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commandlinefu.com is the place to record those command-line gems that you return to again and again.

Delete that bloated snippets file you've been using and share your personal repository with the world. 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.

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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!

Top Tags



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:

  • » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
  • » If you wish to use your user account, you will probably need to reset your password.
Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

All commands from sorted by
Terminal - All commands - 12,363 results
echo "1 BTC = $(curl -s https://api.coindesk.com/v1/bpi/currentprice/usd.json | grep -o 'rate":"[^"]*' | cut -d\" -f3) USD"
wget https:[email protected]/holy-fsck-a-contest-cd320952726b
2015-09-18 23:57:23
User: jonhendren
Functions: wget
Tags: CLFUContest

Here?s the idea: Submit a one-liner that returns a value or string usable for monitoring something. The more interesting/important, the better.

Tag your one-liners with CLFUContest to enter. Whether you?re participating or not, be sure to vote on the other submissions. The top 5 contest entries by vote count will receive a $10 Amazon gift certificate. On top of that, we?ll select our 3 favorite entries to receive $25 Amazon gift certificates. The prizes might even overlap! Feel free to enter as many times as you like. Check out the URL above for the fine print.


wget -q -O - ifconfig.co
du -h --max-depth=1 /home/ | sort -n
-A INPUT -p tcp --dport 22 -m mac --mac-source 3E:D7:88:A6:66:8E -j ACCEPT
2015-09-17 14:51:47
User: erez83

-A INPUT -p udp -m udp --dport 10000:66000 -m mac --mac-source 3E:D7:88:A6:66:8E -j ACCEPT

-A INPUT -p udp -m udp --dport 5060 -m mac --mac-source 3E:D7:88:A6:66:8E -j ACCEPT

-A INPUT -p tcp --dport 22 -m mac --mac-source 3E:D7:88:A6:66:8E -j ACCEPT

curl $1 | grep -E "http.*\.mp3" | sed "s/.*\(http.*\.mp3\).*/\1/" | xargs wget
2015-09-17 13:19:53
User: theodric
Functions: grep sed xargs

The difference between the original version provided and this one is that this one works rather than outputting a wget error

du -sh * | sort -h
du -x --max-depth=1|sort -rn|awk -F / -v c=$COLUMNS 'NR==1{t=$1} NR>1{r=int($1/t*c+.5); b="\033[1;31m"; for (i=0; i<r; i++) b=b"#"; printf " %5.2f%% %s\033[0m %s\n", $1/t*100, b, $2}'|tac
2015-09-12 10:36:49
Functions: awk du printf sort

A more efficient way, with reversed order to put the focus in the big ones.

tr -d "\"" < infile.csv > noquotes.csv
2015-09-11 23:41:48
User: UnklAdM
Functions: tr
Tags: CSV quotes

I always forget this one and find all kinds of complex solutions on google. Also works great while piping data. ex. 'cat data | process-data | tr -d "\"" > processed-data-without-quotes'

ffgif() { p="fps=10,scale=${4:-320}:-1:flags=lanczos"; ffmpeg -y -ss ${2:-0} -t ${3:-0} -i "$1" -vf ${p},palettegen .p.png && ffmpeg -ss ${2:-0} -t ${3:-0} -i "$1" -i .p.png -filter_complex "${p}[x];[x][1:v]paletteuse" "${1%.*}".gif && rm .p.png; }
2015-09-08 21:13:17
User: snipertyler
Functions: rm

I had to compress it a bit to meet the 255 limit. See sample for full command (274)


ffgif foo.ext

Supports 3 arguments (optional)

ffgif filename seek_time time_duration scale

ffgif foo 10 5 320 will seek 10 seconds in, convert for 5 seconds at a 320 scale.

Default will convert whole video to gif at 320 scale.

Inspiration - http://superuser.com/questions/556029/how-do-i-convert-a-video-to-gif-using-ffmpeg-with-reasonable-quality/556031#556031

perl -ne [email protected]=split(/,/); $b=0; foreach $r (1..$#a){ $b+=$a[$r] } print "$a[0],$b\n"' -f file.csv
2015-09-04 21:05:56
User: miniker84
Functions: perl

For all lines, sum the columns following the first one, and then print the first column plus the sum of all the other columns.

example input:






curl ifconfig.co/all.json
curl ifconfig.co
nohup bash example.sh 2>&1 | tee -i i-like-log-files.log &
nohup exemplo.sh &
sudo sh -c 'printf "[SeatDefaults]\nallow-guest=false\n" >/usr/share/lightdm/lightdm.conf.d/50-no-guest.conf'; sudo sh -c 'printf "[SeatDefaults]\nallow-guest=false\n" >/usr/share/lightdm/lightdm.conf.d/50-guest-wrapper.conf'
2015-08-31 18:12:21
User: andregyn62
Functions: sh sudo

This command will disable a guest user logon, this user don't have password to login in the system.

sed -e "s/[^/]*\/\/\([^@]*@\)\?\([^:/]*\).*/\2/"
: </dev/tcp/
2015-08-28 19:07:27
User: zlemini

For times when netcat isn't available.

Will throw a Connection refused message if a port is closed.


(: </dev/tcp/ &>/dev/null && echo "OPEN" || echo "CLOSED"
sed 's/,/\n/g;q' file.csv | nl
2015-08-26 11:38:56
User: flatcap
Functions: sed
Tags: sed nl

Take the header line from a comma-delimited CSV file and enumerate the fields.


First sed replaces all commas with newlines


Then sed quits (q) after the first line.

Finally, nl numbers all the lines

awk -F, '{gsub(/ /,"");for(f=1;f<=NF;f++) print f,$f;exit}' file.csv
2015-08-26 09:30:43
User: sesom42
Functions: awk


use , as field separator


deletes all spaces


loops over all input fields and print their index and value


exit after first line

head -1 file.csv | tr ',' '\n' | tr -d " " | awk '{print NR,$0}'
2015-08-26 05:46:15
User: neomefistox
Functions: awk head tr

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.

stat -c'%s %n' **/* | sort -n
python -c "import requests; from bs4 import BeautifulSoup; print '\n'.join([cmd.text for cmd in BeautifulSoup(requests.get('http://www.commandlinefu.com/commands/by/${USER}').content, 'html.parser').find_all('div','command')])"
2015-08-22 21:32:36
User: funky
Functions: python

This utilizes the Requests and BeautifulSoup libraries in Python to retrieve a user page on commandlinefu, parse it (error-tolerant) and extract all the lines of the following format:

gzip *

To print them, a list comprehension is used to iterate over the values, and join() is called on a newline character.

sudo apt-get install ufraw
2015-08-20 20:37:00
User: dnlcorrea
Functions: install sudo

Convert RAW files (eg. .CR2) to JPEGs, PNGs and whatnot.

2015-08-19 20:57:09
User: adeverteuil
Tags: exit mc

For those who like to hit instead of typing "exit" to leave the shell and find it annoying that it doesn't work in Midnight Commander, just press to switch to the subshell and now you can leave with