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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 - 12,407 results
python -c "import csv,json;print json.dumps(list(csv.reader(open('csv_file.csv'))))"
2017-05-17 19:35:53
User: malathion
Functions: python
Tags: CSV python json

Replace 'csv_file.csv' with your filename.

ps aux | awk '{if ($8 ~ "D") print $0}'
find / -type d | while read i; do ls $i | wc -l | tr -d \\n; echo " -> $i"; done | sort -n
2017-05-12 00:02:43
User: Zort
Functions: echo find ls read sort tr wc

Show file count into directories.

Usefull when you try to find hugh directories that elevate system CPU (vmstat -> sy)

ffmpeg -i input.flv -vf scale=320:-1 -r 10 -f image2pipe -vcodec ppm - | convert -delay 5 -loop 0 - output.gif
2017-05-04 16:28:48
User: hadifarnoud

you can use any common video format. if you don't need to change the size of gif output, just remove `-vf scale=320:-1`

btw, 320:-1 means width is 320px and height would be set automatically

sudo systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target
2017-04-28 19:49:36
User: symgryph
Functions: sudo

This causes computer to never power off or go into sleep mode. Disables sleep mode linux.

pmset -g batt | awk '/^ /{print $5}'
printf "%x\n" $(seq 0 255) | xargs -n1 -IH echo -ne \\xH > test.dat
youtube-dl --list-formats <URL>; youtube-dl -f <STREAM_ID> -g <URL>
exec 0</dev/tty
2017-04-12 21:23:40
User: pdxdoughnut
Functions: exec

This will grab the controlling tty regardless of what STDOUT and STDERR are doing.

[ ! -t 0 ] && [ -t 1 ] && exec 0<&1
2017-04-12 00:10:27
User: pdxdoughnut
Functions: exec

Tests to see if stdin (0) is NOT a terminal.

Tests to see if stdout (1) IS a terminal.

Copies stdout (opened for write) to stdin (open for read).

soxi -D * | awk '{SUM += $1} END { printf "%d:%d:%d\n",SUM/3600,SUM%3600/60,SUM%60}'
function cdb() { select dir in $(find -type d -name "$1" -not -path '*/\.*' -prune); do cd "${dir}" && break; done }
sudo security delete-certificate -c 1000-sans.badssl.com
2017-04-06 01:40:04
User: lgarron
Functions: sudo

Use `security list-keychains` to find possible keychains, and `security dump-keychain` to look for certificates.

`sudo security delete-certificate` without arguments shows options for removing: by common name or by SHA-1 hash.

This is especially useful if a certificate locks up Keychain Access.app, which happens for certificates with many SANs in macOS 10.12.

Found via: http://stackoverflow.com/a/16019443

cat externs.json | jq ".efExports | .[] | (keys|.[0]) as \$kind | {kind:\$kind,value:(.[\$kind] |.Ident?)}"
grep -i s2enc /etc/vcac/server.xml | sed -e 's/.* password=\"\([^\"]*\)\".*/\1/' | xargs -n 1 vcac-config prop-util -d --p 2>/dev/null; echo
ps -ef | grep [p]mon | awk '{print $2}' | xargs -I {} ps eww {} | awk '{print $1 " " $5 " " $6 " " $0}' | sed 's/\(S*\) \(S*\) .*ORACLE_HOME/\1 \2/g' | cut -f1,2,3 -d" "
2017-03-24 18:45:40
User: Enirevlow
Functions: awk cut grep ps sed xargs

Show the executable that spawned the process and show the PID and ORACLE_HOME relative to the environment within which the process is running.

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" }
2017-03-21 23:31:25
User: pdxdoughnut
Functions: echo printf

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"


shebang () { printf '%s\n' 0a '#!'"$1" . w | ed -s "$2" ; }
2017-03-20 19:14:41
User: zlemini
Functions: ed printf

Function to add a shebang to an existing script, handy if you forgot to add it in the first place.

find . -type f ! -path "./.git/*" -exec sh -c "head -n 1 {} | egrep -a 'bin/bash|bin/sh' >/dev/null" \; -print -exec shellcheck {} \;
2017-03-16 08:43:56
User: brx75x
Functions: find sh

This is a commodity one-liner that uses ShellCheck to assure some quality on bash and sh scripts under a specific directory. It ignores the files in .git directory.

Just substitute "./.git/*" with "./.svn/*" for older and booring centralized version control.

Just substitute ShellCheck with "rm" if your scripts are crap and you want to get rid of them :)

videospeed() { vname="$1"; speedc="$2"; vs=$(python3 -c "print(1/$speedc)"); aspeed=$(python3 -c "print(1*$speedc)"); ffmpeg -i "$vname" -filter:a "atempo=$aspeed" -filter:v "setpts=$vs*PTS" "${3:-converted_$1}"; }
2017-03-07 22:44:06
User: snipertyler


videospeed video_filename speedchange newfilename

videospeed foo.mp4 0.5 foo_slow.mp4

Range of 0.5 (50%) - 2.0 (200%) is valid.

lc() { od="$1"; nd="$2"; of=$3; nf=$4; cp -rl "$od" "$nd"; parallel -0 "ffmpeg -i {1} -loglevel error -q:a 6 {1.}.{2} && { rm {1}; echo {1.}.{2}; }" :::: <(find "$nd" -type f -iname \*$of -print0) ::: "$nf"; }
2017-03-02 17:37:34
User: snipertyler
Functions: cp find

Uses parallel processing

Reiteration of my earlier command



lc Old_Directory New_DIrectory Old_Format New_Format

lc ~/Music ~/Music_ogg mp3 ogg

sudo pv -tpreb /path/to/source | sudo dd bs=4096 of=/path/to/destination
2017-03-01 19:11:57
Functions: dd sudo

Uses the pv utility to show progress of data transfer and an ETA until completion.

You can install pv via Homebrew on macOS

tar -zcvf archive-name.tar.gz directory-name
wait_for_this.sh; echo "wait_for_this.sh finished running" | mail -s "Job Status Update" [email protected]
rename 's/^hospital\.php\?loc=(\d{4})$/hospital_$1/' hospital.php*