Commands using tr sorted by votes

Commands using tr (349)

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count files by type

displays a list of all file extensions in current directory and how many files there are of each type of extension in ascending order (case insensitive) Show Sample Output
This is sample output - yours may be different.
```
      1 .md5
      1 .pub
      1 .pxd
      1 .rtf
      1 .sql
      1 .vsd
      2 .csv
      2 .lnk
      3 .7z
      3 .msg
      3 .xls
      3 .xlsm
      3 .zip
      4 .doc
      5 .htm
      5 .pptx
      5 .xps
      9 .txt
     13 .jpg
     16 .png
     19 .xlsx
     23 .docx
     48 .pdf
```
1

ls | tr [:upper:] [:lower:] | grep -oP '\.[^\.]+$' | sort | uniq -c | sort

icefyre · 2014-01-30 11:37:27 10
Sort netflow packet capture

Sort netflow packet capture by unique connections excluding source port. Show Sample Output
This is sample output - yours may be different.
```
    224 10.153.154.131->10.153.199.4:443
    206 10.153.217.69->10.153.156.4:53
    156 204.188.136.12->10.153.29.36:443
    121 204.156.7.28->10.153.29.35:443
    110 10.153.136.10->10.153.156.5:53
    104 10.153.219.86->10.153.156.4:53
```
1

grep -o -P '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\:[0-9]{1,5}\s->\s{5}[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\:[0-9]{1,5}' <capture file> | tr -d ' ' | sed 's/:.....//g' | sort -n | uniq -c | sort -nr

santizo · 2014-03-05 21:34:42 8
Print the IP address and the Mac address in the same line

Print the IP address and the Mac address in the same line Show Sample Output
This is sample output - yours may be different.
```
mac:00:50:12:BD:5E:5B - adr:192.168.0.1
```
1

ifconfig | head -n 2 | tr -d '\n' | sed -n 's/.*$00:[^ ]*$.*$adr:[^ ]*$.*/mac:\1 - \2/p'

Koobiac · 2014-09-03 14:35:27 18
"Pretty print" $PATH, separate path per line

from: http://www.unix.com/shell-programming-and-scripting/28047-split-print-path.html Show Sample Output
This is sample output - yours may be different.
```
/usr/local/bin
/usr/sbin
/usr/bin
/sbin
/bin
```
1

echo $PATH | tr -s ':' '\n'

Trindaz · 2014-09-18 18:39:01 8
generate a telephone keypad

seems a useless command ... Show Sample Output
This is sample output - yours may be different.
```
1	2	3
4	5	6
7	8	9
*	0	#
```
1

echo {1..9} '* 0 #' | tr ' ' '\n' |paste - - -

jianingy · 2014-12-27 09:38:36 8
Delete specific sender in mailq
This is sample output - yours may be different.
1

postqueue -p | tail -n +2 | awk 'BEGIN { RS = "" } / user@example\.com/ { print $1 }' | tr -d '*!' | postsuper -d -

fromthestone · 2015-02-12 01:01:59 8
Stores the certificate expiration date on the variable A

Stores the certificate expiration date on the variable A Show Sample Output
This is sample output - yours may be different.
```
May 20 2015
```
1

echo | openssl s_client -connect www.batatinha.com.br:443 2>/dev/null | openssl x509 -noout -dates | tail -1 | tr -s " " |cut -d "=" -f2 | cut -d " " -f1,2,4

alissonf · 2015-03-09 17:17:46 8
draw rhomb
This is sample output - yours may be different.
1

a=$(b=$(($LINES/2));f() { for c in $(seq $b); do for i in $(seq $c);do echo x;done|xargs echo;done };paste <(f) <(f|tac|tr 'x' '-') <(f|tac|tr 'x' '-') <(f)|tr '\t' ' ');(cat <<<"$a"|tac;cat <<<"$a")|tr '-' ' '

knoppix5 · 2015-04-08 02:33:05 16
Printout a list of field numbers (awk index) from a CSV file with headers as first line.

Useful to identify the field number in big CSV files with large number of fields. The index is the reference to use in processing with commands like 'cut' or 'awk' involved. Show Sample Output
This is sample output - yours may be different.
```
$ cat file.csv
ID, EMPLOYEE, AGE, SALARY
2,Jack Sparrow,41,10000
3,Mr. Bean,55,12900
15,Kermit the frog,25,29300

$ head -1 file.csv | tr ',' '\n' | tr -d " " | awk '{print NR,$0}'
1 ID
2 EMPLOYEE
3 AGE
4 SALARY
```
1

head -1 file.csv | tr ',' '\n' | tr -d " " | awk '{print NR,$0}'

neomefistox · 2015-08-26 05:46:15 18
List every docker's name, IP and port mapping
This is sample output - yours may be different.
1

docker inspect --format "{{ .Name }} # {{ .NetworkSettings.IPAddress }} # {{ .NetworkSettings.Ports }}" $(docker ps -q) | tr -s '#' '\t'

olopopo · 2015-11-25 10:30:23 11
Pulse Volume Control Using Zenity

This produces a little bar that you can use to set the volume percentage.
This is sample output - yours may be different.
1

amixer -D pulse sset Master $(zenity --scale --text="Select a number" --value=$(amixer -D pulse sget Master | grep -Eo '..[0-9]'% | tr -d '%[, ' | tail -n 1) --min-value="0" --max-value="100" --step="1")%

lowrez · 2016-01-02 03:20:41 10
Join lines and separate with spaces

Read vmargs.txt, which is a text file that could either be DOS-style (\r\n) or UNIX-style (\n) line endings and join the lines with a space separator. Can this be shortened/made more elegant? Show Sample Output
This is sample output - yours may be different.
```
(line1) (line2) (line3) ...
```
1

tr -d '\r' < vmargs.txt | tr '\n' ' '

wytten12 · 2016-12-31 18:20:03 20
Image to color palette generator

Extract a color palette from a image useful for designers. Example usage: extract-palette myawesomeimage.jpg 4 Where the first argument is the image you want to extract a palette from. The second argument is the number of colors you want. It may be the case where you want to change the search space. In that case, change the -resize argument to a bigger or smaller result. See the ImageMagick documentation for the -resize argument. Show Sample Output
This is sample output - yours may be different.
```
#0F0E17
#60579D
#9D6E97
#E99B75
#C57D8F
#D89690
#AA736B
#4D3B3F
```
1

extract-palette() { convert "$1" -resize 300x -dither None -colors "$2" txt: | tail -n +2 | tr -s ' ' | cut -d ' ' -f 3 | sort | uniq -c | sort -rn | tr -s ' ' | cut -d ' ' -f 3;}

seabre · 2017-06-21 22:07:26 51
NSA codename generator

nsacodenamegenerator dot com is no more outputs random two words together in capital letters Show Sample Output
This is sample output - yours may be different.
```
COUNTRIFIEDPORCELAIN
```
1

shuf -n 2 /usr/share/dict/words | tr -dc [:alnum:] | tr '[:lower:]' '[:upper:]'; echo

ktree · 2017-08-27 21:35:36 22
Generate Random Text based on Length

Random text of length "$1" without the useless cat command.
This is sample output - yours may be different.
1

genRandomText() { tr -cd '[:alpha:]' < /dev/urandom | head -c "$1"; }

SouthwindCG · 2018-06-05 03:41:14 223
Count the total amount of hours of your music collection

First the find command finds all files in your current directory (.). This is piped to xargs to be able to run the next shell pipeline in parallel. The xargs -P argument specifies how many processes you want to run in parallel, you can set this higher than your core count as the duration reading is mainly IO bound. The -print0 and -0 arguments of find and xargs respectively are used to easily handle files with spaces or other special characters. A subshell is executed by xargs to have a shell pipeline for each file that is found by find. This pipeline extracts the duration and converts it to a format easily parsed by awk. ffmpeg reads the file and prints a lot of information about it, grep extracts the duration line. cut and sed cut out the time information, and tr converts the last . to a : to make it easier to split by awk. awk is a specialized programming language for use in shell scripts. Here we use it to split the time elements in 4 variables and add them up. Show Sample Output
This is sample output - yours may be different.
```
1036:17687:2689.686985895
```
1

find . -print0 | xargs -0 -P 40 -n 1 sh -c 'ffmpeg -i "$1" 2>&1 | grep "Duration:" | cut -d " " -f 4 | sed "s/.$//" | tr "." ":"' - | awk -F ':' '{ sum1+=$1; sum2+=$2; sum3+=$3; sum4+=$4 } END { printf "%.0f:%.0f:%.0f.%.0f\n", sum1, sum2, sum3, sum4 }'

pingiun · 2019-03-01 20:21:48 40
get a rough estimate about how much disk space is used by all the currently installed debian packages

The vaule is expressed in megabytes Show Sample Output
This is sample output - yours may be different.
```
$ echo $[ ($(dpkg-query -s $(dpkg --get-selections | grep -oP '^.*(?=\binstall)') | grep -oP '(?<=Installed-Size: )\d+' | tr '\n' '+' | sed 's/+$//')) / 1024 ]
4506
```
1

echo $[ ($(dpkg-query -s $(dpkg --get-selections | grep -oP '^.*(?=\binstall)') | grep -oP '(?<=Installed-Size: )\d+' | tr '\n' '+' | sed 's/+$//')) / 1024 ]

acavagni · 2019-06-02 16:35:34 55
Slugify: converts strings in any language into Slugs (friendly names to use in URLs and filenames)

Slug the part of an URL which identifies a page using human-readable keywords. Slugs are used to construct friendly URLs (often for permalinks) that are easy to type, descriptive, and easy to remember. Show Sample Output
This is sample output - yours may be different.
```
function slugify() { tr '[:upper:]' '[:lower:]' <<< "$(sed -z -r -e 's~[^[:alnum:]]+~ ~g' -e 's~ (he|here|how|it|she|there|what|when|where|who) s ~ \1 is ~gi' -e 's~^ *~~;s~ *$~~' -e 's~ +~-~g' - <<< " $(iconv -c -t ASCII//TRANSLIT//IGNORE - <<< " $@ " ) ")"; }


# testing special characters and spaces:
slugify " Test: µÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝß      and àáâãäåæçèéêëìíîïðñòóôõöøùúûüýÿ ";

# output:
test-uaaaaaaaeceeeeiiiidnoooooouuuuyss-and-aaaaaaaeceeeeiiiidnoooooouuuuyy
```
1

function slugify() { tr '[:upper:]' '[:lower:]' <<< "$(sed -z -r -e 's~[^[:alnum:]]+~ ~g' -e 's~^ *~~;s~ *$~~' -e 's~ +~-~g' - <<< "$(iconv -c -t ASCII//TRANSLIT//IGNORE - <<< "$@" )")"; }

mikhail · 2019-06-08 17:45:57 42
Generate a random password 30 characters long
This is sample output - yours may be different.
1

tr -c -d "a-zA-Z0-9" </dev/urandom | dd bs=30 count=1 2>/dev/null;echo

tlezotte · 2019-06-29 22:46:41 43
draw line separator (using knoppix5 idea)

This is a slightly modified version of the knoppix5 user oneliner (https://www.commandlinefu.com/commands/view/24571/draw-line-separator). Show Sample Output
This is sample output - yours may be different.
```
$ seq -s '*' 40 | tr -dc '[*\n]'
***************************************
```
1

seq -s '*' 40 | tr -dc '[*\n]'

acavagni · 2019-07-01 07:24:47 39
Realtime lines per second in a log file, with history

This is similar to standard `pv`, but it retains the rate history instead of only showing the current rate. This is useful for spotting changes. To do this, -f is used to force pv to output, and stderr is redirected to stdout so that `tr` can swap the carriage returns for new lines. (doesn't work correctly is in zsh for some reason. Tail's output isn't redirected to /dev/null like it is in bash. anyone know why? ???????) Show Sample Output
This is sample output - yours may be different.
```
[2.00  s]
[2.00  s]
[4.20  s]
[20.4  s]
[8.20  s]
[11.6  s]
[2.02  s]
[13.9  s]
[7.19  s]
[5.00  s]
[2.00  s]
[16.4  s]
[10.8  s]
```
1

tail -f access.log | pv -l -i10 -r -f 2>&1 >/dev/null | tr /\\r \ \\n

varenc · 2020-04-19 02:07:40 95
scan multiple log subdirectories for the latest log files and tail them
This is sample output - yours may be different.
1

ls /var/log/* -ld | tr -s " " | cut -d" " -f9 | xargs -i{} sh -c 'echo "\n---{}---\n"; tail -n50 {}/`ls -tr {} | tail -n1`'

jgleeson · 2021-05-11 12:31:22 177
Compute newest kernel version from Makefile on Torvalds' git repository

The platform-agnostic version of https://www.commandlinefu.com/commands/view/25276/compute-newest-kernel-version-from-makefile-on-torvalds-git-repository because macOS doesn't have wget installed
This is sample output - yours may be different.
1

curl -s -o - https://raw.githubusercontent.com/torvalds/linux/master/Makefile | head -n5 | grep -E '\ \=\ [0-9]{1,}' | cut -d' ' -f3 | tr '\n' '.' | sed -e "s/\.$//"

realkstrawn93 · 2023-08-10 22:25:55 228
Remove all directories less than 1 MB in size in or below current directory
This is sample output - yours may be different.
0

find . -type d -execdir du -sh '{}' ';' | grep -E "[0-9]+K" | sed 's/^[0-9\.]\+K[\t ]\+//' | tr "\n" "\0" | xargs -0 rm -rf

jdunn · 2009-02-20 19:44:49 14
this toggles mute on the Master channel of an alsa soundcard

I've had this as mute.sh in my ~/bin/ for some time.
This is sample output - yours may be different.
0

on="off"; off="on"; now=$(amixer get Master | tr -d '[]' | grep "Playback.*%" |head -n1 |awk '{print $7}'); amixer sset Master ${!now}

hans · 2009-02-25 09:03:08 8
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Record live sound in Vorbis (eg for bootlegs or to take audio notes)

This will record the capture channel of your soundcard, directly encoded in Ogg Vorbis, in stereo at quality 5 (I'm using this to record live jam sessions from my line input). You can choose which device to capture (eg. line input, microphone or PCM output) with $ alsamixer -V capture You can do the same thing and live encode in MP3 or FLAC if you wish, just check FLAC and LAME man pages.

This allows you to find a string on a set of files recursivly

The -r is for recursive, -F for fixed strings, --include='*.txt' identifies you want all txt files to be search any wildcard will apply, then the string you are looking for and the final * to ensure you go through all files and folders within the folder you execute it.

Remote execute command as sudoer via ssh

Example: remote install an application(wine). sshpass -p 'mypssword' ssh -t mysshloginname@192.168.1.22 "echo 'mypassword' | sudo -S apt-get install wine" Tested on Ubuntu.

Remove all old kernels

http://askubuntu.com/questions/89710/how-do-i-free-up-more-space-in-boot

Multi line grep using sed and specifying open/close tags

This line does not include your closing tag in the output.

Start a quick rsync daemon for fast copying on internal secure network

"Sample output" shows a minimalistic configuration file.

Find usb device

I often use it to find recently added ou removed device, or using find in /dev, or anything similar. Just run the command, plug the device, and wait to see him and only him

Find files and list them sorted by modification time

Works with files containing spaces and for very large directories.

Tricky implementation of two-dimensional array in Bash.

Since Bash doesn't support two-dimensional arrays, you can limit your columns length by some big enough constant value ( in this example 100 ) and then index the array with i and j, or maybe write your own get() and set() methods to index the array properly like I implemented for example ( see Sample output ). For example for i=0 and j=0...99 you'll pick up one of 100 elements in the range [0,99] in the one-dimensional array. For i=1 and j=0...99 you'll pick up one of 100 elements in the range [100,199]. And so on. Be careful when using this, and remember that in fact you are always using one-dimensional array.

Count down from 10

Countdown from 10 or whatever you want:)

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Commands using tr (349)

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