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May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!
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awk, bash, curl, find, grep, Linux, sed
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Maintained by Jon H.

Site originally by David Winterbottom (user root).

Psst. Open beta.

Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:

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Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

Commands using tr from sorted by
Terminal - Commands using tr - 288 results
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;}
2014-04-20 18:43:21
User: bigstupid
Functions: awk df echo grep tail tr
Tags: aix lvm SAN odm
0
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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 | Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
grep URL ~/annex/.git/annex/webapp.html | tr -d '">' | awk -F= '{print $4 "=" $5}'
2014-04-20 08:46:37
User: kseistrup
Functions: grep tr
Tags: awk grep tr git-annex
0
Up
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Get the URL for the git-annex webapp
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< /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c${1:-16};echo;
2014-04-07 10:07:22
User: opexxx
Functions: head tr
0
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16 Character Random Password

This snippet will produce an alpha-numeric 16 character password

Show sample output | Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
echo $(sudo lshw -businfo | grep -B 1 -m 1 $(df "/path/to/file" | tail -1 | awk '{print $1}' | cut -c 6-8) | head -n 1 | awk '{print $1}' | cut -c 5- | tr ":" "-") | sudo tee /sys/bus/usb/drivers/usb/unbind
2014-04-06 12:06:29
User: tweet78
Functions: awk cut df echo grep head sudo tail tee tr
Tags: usb filename filepath
30
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Given a file path, unplug the USB device on which the file is located (the file must be on an USB device !)

You have an external USB drive or key.

Apply this command (using the file path of anything on your device) and it will simulate the unplug of this device.

If you just want the port, just type :

echo $(sudo lshw -businfo | grep -B 1 -m 1 $(df "/path/to/file" | tail -1 | awk '{print $1}' | cut -c 6-8) | head -n 1 | awk '{print $1}' | cut -c 5- | tr ":" "-")

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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
2014-03-05 21:34:42
User: santizo
Functions: grep sed sort tr uniq
1
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Sort netflow packet capture

Sort netflow packet capture by unique connections excluding source port.

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cat /dev/urandom | env LC_CTYPE=C tr -dc a-zA-Z0-9 | head -c 16; echo
2014-02-05 15:04:07
User: yakovlev
Functions: cat env head tr
Tags: password random generate mac os x
2
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Generate random password on Mac OS X

Feel free to put this in your ~/.profile:

random(){ cat /dev/urandom | env LC_CTYPE=C tr -dc $1 | head -c $2; echo; }

Then use it to generate passwords:

random [:alnum:] 16

Or DNA sequences:

random ACGT 256
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ls | tr [:upper:] [:lower:] | grep -oP '\.[^\.]+$' | sort | uniq -c | sort
2014-01-30 11:37:27
User: icefyre
Functions: grep ls sort tr uniq
1
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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 | Comments (4) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
find . -type d -maxdepth 1 -print0 | xargs -0 -I{} sh -c 'find "{}" -type f | grep "ogg\|mp3\|wav\|flac$" | wc -l | tr -d "\n"; echo " {}"'
2013-12-22 13:40:29
User: dbrgn
Functions: echo find grep sh tr wc xargs
Tags: bash xargs music count
0
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Count music files in each directory

This lists the number of ogg/mp3/wav/flac files in each subdirectory of the current directory. The output can be sorted by piping it into "sort -n".

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for i in `seq 1 4096`; do tr -dc A-Za-z0-9 </dev/urandom | head -c8192 > dummy$i.rnd; done
2013-11-11 21:27:15
User: TuxOtaku
Functions: head tr
Tags: random for loop dummy file, null file, test file /dev/urandom
1
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Create a bunch of dummy text files
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echo $(< /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c10)
2013-11-07 21:51:38
User: santizo
Functions: echo head tr
0
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Generate a random password.

Uses urandom and tr to generate a random password. Change the value of head -c## for the lenght of the password.

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(sed 's/#.*//g'|sed '/^ *$/d'|tr '\n' ';'|xargs echo) < script.sh
2013-10-26 23:23:51
User: knoppix5
Functions: sed tr xargs
5
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Convert a script to one-liner

Opposite:

Convert an one-liner to script:

foo() { <one-liner> ; }

...

typeset -f foo

...

unset -f foo
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openssl rand -hex 1 | tr '[:lower:]' '[:upper:]' | xargs echo "obase=2;ibase=16;" | bc | cut -c1-6 | sed 's/$/00/' | xargs echo "obase=16;ibase=2;" | bc | sed "s/$/:$(openssl rand -hex 5 | sed 's/\(..\)/\1:/g; s/.$//' | tr '[:lower:]' '[:upper:]')/"
2013-10-22 08:40:46
User: 4fd
Functions: bc cut echo sed tr xargs
0
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Generate a Random (unicast) MAC address

I did not come up with this one myself, but found this somewhere else several months ago.

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t2s() { wget -q -U Mozilla -O $(tr ' ' _ <<< "$1"| cut -b 1-15).mp3 "http://translate.google.com/translate_tts?ie=UTF-8&tl=en&q=$(tr ' ' + <<< "$1")"; }
2013-10-16 23:29:59
User: snipertyler
Functions: cut tr wget
Tags: google google api speech text-to-speech text to speech
13
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Google text-to-speech in mp3 format

Usage: t2s 'How are you?'

Nice because it automatically names the mp3 file up to 15 characters

Modified (uses bash manip instead of tr)

t2s() { wget -q -U Mozilla -O $(cut -b 1-15

Comments (7) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
(date "+%d-%m-%Y %H:%M:%S";curl -s --interface lo:1 ifconfig.me| xargs -t geoiplookup 2>&1)|sed -e 's/geoiplookup/IP:/g' -e 's/GeoIP Country Edition/Country/g'|tr -s "\n" " "|sed 'a\ '
2013-10-07 15:28:55
User: guerito
Functions: date sed tr xargs
0
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Localize a Public IP on a specific interface

My first command :) I made this command to log public addresses of a virtual interface who connects random VPN servers around the world.

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shuf /usr/share/dict/words |grep "^[^']\{3,6\}$" |head -n4 | sed -e "s/\b\(.\)/\u\1/g" | tr -d '\n'; echo
2013-09-06 03:05:31
User: chijonutor
Functions: grep head sed tr
Tags: tr xkcd shuf
0
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Generate an XKCD #936 style 4 word password

Took one of the samples, added capitalization and removes in between spaces.

The final "echo" is just for readability.

Cheers

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shuf -n4 /usr/share/dict/words | tr '\n' ' '
2013-07-28 13:04:06
User: nst
Functions: tr
Tags: tr xkcd shuf
0
Up
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Generate an XKCD #936 style 4 word password
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sudo /usr/sbin/exim -bp | sed -n '/\*\*\* frozen \*\*\*/,+1!p' | awk '{print $1}' | tr -d [:blank:] | grep @ | sort | uniq -c | sort -n
2013-06-04 10:49:14
User: blueskin
Functions: awk grep sed sort sudo tr uniq
Tags: mail exim mailq
0
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Show counts of messages in exim mail queue, grouped by recipient

Counts of messages by recipient, with frozen messages excluded.

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curl -s http://www.reddit.com/user/$USER/about.json | tr "," "\n" | grep "link_karma" | tr ": " "\n" | grep -E "[0-9]+" | sed s/"^"/"Link Karma: "/
2013-05-13 15:36:59
User: iiAtlas
Functions: grep sed tr
Tags: curl
0
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Fetches a Reddit user's ($USER) link karma

Replace $USER with the username of the Reddit user in question. To get comment karma instead run...

curl -s http://www.reddit.com/user/$USER/about.json | tr "," "\n" | grep "comment_karma" | tr ": " "\n" | grep -E "[0-9]+" | sed s/"^"/"Comment Karma: "/
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echo lowercaseword | tr '[a-z]' '[A-Z]'
2013-05-11 11:08:37
User: eastwind
Functions: echo tr
-1
Up
Down
convert a string from lower case into uppercase
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svn ls -R | egrep -v -e "\/$" | tr '\n' '\0' | xargs -0 svn blame | awk '{print $2}' | sort | uniq -c | sort -nr
2013-04-10 19:37:53
User: rymo
Functions: awk egrep ls sort tr uniq xargs
Tags: svn count
1
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Prints total line count contribution per user for an SVN repository

make usable on OSX with filenames containing spaces. note: will still break if filenames contain newlines... possible, but who does that?!

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rsync --progress [email protected]:/path/to/source /path/to/target/ | stdbuf -oL tr '\r' '\n' >> rsyncprogress.txt
2013-03-26 11:06:45
User: MessedUpHare
Functions: rsync tr
Tags: rsync tr progress stdbuf unbuffer
0
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make rsync progress output suitable for shell script reading

This line unbuffers the interactive output of rsync's --progress flag

creating a new line for every update.

This output can now be used within a script to make actions (or possibly piped into a GUI generator for a progress bar)

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tr -dc 'A-Za-z0-9!@#$%^&*' < /dev/urandom | fold -w 12 | head -n 1
2013-03-15 13:20:32
User: opexxx
Functions: fold head tr
1
Up
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Generate password
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tr '[:upper:]' '[:lower:]' < input.txt > output.txt
2013-03-14 19:14:09
User: jonatasnona
Functions: tr
-1
Up
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convert uppercase to lowercase
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dd if=/dev/urandom | tr -d -c [:print:] | tr -d " " | dd count=1 bs=20 2> /dev/null; echo
2013-03-01 22:42:29
User: Progent
Functions: dd tr
-1
Up
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Create random password in reasonable time

It will produce passwords with length of 20 printable characters within a reasonable time.

For shorter or longer passwords just change the 20 in bs=20 to something more convenient.

To create only alpha numeric passwords change [:print:] to [:alnum:]

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nmap -sP 192.168.0.* | grep Host | tr "(" ")" | cut -d\) -f2
2013-02-27 12:40:45
User: szimbaro
Functions: cut grep tr
0
Up
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Show alive host on network
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