Commands using tr sorted by votes

Commands using tr (349)

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Print a row of 50 hyphens

Better -and faster- using bash printf. Show Sample Output
This is sample output - yours may be different.
```
$ time printf "%50s\n"|tr \  -
--------------------------------------------------

real	0m0.008s
user	0m0.000s
sys	0m0.008s
```
-2

printf "%50s\n"|tr ' ' -

rodolfoap · 2010-01-07 08:49:46 6
Print a row of 50 hyphens
This is sample output - yours may be different.
-2

printf "%.50d" 0 | tr 0 -

sata · 2010-03-25 12:52:45 3
commit message generator - whatthecommit.com

#Sample Usage: # git commit -m"Jira #404 - `whatthecommit`" # Show Sample Output
This is sample output - yours may be different.
```
No changes made
```
-2

curl -s http://whatthecommit.com/ | tr -s '\n' ' ' | grep -so 'p>$.*$</p' | sed -n 's/..$.*$..../\1/p'

sragu · 2010-08-02 03:20:32 3
count number of CPU available for members of a given Virtual Organization

Of course, this command must be executed at a GRID User Interface lhcb - name of your VO, substitute it with the one you are interested it. Show Sample Output
This is sample output - yours may be different.
```
1388123
```
-2

echo `lcg-infosites --vo lhcb ce | cut -f 1| grep [[:digit:]]| tr '\n' '+' |sed -e 's/\ //g' -e 's/+$//'`|bc -l

kbat · 2010-11-10 15:06:00 3
Removing accents in name files
This is sample output - yours may be different.
-2

IFS=?" ; for i in * ; do mv -v $i `echo $i|tr ???????????????????\ aaaeeiooAAAEEIOOOcC_` ; done

valessiobrito · 2011-08-11 04:20:55 4
Generate an XKCD #936 style 4 word password

The first grep rejects capitalised words since the dict has proper nouns in it that you mightn't want to use. The second grep rejects words with ending in apostrophe s, and the third forces the words to be at least 15 characters long. Show Sample Output
This is sample output - yours may be different.
```
counterproductive unreasonableness multimillionaires extemporaneously
```
-2

cat /usr/share/dict/words | grep -P ^[a-z].* | grep -v "'s$" | grep -Pv ^.\{1,15\}$ | shuf -n4 | tr '\n' ' ' | sed 's/$/\n/'

bugmenot · 2011-08-15 01:03:48 6
Find out local DISPLAY number

Not always does Xorg run on :0. For times like those, this script allows you to find out which it is.
This is sample output - yours may be different.
-2

export DISPLAY=$(tr '\000' '\n' < /proc/`pidof Xorg`/cmdline | egrep '^:[0-9]+')

oernii2 · 2012-12-18 07:26:16 6
Get the /dev/disk/by-id fragment for a physical drive

This was tested on Ubuntu 12.04 (Precise) LTS Server. It returns the name of the symlink within /dev/disk/by-id for the physical drive you specify. Change /dev/sda to the one you want, and replace ata- with scsi- or the appropriate type for your drive. I used this to pre-configure grub-pc during a non-interactive install because I had to tell it which disk to install grub on, and physical disks don't have a UUID such as that blkid provides.
This is sample output - yours may be different.
-2

ls -l /dev/disk/by-id | egrep ata-.*`hdparm -i /dev/sda | grep SerialNo | sed 's/.*SerialNo=//' | tr -d "\n"`.*sda$ | sed -e 's/.*ata-/ata-/' -e 's|[ ].*||' | tr -d "\n"

wizonesolutions · 2013-01-07 10:20:25 6
Generrate Cryptographically Secure RANDOM PASSWORD

Change :alnum: to :graph: for all printable characters Show Sample Output
This is sample output - yours may be different.
```
FH170AB1DXb4dHlX
```
-2

cat /dev/urandom |tr -c -d '[:alnum:]'|head -c 16;echo

AndrewM · 2019-06-17 17:51:04 36
remove unneeded configuration files in debian

This will, for an application that has already been removed but had its configuration left behind, purge that configuration from the system. To test it out first, you can remove the last -y, and it will show you what it will purge without actually doing it. I mean it never hurts to check first, "just in case." ;)
This is sample output - yours may be different.
-3

dpkg-query -l| grep -v "ii " | grep "rc " | awk '{print $2" "}' | tr -d "\n" | xargs aptitude purge -y

thepicard · 2009-04-28 19:25:53 11
YES = NO
This is sample output - yours may be different.
-3

yes | tr 'y' 'n'

Diluted · 2009-08-21 18:34:52 4
generate random password

eliminates "l" and "o" characters change length by changing 'x' here: cut -c 1-x Show Sample Output
This is sample output - yours may be different.
```
d6pd9625
```
-3

openssl rand -base64 1000 | tr "[:upper:]" "[:lower:]" | tr -cd "[:alnum:]" | tr -d "lo" | cut -c 1-8 | pbcopy

_eirik · 2009-12-29 17:18:25 31
Find files and list them with a readable informative output
This is sample output - yours may be different.
-3

find . -type f | sed 's,.*,stat "&" | egrep "File|Modify" | tr "\\n" " " ; echo ,' | sh | sed 's,[^/]*/$.*$. Modify: $....-..-.. ..:..:..$.*,\2 \1,' | sort

pepin · 2010-05-27 22:30:18 3
Get the mac address of eth0 in uppercase minus the colons

This will get the mac address of the eth0 and change lowercase to uppercase. The sed command removed the colons.
This is sample output - yours may be different.
-3

ifconfig eth0 | grep 'HWaddr' | awk '{print $5}' | tr 'a-z' 'A-Z' | sed -e 's/://g'

minigeek · 2010-06-26 05:35:03 3
Replace spaces in filename

all files in the directory get moved, in doing so the new name of the file is the original name with out spaces (using translate command)
This is sample output - yours may be different.
-3

ls | while read -r FILE; do mv -v "$FILE" `echo $FILE | tr -d ' '`; done

IgnitionWeb · 2010-08-14 14:10:48 33
Remove spaces and convert to lowercase filename with a certain extension, to be saved and called as a script with the extension as an argument.
This is sample output - yours may be different.
-3

for i in ./*.$1; do mv "$i" `echo $i | tr ' ' '_'`; done for i in ./*.$1; do mv "$i" `echo $i | tr '[A-Z]' '[a-z]'`; done for i in ./*.$1; do mv "$i" `echo $i | tr '-' '_'`; done for i in ./*.$1; do mv "$i" `echo $i | tr -s '_' `; done

amnesiac · 2010-11-14 14:31:13 6
mural graffiti

apt install toilet toilet-fonts # replace 'tput setaf 1' with 'tput setaf 9' to change color
This is sample output - yours may be different.
-3

tput setaf 1;tput rev;h=$(tput lines);w=$[$(tput cols)/6];c=$(seq -ws '_____|' $[$w+1]|tr -d "0-9");for a in $(seq $[$h/2]);do echo $c;echo ${c//|___/___|};done;tput cup 0;toilet -t -f bigmono12 "?LOVE";tput cup $h

knoppix5 · 2020-11-01 13:31:31 377
count occurences of each word in novel David Copperfield

This command might not be useful for most of us, I just wanted to share it to show power of command line. Download simple text version of novel David Copperfield from Poject Gutenberg and then generate a single column of words after which occurences of each word is counted by sort | uniq -c combination. This command removes numbers and single characters from count. I'm sure you can write a shorter version. Show Sample Output
This is sample output - yours may be different.
```
aback	1
abandon	6
abandoned	13
abase	1
abased	1
abashed	7
abated	1
abatement	1
...
```
-4

wget -q -O- http://www.gutenberg.org/dirs/etext96/cprfd10.txt | sed '1,419d' | tr "\n" " " | tr " " "\n" | perl -lpe 's/\W//g;$_=lc($_)' | grep "^[a-z]" | awk 'length > 1' | sort | uniq -c | awk '{print $2"\t"$1}'

alperyilmaz · 2009-05-04 16:00:39 11
This generates a unique and secure password with SALT for every website that you login to

This is a safest variation for "sitepass function" that includes a SALT over a long loop for sha512sum hash Show Sample Output
This is sample output - yours may be different.
```
sitepass2 mypassword www.commandlinefu.com
GL5/Ry1bG8&@w`
```
-4

sitepass2() {salt="this_salt";pass=`echo -n "$@"`;for i in {1..500};do pass=`echo -n $pass$salt|sha512sum`;done;echo$pass|gzip -|strings -n 1|tr -d "[:space:]"|tr -s '[:print:]' |tr '!-~' 'P-~!-O'|rev|cut -b 2-15;history -d $(($HISTCMD-1));}

Soubsoub · 2010-12-09 08:42:24 4
Random Password Generator (uses all chars, no repeated chars)

Generates a password using symbols, alpha, and digits. No repeating chars. Show Sample Output
This is sample output - yours may be different.
```
Tx(%FB'9u3&f@Pt0h#iH"y2R4s!r$8q6cwE1bD5eU)7YgXavAIpGSdQWV`C
```
-4

for i in {21..79};do echo -e "\x$i";done | tr " " "\n" | shuf | tr -d "\n"

hunterm · 2011-04-14 01:43:40 7
Recursively grep a subdirectory for a list of files

This command will grep the entire directory looking for any files containing the list of files. This is useful for cleaning out your project of old static files that are no longer in use. Also ignores .svn directories for accurate counts. Replace 'static/images/' with the directory containing the files you want to search for. Show Sample Output
This is sample output - yours may be different.
```
select-button.gif [1]
select-top.png [1]
tab.png [0]
Thumbs.db [0]
```
-5

ls -1 static/images/ | while read line; do echo -n $line' '[; grep -rc $line *|grep -v ".svn"|cut -d":" -f2|grep -vc 0| tr "\n" -d; echo -n ]; echo ; done

psytek · 2009-03-20 20:33:36 14
ROT13 using the tr command

Will rot 13 whatever parameter follows 'rot13', whether it is a string or a file. Additionally, it will rot 5 each digit in a number
This is sample output - yours may be different.
-5

function rot13 { if [ -r $1 ]; then cat $1 | tr '[N-ZA-Mn-za-m5-90-4]' '[A-Za-z0-9]'; else echo $* | tr '[N-ZA-Mn-za-m5-90-4]' '[A-Za-z0-9]'; fi }

twjolson · 2011-03-18 09:59:41 4
get you public ip address
This is sample output - yours may be different.
-11

/usr/bin/lynx -dump http://www.netins.net/dialup/tools/my_ip.shtml | grep -A2 "Your current IP Address is:" | tail -n1 | tr -d ' '|sed '/^$/d'| sed 's/^ *//g'

juanmi · 2010-12-20 15:29:53 4
List system's users
This is sample output - yours may be different.
-12

teste.txt < cut -d : -f 1,5 /etc/passwd | tr : \\t | tr a-z A-Z | cat teste.txt

osvaldofilho · 2009-10-20 14:53:38 9
‹ First < 12 13 14

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Get the Nth argument of the last command (handling spaces correctly)

Bash's history expansion character, "!", has many features, including "!:" for choosing a specific argument (or range of arguments) from the history. The gist is any number after !: is the number of the argument you want, with !:1 being the first argument and !:0 being the command. See the sample output for a few examples. For full details search for "^HISTORY EXPANSION" in the bash(1) man page. Note that this version improves on the previous function in that it handles arguments that include whitespace correctly.

prevents replace an existing file by mistake

Use set +o noclobber and you will be able to replace files again

Get the IP address of a machine. Just the IP, no junk.

Why use many different utilities all piped together, when you only need two?

Make changes in .bashrc immediately available

Simply sourcing .bashrc does not function correctly when you edit it and change an alias for a function or the other way round with the *same name*. I therefor use this function. Prior to re-sourcing .bashrc it unsets all aliases and functions.

get the oldest file in a directory

reverse the sorting of ls to get the newest file: $ls -1tr --group-directories-first /path/to/dir/ | tail -n 1 Problems: If there are no files in the directory you will get a directory or nothing.

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" }

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"

Don't save commands in bash history (only for current session)

Unsetting HISTFILE avoid getting current session history list saved.

Create a QR code image in MECARD format

Add the QR code image on your webpage, business card ., etc, so people can scan it and quick add to their Contact Address Book. Tested on iPhone with QRreader.

Use mplayer to save video streams to a file

I use this command to save RTSP video streams over night from one of our national TV stations, so I won't have to squeeze the data through my slow internet connection when I want to watch it the next day. For ease of use, you might want to put this in a file: #!/bin/bash FILE="`basename \"$1\"`" mplayer -dumpstream -dumpfile "$FILE" -playlist "$1"

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Commands using tr (349)

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