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2011-03-12 - Confoo 2011 presentation
Slides are available from the commandlinefu presentation at Confoo 2011: http://presentations.codeinthehole.com/confoo2011/
2011-01-04 - Moderation now required for new commands
To try and put and end to the spamming, new commands require moderation before they will appear on the site.
2010-12-27 - Apologies for not banning the trolls sooner
Have been away from the interwebs over Christmas. Will be more vigilant henceforth.
2010-09-24 - OAuth and pagination problems fixed
Apologies for the delay in getting Twitter's OAuth supported. Annoying pagination gremlin also fixed.




Commands using grep from sorted by
Terminal - Commands using grep - 1,519 results
udevadm info -q all -n /dev/sdb | grep ID_PATH | cut -d'-' -f 2 | xargs -n 1 lspci -s
echo "Memory:" $(dmidecode --type memory | grep " MB" | awk '{sum += $2; a=sum/1024} END {print a}') "GB"
find . -exec grep -Hn what \{\} \; | less
2014-02-17 09:59:01
User: ynedelchev
Functions: find grep what

This command will traverse all of the folders and subfolders under current working directory. For every file inside it, it will do a search inside the content of the file for a specific term 'what'. Then it will print a list of the lines that contain that term (and match that pattern). Each matching line will be preceded with the path and name to the file and then the line number iside taht file wehre the pattern was found. Then the actual content of the matching lien will be printed.

The output will be piped throug less, so that the user can scroll through it if it goes beyond the limits of the current display window.

find . -name *.properties -exec /bin/echo {} \; -exec cat {} \; | grep -E 'listen|properties'
YYYY=2014; MM=02; for d in $(cal $MM $YYYY | grep "^ *[0-9]"); do DD=$(printf "%02d" $d); echo $YYYY$MM$DD; done
2014-02-06 11:31:57
User: fibo
Functions: cal echo grep printf
Tags: cal for loop

Edit YYYY and MM at the beginning of the command with the year and month you want.

Note that `DD=$(printf "%02d" $d)` will pad single digit integers with a leading zero.

Substitute `echo $YYYY$MM$DD` at the end of the line with the command you want to launch, for instance

script.pl --yyyymmdd $YYYY$MM$DD

lsblk | grep <mountpoint>
npm ls -g|grep "^[&#9500;&#9492;]\(.\+\)\?[&#9516;&#9472;] "
ls | tr [:upper:] [:lower:] | grep -oP '\.[^\.]+$' | sort | uniq -c | sort
2014-01-30 11:37:27
User: icefyre
Functions: grep ls sort tr uniq

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)

lsof -c diff -o -r1 | grep $file
2014-01-29 18:35:28
User: d0g
Functions: diff grep

When running a long `diff -r` over folders, this simulates a "verbose" mode where you can see where diff is in the tree.

Replace $file with the first part of the path being compared.

dpkg -l linux-* | awk '/^ii/{ print $2}' | grep -v -e `uname -r | cut -f1,2 -d"-"` | grep -e [0-9] | xargs sudo apt-get -y purge
wget -q -O- http://bitinfocharts.com/markets/btc-e/btc-usd.html |grep -o -P 'lastTrade">([0-9]{1,})(.){0,1}[0-9]{0,}' |grep -o -P '(\d)+(\.){0,1}(\d)*' |head -n 1
sysctl -a | grep boottime | head -n 1
diff <(cat /etc/fstab | grep vol | grep -v "^#" | awk '{print $1}') <(df -h | grep vol)
2014-01-23 15:18:08
User: Koobiac
Functions: awk cat df diff grep
Tags: diff fstab df

With this command, you can check the difference between the volumes mounted and the volume in /etc/fstab.

grep -v rootfs /proc/mounts > /etc/mtab
IFS=$(echo -en "\n\b"); mkdir Epub; for i in `find . | grep epub`; do echo "epub: $i"; mv -v "$i" Epub; done
gem list | cut -d" " -f1 | grep --invert-match "test-unit\|psych\|io-console\|rdoc\|json\|bigdecimal\|rake\|minitest" | xargs gem uninstall -aIx
2014-01-10 10:58:59
User: gdelfino
Functions: cut grep xargs

This command removes all ruby gems except the default ones that can not be removed. It is based on http://geekystuff.net/2009/01/14/remove-all-ruby-gems/

ls --color=never -1| grep -E "[0-9]{4}"|sed -re "s/^(.*)([0-9]{4})(.*)$/\2 \1\2\3/" | sort -r
ps -eo pmem,comm | grep chrome | cut -d " " -f 2 | paste -sd+ | bc
2014-01-03 15:33:16
User: Darkstar
Functions: cut grep paste ps

This command will show the sum total of memory used in gigabytes by a program that spawns multiple instances of itself. Replace chrome with whatever program's memory usage you are investigating. This command is rather useless on software that only spawns a single instance of itself.

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

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".

bind -P | grep -v "is not" | sed -e 's/can be found on/:/' | column -s: -t
2013-12-19 12:30:19
User: leni536
Functions: column grep sed

Shows all available keyboard bindings in bash. Pretty printing.

curl -s -k https://www.kernel.org/feeds/kdist.xml | sed -n -e 's@.*<guid>\(.*\)</guid>.*@\1@p' | grep 'stable' | head -1 | awk -F , '{print $3}'
2013-12-17 23:59:27
User: Wafelijzer
Functions: awk grep head sed
Tags: kernel

Fetches latest stable release version from first entry between tags

find */*.c | xargs grep 'mcs'
git status -s | grep -o ' \S*php$' | while read f; do php -l $f; done
2013-12-14 11:47:54
User: ruslan
Functions: grep read
Tags: git PHP lint

Checks for syntax errors in PHP files modified in current working copy of a Git repository.

ram() { mt=/mnt/ram && grep "$mt" < /proc/mts > /dev/null; if [ $? -eq 0 ] ; then read -p"Enter to Remove Ram Partition ";sudo umount "$mt" && echo $mt 0; else sudo mt -t tmpfs tmpfs "$mt" -o size=$(( ${1:-1} * 1024 ))m && echo $mt '-' "${1:-1}"gb; fi; }
2013-12-13 05:22:02
User: snipertyler
Functions: echo grep mt read sudo umount
Tags: sudo ram tmpfs

Creates a temporary ram partition

To use:

ram 3

to make a 3gb partition (Defaults to 1gb)

grep -c "search_string" /path/to/file
2013-12-10 18:13:54
User: meatflag
Functions: grep

-c will count the number of times your search matches in the file.