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

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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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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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  • » 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 - 12,410 results
set -o vi
2009-12-22 20:40:10
User: andykazmaier
Functions: set
-3

Once issuing the command, hit "esc" and then "k" (not together) to enter the search mode at the shell prompt (each time), and invoke the search with "/" as if you would in vi. Type a command and see the most recently used instance of that command. Use "n" and "N" to go forward and backwards through other instances of that command.

favorite --add myhost 'ssh [email protected]'
2017-01-23 18:15:03
User: djangofan
Tags: history
-3

Command 'favorite' to store your favorite commands from history.

sfdisk /dev/sdb <(sfdisk -d /dev/sda| perl -pi -e 's/sda/sdb/g')
2009-12-22 22:45:41
Functions: perl
-3

*as long as the drives are exactly the same* then this command copies the partition table on /dev/sda to /dev/sdb

vboxmanage clonehd --format VMDK <source image|uuid> <destination image>
2010-10-04 16:42:12
User: dreffed
-3

This is based on the Windows Version of VirtualBox.

From the /? ...

VBoxManage clonehd |

[--format VDI|VMDK|VHD|RAW|]

[--variant Standard,Fixed,Split2G,Stream,ESX]

[--type normal|writethrough|immutable|shareable]

[--remember] [--existing]

From the online help..

http://www.virtualbox.org/manual/ch08.html#id2676537

VBoxManage clonehd

This command duplicates a registered virtual hard disk image to a new image file with a new unique identifier (UUID). The new image can be transferred to another host system or imported into VirtualBox again using the Virtual Media Manager; see the section called ?The Virtual Media Manager? and the section called ?Cloning disk images?. The syntax is as follows:

VBoxManage clonehd |

[--format VDI|VMDK|VHD|RAW|]

[--variant Standard,Fixed,Split2G,Stream,ESX]

[--type normal|writethrough|immutable]

[--remember]

where the parameters mean:

format

Allow to choose a file format for the output file different from the file format of the input file.

variant

Allow to choose a file format variant for the output file. It is a comma-separated list of variant flags. Not all combinations are supported, and specifying inconsistent flags will result in an error message.

type

Only honored if --remember is also specified. Defines what kind of hard disk type this image should be.

remember

Keep the destination image registered after it was successfully written.

curl ifconfig.me
2011-03-02 23:04:00
User: Honeypuck
-3

It takes a few seconds until it has figured out your public ip address. You need to have 'curl' installed of course.

vi -R filename
2009-03-04 06:56:40
User: haivu
Functions: vi
Tags: vim
-3

The -R flag prevents you from making changes to a file, useful when you only want to view the file. This command is nicer than the 'more' or 'less' commands because for source codes, vi shows syntax highlight.

for i in `find . | grep jar$`; do echo $i; jar tvf $i | grep 'search-string'; done;
for file in `find *| sort -n | sed 's% %?%g'`; do echo "${file//?/ }"; cp --parents "${file//?/ }" /destinity_folder/ ;done
find . -name .svn -type d | parallel rm -rf
wget -c -v -S -T 100 --tries=0 `curl -s http://ms1.espectador.com/ podcast/espectador/la_venganza_sera_terrible.xml | grep -v xml | grep link | sed 's/]*>//g'`
2009-03-04 13:12:28
User: fmdlc
Functions: grep link sed wget
-3

This download a complete audio podcast

find . -type f | sed 's,.*,stat "&" | egrep "File|Modify" | tr "\\n" " " ; echo ,' | sh | sed 's,[^/]*/\(.*\). Modify: \(....-..-.. ..:..:..\).*,\2 \1,' | sort
while true; do A=$(ls -l FILE | awk '{print $5}'); sleep 1; B=$(ls -l FILE | awk '{print $5}'); echo -en "\r"$(($B-$A))" Bps"; done
2016-06-27 20:33:02
User: Zort
Functions: awk echo ls sleep
-3

Muestra el crecimiento de un archivo por segundo.

Cambia el texto "FILE" por el nombre del archivo a monitorear.

Comando LS + AWK

for file in $(find -type f -iname "*wav"); do mv $file "$file"_orig.WAV; mplayer -ao pcm "$file"_orig.WAV -ao pcm:file=$file; done
alias clear='( for ((i=1;i<$LINES;i++)) ; do echo "" ; done ) ; clear'
2009-10-27 14:38:31
User: Marcio
Functions: alias echo
-3

If you receives a lot of compiling errors, type 'clear', then reedit your code and press "SHIFT+PGUP".

sed ?s/[sub_str]/[sub_str]\n/g? [text_file] | wc -l
for i in $(find . -mtime +30); do mv $i old/; done
2014-02-05 01:24:45
User: valferon
Functions: find mv
Tags: bash file
-3

Will move in that case every file in the current folder older than 30 days to the "old" folder

Replace "mv $i old/" by any command such as rm / echo to do something different.

du | sort -n | tail -11 | head
2009-03-04 16:06:34
User: phage
Functions: du sort tail
-3

The pipe to head removes the listing of . as the largest directory.

for files in $(ls -A directory_name); do sed 's/search/replaced/g' $files > $files.new && mv $files.new $files; done;
2009-05-07 20:13:07
User: bassu
Functions: ls mv sed
-3

Yeah, there are many ways to do that.

Doing with sed by using a for loop is my favourite, because these are two basic things in all *nix environments. Sed by default does not allow to save the output in the same files so we'll use mv to do that in batch along with the sed.

TIMEUNIT=$( cat a | grep -n "timescale" | awk -F ":" '{ print $1 } ' )
alias cn='cat > /dev/null'
2011-09-16 00:00:28
Functions: alias
-3

cn stands for "Cat Null"

.

The idea is that sometimes you run across something on maybe a webpage - like commandlinefu - that you want to try out on your terminal. You could put a '#' in and then paste it, but what if it is several lines?

.

This command will echo the pasted characters to the screen and divert them to the bit bucket.

.

Put this simple alias in your .bashrc, hit cn, paste away, and hit a ctrl+c or a ctrl+d when you are done to get your prompt back.

chown -R webuser:webgroup /var/www/vhosts/domain.com/httpdocs
gconftool-2 --set /apps/metacity/global_keybindings/panel_main_menu --type string "Super_L"
grep 'HOME.*' data.txt | awk '{print $2}' | awk '{FS="/"}{print $NF}' OR USE ALTERNATE WAY awk '/HOME/ {print $2}' data.txt | awk -F'/' '{print $NF}'
2009-03-05 07:28:26
User: rommelsharma
Functions: awk grep
-3

grep 'HOME.*' data.txt | awk '{print $2}' | awk '{FS="/"}{print $NF}'

OR

awk '/HOME/ {print $2}' data.txt | awk -F'/' '{print $NF}'

In this example, we are having a text file that is having several entries like:

---

c1 c2 c3 c4

this is some data

HOME /dir1/dir2/.../dirN/somefile1.xml

HOME /dir1/dir2/somefile2.xml

some more data

---

for lines starting with HOME, we are extracting the second field that is a 'file path with file name', and from that we need to get the filename only and ignore the slash delimited path.

The output would be:

somefile1.xml

somefile2.xml

(In case you give a -ive - pls give the reasons as well and enlighten the souls :-) )

cd !$
2009-05-08 09:48:14
Functions: cd
-3

During this operation :

# mv Joomla_1.5.10-Stable-Full_Package.zip /var/www/joomla/

I invoke /var/www/joomla/ as last command argument. To change in this directory I can use

# cd !$

So I go to

hob:/var/www/joomla#

gzip *
2010-03-29 10:58:40
User: funky
Functions: gzip
Tags: gzip
-3

Should do exactly the same - compress every file in the current directory. You can even use it recursively:

gzip -r .