Commands using echo sorted by votes

Commands using echo (1,545)

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Remount all NFS mounts on a host

`mount -o remount` doesn't pick up new NFS options (eg. timeo, soft, retrans, etc) so you need to do a full mount/remount cycle. This one-liner makes it quick and easy :) Update your fstab with the new options, then run it. Show Sample Output
This is sample output - yours may be different.
```
/mnt/foo
ok :)
/mnt/bar
ok :)
```
0

for P in $(mount | awk '/type nfs / {print $3;}'); do echo $P; sudo umount $P && sudo mount $P && echo "ok :)"; done

amatix · 2012-10-14 22:39:58 4
Display EPOCH time in human readable format using AWK.
This is sample output - yours may be different.
0

echo 1268727836 | awk '{print strftime("%c",$1)}'

omatictost · 2012-10-25 15:39:08 5
Print a single character from a string with AWK.
This is sample output - yours may be different.
0

echo "abcdefg"|awk 'BEGIN {FS="''"} {print $2}'

omatictost · 2012-10-25 16:12:28 11
Sort I/O activity by PID number.
This is sample output - yours may be different.
0

for i in $(ps -eo pid|grep -v PID);do echo ""; echo -n "==$i== ";awk '/^read|^write/{ORS=" "; print}' /proc/$i/io 2>/dev/null; echo -n " ==$i=="; done|sort -nrk5|awk '{printf "%s\n%s %s\n%s %s\n%s\n\n",$1,$2,$3,$4,$5,$6}'

omatictost · 2012-10-25 17:16:24 4
Pipe system log to espeak
This is sample output - yours may be different.
0

tail -f /var/log/messages.log | while read line ; do echo $line | cut -d \ -f5- | sed s/\\[[0-9]*\\]// | espeak ; done

asdfkajsdfh · 2012-10-27 23:00:53 4
Java app with dynamic classpath

Lauching an app including jars in an adjacent lib folder to its classpath
This is sample output - yours may be different.
0

java -jar app.jar -cp $(echo lib/*.jar | tr ' ' ':')

xymor · 2012-10-29 12:51:46 16
Grep through zip files

for file in `ls -t \`find . -name "*.zip" -type f\``; do found=`unzip -c "$file" | grep --color=always "PATTERN"`; if [[ $found ]]; then echo -e "${file}\n${found}\n"; fi done
This is sample output - yours may be different.
0

for file in `ls -t \`find . -name "*.zip" -type f\``; do found=`unzip -c "$file" | grep --color=always "PATTERN"`; if [[ $found ]]; then echo -e "${file}\n${found}\n"; fi done

vladfr · 2012-11-12 15:43:15 4
Screenshot in $1 seconds, upload and retrieve URI from ompdlr.org

Take a screenshot, give $1 seconds pause to choose what to screenshot, then upload and get URI of post in ompdlr.org Show Sample Output
This is sample output - yours may be different.
```
$ scrotit(){ echo "Screenshot in $1 seconds...";scrot -d $1 '%Y%m%d%h.png' -e 'curl -sF file1=@- http://ompldr.org/upload < $f | grep -P -o "(?<=File:).*(http://ompldr.org/.*)\<\/a\>";rm $f'| sed -r 's@.*(http://ompldr.org/\w{1,7}).*@\1@';}
$ scrotit 5
Sreenshot in 5 seconds...
http://ompldr.org/vZ2pqaQ
$
```
0

scrotit(){ echo "Screenshot in $1 seconds...";scrot -d $1 '%Y%m%d%h.png' -e 'curl -sF file1=@- http://ompldr.org/upload < $f | grep -P -o "(?<=File:).*(http://ompldr.org/.*)\<\/a\>";rm $f'| sed -r 's@.*(http://ompldr.org/\w{1,7}).*@\1@';}

dzup · 2012-12-03 01:21:19 4
Returns top ten (sub)directories with the highest number of files

A lot of files in one dir is not so cool for filesystem.
This is sample output - yours may be different.
0

find . -type d | while read dir ; do num=`ls -l $dir | grep '^-' | wc -l` ; echo "$num $dir" ; done | sort -rnk1 | head

stderr · 2012-12-13 13:13:16 9
Displays mpd playing status in the terminal first raw

Actually this is a shorter version that fits the 255 chars limit of this resource. The full version shows status in the right top corner: alias mpdd='while sleep 1; do _r=$(awk '\''BEGIN{FS=": "}/^Artist:/{r=r""$2};/^Title:/{r=r" - "$2};/^time:/{r=$2" "r};/^state: play/{f=1}END{if(f==1){print r}}'\'' <(mpc status;mpc currentsong));_l=${#_r};[ $_l -eq 0 ] && continue;[ -z "$_p" ] && _p=$_l;echo -ne "\e[s\e[0;${_p}H\e[K\e[u";_p=$((COLUMNS - _l));echo -ne "\e[s\e[0;${_p}H\e[K\e[0;44m\e[1;33m${_r}\e[0m\e[u";done &' mpc is defined like this: function mpc() { echo "$*" | nc 192.168.1.1 6600 } Show Sample Output
This is sample output - yours may be different.
```
132:245 Front 242 - 7Rain [GHost]
```
0

while sleep 1; do (mpc status;mpc currentsong)|awk 'BEGIN{FS=": "}/^Artist:/{r=r""$2};/^Title:/{r=r" - "$2};/^time:/{r=$2" "r};/^state: play/{f=1}END{if(f==1){print r}}'|echo -ne "\e[s\e[0;0H\e[K\e[0;44m\e[1;33m$(cat -)\e[0m\e[u";done &

ichbins · 2012-12-24 18:03:29 8
Useless fun

Something I pulled off 4chan, it plays a tune.
This is sample output - yours may be different.
0

echo "main(i){for(i=0;;i++)putchar(((i*(i>>8|i>>9)&46&i >>8))^(i&i>>13|i>>6));}" | gcc -x c - && ./a.out | aplay

r0nd0n · 2013-01-09 21:48:23 6
quick and easy way of validating a date format of yyyy-mm-dd and returning a boolean

On CentOS at least, date returns a boolean for the common date string formats, including YYYY-MM-DD. In the sample output, you can see various invalid dates returning 0 whereas a simple regex check would return 1 for the invalid dates. -d, --date=STRING display time described by STRING, not `now' The version of date on OS X does not appear to have this same option. Show Sample Output
This is sample output - yours may be different.
```
# if date -d 2006-10-10 >> /dev/null 2>&1; then echo 1; else echo 0; fi
1

# if date -d 2006-40-10 >> /dev/null 2>&1; then echo 1; else echo 0; fi
0

# if date -d 2006-13-10 >> /dev/null 2>&1; then echo 1; else echo 0; fi
0

# if date -d 2006-11-31 >> /dev/null 2>&1; then echo 1; else echo 0; fi
0
```
0

if date -d 2006-10-10 >> /dev/null 2>&1; then echo 1; else echo 0; fi

SteveGoossens · 2013-01-10 10:35:15 7
Change owner ship of files from 1003 to android under current directory recursively. 1003/android could be customized.
This is sample output - yours may be different.
0

find . | while read line; do test `stat -c %u $line` -eq 1003 && chown android:android $line && echo $line; done

changyuheng · 2013-01-12 10:47:25 7
Locate command for MAC OSX

MAC OSX doesn't come with a locate command, This will do the same thing as the locate command on a typical Linux OS. Simply add it to your ~/.bash_profile
This is sample output - yours may be different.
0

alias locate='if [ $((`date +%s`-`eval $(stat -s /var/db/locate.database); echo $st_mtime`)) -gt 3600 ]; then echo "locate: db is too old!">/dev/stderr; sudo /usr/libexec/locate.updatedb; fi; locate -i'

jhyland87 · 2013-01-21 17:45:50 4
The letter your commands most often start with

Kind of fun if you're that was inclined. I figured most of my commands start with s. sudo, screen, ssh etc. This script tells me what else they start with. Show Sample Output
This is sample output - yours may be different.
```
685 s
255 g
251 c
193 l
130 p
83 n
81 m
70 r
56 d
24 u
23 a
22 t
14 i
14 h
13 f
11 o
7 e
4 w
4 v
4 j
3 k
3 b
1 x
0 z
0 y
0 q
```
0

for i in {a..z}; do echo $(cat ~/.bash_history | grep ^$i.* | wc -l) $i; done | sort -n -r

yaMatt · 2013-01-23 18:59:13 4
Clear RAM cache
This is sample output - yours may be different.
0

su -c 'sync; echo 3 > /proc/sys/vm/drop_caches'

xmuda · 2013-01-23 22:18:45 7
shows whether your CPU supports 64bit mode

it shows whether your CPU supports 64 bit (x86-64) mode. uname -a only shows whether you have 64 bit (x86-64) or 32bit (i386) OS installed, this one-liner answers question: Can I install 64bit OS on this machine?
This is sample output - yours may be different.
0

grep -q ' lm ' /proc/cpuinfo; [ $? -eq 0 ] && echo '64bit supported'

mzet · 2013-01-24 21:41:56 4
Extract text from all PDFs in curdir & subdirs to new files named as source+.txt, linux only.

Linux users wanting to extract text from PDF files in the current directory and its sub-directories can use this command. It requires "bash", "ps2ascii" and "par", and the PARINIT environment variable sanely set (see man par). WARNING: the file "junk.sh" will be created, run, and destroyed in the current directory, so you _must_ have sufficient rights. Edit the command if you need to avoid using the file name "junk.sh"
This is sample output - yours may be different.
0

echo '#!/bin/bash' > junk.sh ; find . -iname *.pdf -type f -printf \p\s\2\a\s\c\i\i\ \"%p\"\ \ \"%p\.\t\x\u\"\;\ \p\a\r\ \<\"%p\.\t\x\u\"\ \>\"%p\.\t\x\t\"\ \;\ \r\m\ \"%p\.\t\x\u\"\ \\n >>junk.sh; chmod 766 junk.sh; ./junk.sh ; rm junk.sh

p0g0 · 2013-01-27 21:29:08 176
When using mkvirtualenv, make the current directory your base and cd into that directory every time you workon that project

for use with virtualenvwrapper http://www.doughellmann.com/projects/virtualenvwrapper/
This is sample output - yours may be different.
0

echo 'echo "cd `pwd`" >> $VIRTUAL_ENV/bin/postactivate' >> $VIRTUAL_ENV/../postmkvirtualenv

davidcollen · 2013-01-28 19:50:41 5
For Loop in DOS Batch File

You can implement a FOR loop to act on one or more files returned from the IN clause. We originally found this in order to GPG decrypt a file using wildcards (where you don't know exactly the entire file name, i.e.: Test_File_??????.txt, where ?????? = the current time in HHMMSS format). Since we won't know the time the file was generated, we need to use wildcards. And as a result of GPG not handling wildcards, this is the perfect solution. Thought I would share this revelation. :-) Show Sample Output
This is sample output - yours may be different.
```
file C:\Windows\bfsvc.exe
file C:\Windows\bootstat.dat
file C:\Windows\DtcInstall.log
file C:\Windows\EnterpriseN.xml
file C:\Windows\explorer.exe
file C:\Windows\fveupdate.exe
file C:\Windows\HelpPane.exe
file C:\Windows\hh.exe
file C:\Windows\HPMProp.INI
file C:\Windows\IE9_main.log
file C:\Windows\iis7.log
file C:\Windows\ISMIF32.dll

Press any key to continue . . .
```
0

FOR %%c in (C:\Windows\*.*) DO (echo file %%c)

jmcclosk · 2013-01-31 15:19:54 10
One liner to show a notification on Desktop in case the load exceeds 1.

I run this via crontab every one minute on my machine occasionally to see if a process is eating up my system's resources.
This is sample output - yours may be different.
0

load=`uptime|awk -F',' '{print $3}'|awk '{print $3}'`; if [[ $(echo "if ($load > 1.0) 1 else 0" | bc) -eq 1 ]]; then notify-send "Load $load";fi

adimania · 2013-02-06 08:30:24 5
private mode for (bash) shell

same as "unset HISTFILE" - but the advantage is that you can "tab-complete" it and when you do, you won't mistype it (which could lead to not unsetting the HISTFILE). put the alias in the ~/.bash_profile or ~/.bashrc file in your users home directory, respawn, enjoy! :) Show Sample Output
This is sample output - yours may be different.
```
[*] private mode activated.
```
0

alias private_mode='unset HISTFILE && echo -e "\033[1m[\033[0m\033[4m*\033[0m\033[1m] \033[0m\033[4mprivate mode activated.\033[0m"'

s__ · 2013-02-17 00:03:37 3
Check if *hardware* is 32bit or 64bit

Avoids cat abuse ;)
This is sample output - yours may be different.
0

grep " lm " /proc/cpuinfo > /dev/null && echo "64-bit" || echo "32-bit"

MrCode · 2013-02-19 21:40:44 4
Delete all files in folder without affecting load

While `echo rm * | batch` might seem to work, it might still raise the load of the system since `rm` will be _started_ when the load is low, but run for a long time. My proposed command executes a new `rm` execution once every minute when the load is small. Obviously, load could also be lower using `ionice`, but I still think this is a useful example for sequential batch jobs. Show Sample Output
This is sample output - yours may be different.
```
warning: commands will be executed using /bin/sh
job 40 at Fri Mar  1 16:07:00 2013
warning: commands will be executed using /bin/sh
job 41 at Fri Mar  1 16:07:00 2013
warning: commands will be executed using /bin/sh
job 42 at Fri Mar  1 16:07:00 2013
warning: commands will be executed using /bin/sh
job 43 at Fri Mar  1 16:07:00 2013
```
0

find . -type f -exec echo echo rm {} '|' batch ';'|bash

Ztyx · 2013-03-01 15:14:08 5
make a bunch of files based on a template file

make a bunch of files with the same permissions, owner, group, and content as a template file (handy if you have much to do w. .php, .html files or alike)
This is sample output - yours may be different.
0

echo "template file: ";read tpl;echo "new file(s separated w. space):"; read fl;touch $fl;find $fl -exec cp -ap $tpl "{}" \;

knoppix5 · 2013-03-08 10:00:36 6
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Change timestamp on a file

-a for access time, -m for modification time, -c do not create any files, -t timestamp

Nice info browser

pinfo package provide a nice info alternative based on ncurses.

get a rough estimate about how much disk space is used by all the currently installed debian packages

The vaule is expressed in megabytes

Using scapy to get the IP of the iface used to contact local gw (i.e. supposed host IP)

You need python-scapy package

Check if you partition are aligned

To get most of you HDD/SSD driver you need to make sure you partition are aligned, if not the speed penalty can be up to 50% slower! this simple one liner will check to see if each partition start sector is divided by 512 you need to change sda with your driver if you find the one of your partitions is not aligned use gparted to move the start sector of the partition to be divided of 512

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" }

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Install pip with Proxy

Installs pip packages defining a proxy

Shows size of dirs and files, hidden or not, sorted.

Enhanced version: fixes sorting by human readable numbers, and filters out non MB or GB entries that have a G or an M in their name.

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 echo (1,545)

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