Commands using echo sorted by votes

Commands using echo (1,545)

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Count music files in each directory
This is sample output - yours may be different.
0

for i in */; do echo $(find $i -type f -regextype posix-extended -regex ".*\.(mp3|ogg|wav|flac)" | wc -l) $i ; done

mindfuckup · 2013-12-22 14:33:56 7
Grabs a random image from "~/wallpapers" and sets it as background

Generates a bash array and uses it to select a random image from ~/wallpapers.
This is sample output - yours may be different.
0

cd ~/wallpapers;arr=( * );num_wallpapers=${#arr[@]};wallpaper=${arr[$(echo $RANDOM%$num_wallpapers|bc)]};feh --bg-fill $wallpaper

Evidlo · 2013-12-30 01:56:24 7
Returns the Windows file details for any file using Cygwin bash (actual r-click-properties-info) to the term

Pass the files path to finfo(), can be unix path, dos path, relative or absolute. The file is converted into an absolute nix path, then checked to see if it is in-fact a regular/existing file. Then converted into an absolute windows path and sent to "wmic". Then magic, you have windows file details right in the terminal. Uses: cygwin, cygpath, sed, and awk. Needs Windows WMI "wmic.exe" to be operational. The output is corrected for easy... finfo notepad.exe finfo "C:\windows\system32\notepad.exe" finfo /cygdrive/c/Windows/System32/notepad.exe finfo "/cygdrive/c/Program Files/notepad.exe" finfo ../notepad.exe Show Sample Output
This is sample output - yours may be different.
```
###Full Example Output
AccessMask=18809279
Archive=TRUE
Caption=c:\windows\system32\notepad.exe
Compressed=FALSE
CompressionMethod=
CreationClassName=CIM_LogicalFile
CreationDate=20090713165636.838522-420
CSCreationClassName=Win32_ComputerSystem
CSName=MYCOMPUTERNAME
Description=c:\windows\system32\notepad.exe
Drive=c:
EightDotThreeFileName=c:\windows\system32\notepad.exe
Encrypted=FALSE
EncryptionMethod=
Extension=exe
FileName=notepad
FileSize=193536
FileType=Application
FSCreationClassName=Win32_FileSystem
FSName=NTFS
Hidden=FALSE
InstallDate=20090713165636.838522-420
InUseCount=
LastAccessed=20090713165636.838522-420
LastModified=20090713183925.490000-420
Manufacturer=Microsoft Corporation
Name=c:\windows\system32\notepad.exe
Path=\windows\system32\
Readable=TRUE
Status=OK
System=FALSE
Version=6.1.7600.16385
Writeable=TRUE
```
0

finfo() { [[ -f "$(cygpath "$@")" ]] || { echo "bad-file";return 1;}; echo "$(wmic datafile where name=\""$(echo "$(cygpath -wa "$@")"|sed 's/\\/\\\\/g')"\" get /value)"|sed 's/\r//g;s/^M$//;/^$/d'|awk -F"=" '{print $1"=""\033[1m"$2"\033[0m"}';}

lowjax · 2013-12-30 07:47:41 27
Sequentially repair multiple cassandra nodes at once

Repair each node in sequence. Make sure you change the IP replacements to match your environment
This is sample output - yours may be different.
0

for s in 172.16.{1,2}2.9{0,1,2}; do echo "Repairing node $s..."; nodetool -h $s repair -pr; done

mrwulf · 2014-01-01 17:05:40 6
Use php and md5 to generate a password

echo defaults to include a newline character at the end of the string, which messes with the hash. If you suppress it with -n then it has the same effect as PHP's ?echo md5("string"), "\t-";? Even more, by using cut you get the exact same output, so it works as a drop-in replacement for the original command for this thread. Show Sample Output
This is sample output - yours may be different.
```
b45cffe084dd3d20d928bee85e7b0f21
```
0

echo -n "string" | md5sum|cut -f 1 -d " "

labadf · 2014-02-20 22:44:00 6
Convert ascii string to hex

hexdump could be used for conversion too!
This is sample output - yours may be different.
0

echo -n text | hexdump -C

Tomofumi · 2014-02-21 09:15:15 7
Recompress all files in current directory from gzip to bzip2

- recompresses all gz files to bz2 files from this point and below in the directory tree - output shows the size of the original file, and the size of the new file. Useful. - conceptually easier to understand than playing tricks with awk and sed. - don't like output? Use the following line: for gz in `find . -type f -name '*.gz' -print`; do f=`basename $gz .gz` && d=`dirname $gz` && gunzip -c $gz | bzip2 - -c > $d/$f.bz2 && rm -f $gz ; done Show Sample Output
This is sample output - yours may be different.
```
44 ./test/ssl-access.log-20140119.gz ... 24 ./test/ssl-access.log-20140119.bz2
44 ./test/ssl-access.log-20140117.gz ... 24 ./test/ssl-access.log-20140117.bz2
44 ./test/ssl-access.log-20140116.gz ... 24 ./test/ssl-access.log-20140116.bz2
```
0

for gz in `find . -type f -name '*.gz' -print`; do f=`basename $gz .gz` && d=`dirname $gz` && echo -n `ls -s $gz` "... " && gunzip -c $gz | bzip2 - -c > $d/$f.bz2 && rm -f $gz && echo `ls -s $d/$f.bz2`; done

pdwalker · 2014-03-13 08:36:24 7
Generate a one-time TOTP token, then restore the clipboard after 3 seconds

Typing a word in terminal is easier than digging your phone out, opening your two-factor authentication app and typing the code in manually. This alias copies the one-time code to your clipboard for 3 seconds (long enough to paste it into a web form), then restores whatever was on the clipboard beforehand. This command works on Mac. Replace pbpaste/pbcopy with your distribution's versions.
This is sample output - yours may be different.
0

alias oath='temp=$(pbpaste) && oathtool --base32 --totp "YOUR SEED HERE" | pbcopy && sleep 3 && echo -n $temp | pbcopy'

unixmonkey44825 · 2014-03-14 19:21:18 6
Convert from unixtime in millisecond
This is sample output - yours may be different.
0

echo 1395767373016 | gawk '{print strftime("%c", ( $0 + 500 ) / 1000 )}'

3rl4ng · 2014-03-26 06:59:28 7
Recursive find all mp4s in a folder and convert to ogv if the ogv does not exist or the mp4 is newer then the current ogv
This is sample output - yours may be different.
0

for file in $(find . -name *.mp4); do ogv=${file%%.mp4}.ogv; if test "$file" -nt "$ogv"; then echo $file' is newer then '$ogv; ffmpeg2theora $file; fi done

fatlinesofcode · 2014-04-14 23:26:19 7
Check SSH fingerprints

Find all private keys and dump their fingerprints. Show Sample Output
This is sample output - yours may be different.
```
id_rsa: 2048 aa:bb:cc:dd:ee:ff:00:11:22:33:44:55:66:77:88:99  id@base-id (RSA)
other: 2048 00:11:22:33:44:55:66:77:88:99:aa:bb:cc:dd:ee:ff  id@OTHER.com (RSA)
```
0

for id in `ls -1 ~/.ssh | grep -v "authorized\|known_hosts\|config\|\."` ; do echo -n "$id: " ; ssh-keygen -l -f .ssh/$id ; done

drockney · 2014-04-16 14:12:20 25
Bruteforce dm-crypt using dictionary

Lost your luks passphrase? You can always bruteforce from the command line. See the sample output, a simple command using a dictionary. Show Sample Output
This is sample output - yours may be different.
```
# cat dictionary.txt|while read a; do echo $a; echo $a|cryptsetup luksOpen /dev/sda5 $a && echo KEY FOUND; done
pass
No key available with this passphrase.
PasS
No key available with this passphrase.
PASs
No key available with this passphrase.
PA5s
No key available with this passphrase.
P4s5
KEY FOUND
...

# ls -l /dev/mapper/
total 0
crw------T 1 root root 10, 236 Apr 16 19:49 control
lrwxrwxrwx 1 root root       7 Apr 16 20:34 P4s5 -> ../dm-1
```
0

cat dictionary.txt|while read a; do echo $a|cryptsetup luksOpen /dev/sda5 sda5 $a && echo KEY FOUND: $a; done

rodolfoap · 2014-04-16 18:49:53 10
AIX: get LUN ID for a given filesystem

For a given filesystem return the LUN ID. Command assumes 1:1 relationship between fs:lv:hdisk:lun which may not be the case in all environments. Show Sample Output
This is sample output - yours may be different.
```
$ getlunid /usr
371100c801ef00004c0000000102745c6e41.105VDASD03AIXvscsi
```
0

getlunid() { lv=$(df -P $1|grep "^/dev/"|awk '{print $1}'|awk -F/ '{print $3}'); hd=$(lslv -l $lv|tail -1|awk '{print $1}');id=$(odmget -q "name like $hd AND attribute=unique_id" CuAt|grep "value ="|awk -F= '{print $2}'|tr -d '"');echo $id;}

bigstupid · 2014-04-20 18:43:21 6
List files that are not owned by any installed package

In this example I am returning all the files in /usr/bin that weren't put there by pacman, so that they can be moved to /usr/local/bin where they (most likely) belong. Show Sample Output
This is sample output - yours may be different.
```
/usr/bin/archnews
/usr/bin/evhz
/usr/bin/pager
/usr/bin/pinentry-ncurses
/usr/bin/shortping
/usr/bin/showcolors
/usr/bin/xlock
```
0

for file in /usr/bin/*; do pacman -Qo "$file" &> /dev/null || echo "$file"; done

malathion · 2014-04-22 21:57:08 11
How to HTMLize many files containing accents ?|?|?|?|?

If we've many files containing (?, ?, ?, ?, ? ) characters instead of ?, ?,... etc,... we can ue this simple command line running a sed command inside a for loop searching for files containing that characters. Hope u like it! Enjoy! ;) Show Sample Output
This is sample output - yours may be different.
```
HTMLizing file [ es/aboutus.php ] ............OK 
HTMLizing file [ es/contact.php ] ............OK 
```
0

for i in `grep -ri "?\|?\|?\|?\|?" * --col | cut -d: -f1 |sort -u `;do sed -i "s/?/\á/g" $i; sed -i "s/?/\é/g" $i; sed -i "s/?/\í/g" $i; sed -i "s/?/\ó/g" $i; sed -i "s/?/\ú/g" $i; echo "HTMLizing file [$i]";done

linuxninja · 2014-04-24 11:43:36 6
Recursively count the number of CSV files in each given directory

The `*.csv` type can be substituted for anything you want Show Sample Output
This is sample output - yours may be different.
```
23	movie_statistics
220	actor_statistics
52	director_statistics
```
0

csvcount() { for dir in $@; do echo -e "$(find $dir -name '*.csv' | wc -l)\t$dir"; done }

olebebo · 2014-04-29 07:23:28 41
To Find CVE fix from the rpm log

Found it online and could be very useful
This is sample output - yours may be different.
0

for i in $(cat vulns.txt); do echo $i; rpm -qa ?changelog | grep -i $i; done

sonny108 · 2014-04-30 16:11:14 6
Flush memcache cache
This is sample output - yours may be different.
0

echo 'flush_all' | nc localhost 11211

djzander · 2014-05-21 18:14:28 7
A simple function to conveniently extract columns from an input stream

Something I do a lot is extract columns from some input where cut is not suitable because the columns are separated by not a single character but multiple spaces or tabs. So I often do things like: ... | awk '{print $7, $8}' ... which is a lot of typing, additionally slowed down when typing symbols like '{}$ ... Using the simple one-line function above makes it easier and faster: ... | col 7 8 How it works: The one-liner defines a new function with name col The function will execute awk, and it expects standard input (coming from a pipe or input redirection) The function arguments are processed with sed to use them with awk: replace all spaces with ,$ so that for example 1 2 3 becomes 1,$2,$3, which is inserted into the awk command to become the well formatted shell command: awk '{print $1,$2,$3}' Allows negative indexes to extract columns relative to the end of the line. Credit: http://www.bashoneliners.com/oneliners/oneliner/144/ Show Sample Output
This is sample output - yours may be different.
```
$ echo a b c | col 1 -0 -1
a c b
```
0

col() { awk '{print $('$(echo $* | sed -e s/-/NF-/g -e 's/ /),$(/g')')}'; }

tekniq · 2014-06-05 18:01:31 8
Chronometer

Chronometer using the bc calculator. Show Sample Output
This is sample output - yours may be different.
```
0
1
2
3
4
5
...
```
0

NUM=-1; while NUM=`echo $NUM + 1 | bc`; do echo $NUM && sleep 1; done

tomivs · 2014-06-07 20:48:45 9
Search google.com on your terminal

Mac OSX friendly version of google function Show Sample Output
This is sample output - yours may be different.
```
http://www.bbc.co.uk/schoolradio/subjects/earlylearning/nurserysongs/P-T/row_row_row_your_boat
http://www.bbc.co.uk/schoolradio/subjects/earlylearning/nurserysongs/P-T/row_row_row_your_boat
http://www.wordsforlife.org.uk/songs/row-your-boat
http://supersimplelearning.com/other-songs/row-row-row-your-boat/
http://wiki.kcls.org/index.php/Row,_Row,_Row_Your_Boat
http://bussongs.com/songs/row-row-row-your-boat.php
```
0

function google { Q="$@";GOOG_URL='https://www.google.com/search?tbs=li:1&q=';AGENT="Mozilla/4.0";stream=$(curl -A "$AGENT" -skLm 10 "${GOOG_URL}${Q//\ /+}");echo "$stream" | grep -o "href=\"/url[^\&]*&" | sed 's/href=".url.q=$[^\&]*$.*/\1/';}

davethomas11 · 2014-06-18 17:20:41 6
Print machine's ipv4 addresses
This is sample output - yours may be different.
0

echo $(ifconfig) | egrep -o "en.*?inet [^ ]* " | sed 's/.*inet $.*$$/\1/' | tail -n +2

davethomas11 · 2014-06-19 22:09:03 7
Get result of command in pipe sequence

Using the $PIPESTATUS array you can get the results of a command in a sequence of commands piped together. The command above returns the result of grep -o "bob", which is exit result of 1 since no match was made. Show Sample Output
This is sample output - yours may be different.
```
1
```
0

echo "Dave" | grep -o "bob" | sed 's/D/f/'; echo ${PIPESTATUS[1]};

davethomas11 · 2014-06-21 04:00:53 10
Send email from terminal
This is sample output - yours may be different.
0

echo "some cool message from terminal" | mail -s "test" email@address.com

narven · 2014-06-25 10:06:00 7
Unique data (replacement for sort | uniq -u)

Show Sample Output
This is sample output - yours may be different.
```
b
c
d
```
0

echo -e "a\na\nb\nc\nd" | awk '{x[$0]++}END{for (z in x){if(x[z]==1){print z}}}'

gatespb · 2014-06-27 06:10:56 10
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Read and write to TCP or UDP sockets with common bash tools

Ever needed to test firewalls but didn't have netcat, telnet or even FTP? Enter /dev/tcp, your new best friend. /dev/tcp/(hostname)/(port) is a bash builtin that bash can use to open connections to TCP and UDP ports. This one-liner opens a connection on a port to a server and lets you read and write to it from the terminal. How it works: First, exec sets up a redirect for /dev/tcp/$server/$port to file descriptor 5. Then, as per some excellent feedback from @flatcap, we launch a redirect from file descriptor 5 to STDOUT and send that to the background (which is what causes the PID to be printed when the commands are run), and then redirect STDIN to file descriptor 5 with the second cat. Finally, when the second cat dies (the connection is closed), we clean up the file descriptor with 'exec 5>&-'. It can be used to test FTP, HTTP, NTP, or can connect to netcat listening on a port (makes for a simple chat client!) Replace /tcp/ with /udp/ to use UDP instead.

Define a quick calculator function

defines a handy function for quick calculations from cli. once defined: $ ? 10*2+3

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

A shorter version

statistics in one line

In this example, file contains five columns where first column is text. Variance is calculated for columns 2 - 5 by using perl module Statistics::Descriptive. There are many more statistical functions available in the module.

log a command to console and to 2 files separately stdout and stderr

Generate Random Text based on Length

Random text of length "$1" without the useless cat command.

Dumping Audio stream from flv (using mplayer)

kill some process (same as others) but parsing to a variable

Kills a process matching program. I suggest using $ pgrep -fl program to avoid over-killings Nice the following: kills all bash process owned by guest $ pkill -9 -f bash -u guest

Display ncurses based network monitor

Nload is part of nload package, tested under Debian. Nload display network bandwidth statistics, -u m options stands for MBit unit measure.

Finding all files on local file system with SUID and SGID set

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Commands using echo (1,545)

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