key from private

This will extract the public key that is stored in the private key using openssl.

Convert entire audio library in parallel

Uses parallel processing Reiteration of my earlier command https://www.commandlinefu.com/commands/view/15246/convert-entire-music-library Usage lc Old_Directory New_DIrectory Old_Format New_Format lc ~/Music ~/Music_ogg mp3 ogg

Upload images to omploader.org from the command line.

This function uploads images to http://omploader.org and then prints out the links to the file. Some coloring can also be added to the command with: $ompload() { curl -F file1=@"$1" http://omploader.org/upload|awk '/Info:|File:|Thumbnail:|BBCode:/{gsub(/

Securely destroy data (including whole hard disks)

GNU shred is provided by the coreutils package on most Linux distribution (meaning, you probably have it installed already), and is capable of wiping a device to DoD standards. You can give shred any file to destroy, be it your shell history or a block device file (/dev/hdX, for IDE hard drive X, for example). Shred will overwrite the target 25 times by default, but 3 is enough to prevent most recovery, and 7 passes is enough for the US Department of Defense. Use the -n flag to specify the number of passes, and man shred for even more secure erasing fun. Note that shredding your shell history may not be terribly effective on devices with journaling filesystems, RAID copies or snapshot copies, but if you're wiping a single disk, none of that is a concern. Also, it takes quite a while :)

convert uppercase files to lowercase files

RTFM function

Some commands have more information on 'info' than in the man pages

Show the command line for a PID with ps

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Create strong, but easy to remember password

Why remember? Generate! Up to 48 chars, works on any unix-like system (NB: BSD use md5 instead of md5sum)

How to extract 5000 records from each table in MySQL

How to extract data from one table: mysqldump --opt --where="true LIMIT 5000" dbinproduzione tabella > miodbditest_tabella.sql

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Commands using echo (1,545)

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