Commands using tr sorted by votes

Commands using tr (349)

sorted by

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 03:41:14 224
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
‹ First < 5 6 7 8 9 > Last ›

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Command line progress bar

This command tar?s up a directory and sends the output to gzip, showing a rate of 223MB/s. This may require you installing the pv command. For debian based users out there: $ sudo aptitude install pv

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

List all installed PERL modules by CPAN

This command will give you the detailed information about the installed perl modules i.e. installed path, Link type, version, files etc.

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

Show one line summaries of all DEB packages installed on Ubuntu based on pattern search

I sometimes want to know what packages are installed on my Ubuntu system. I still haven't figured out how to use aptitude effectively, so this is the next best thing. This allows finding by name. The grep '^ii' limits the display to only installed packages. If this is not specified, then it includes listing of non-installed packages as well.

List only executables installed by a debian package

I wanted to view only executables installed by a package. This seemed to work. There's got to be easier way, please share. Note: (1) Replace iptables with the package name of your interest (2) The command will trash any existing environment variable named 'lst' (3) Instead if you are interested in viewing just .ko or .so files installed by this package, then that would be easy: $ dpkg -L iptables | grep "\.[sk]o$"

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"

Decrypt exported android wallet keys for import into desktop client (LTC,FTC,BTC)

view hex mode in vim

Bitcoin Brainwallet Exponent Calculator

A bitcoin "brainwallet" is a secret passphrase you carry in your brain. The Bitcoin Brainwallet Exponent Calculator is one of three functions needed to calculate the bitcoin PRIVATE key. Roughly, the formula is exponent = sha256 (passphrase) Note that this is a bash function, which means you have to type its name to invoke it. You can check the accuracy of the results here http://brainwallet.org

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands using tr

Commands using tr (349) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

Commands using tr (349)

sorted by