All commands

All commands (14,187)

sorted by

List your largest installed packages (on Debian/Ubuntu)

dpigs is in the package debian-goodies (debian/ubuntu)
This is sample output - yours may be different.
11

dpigs

xrm0 · 2009-10-26 20:38:17 18
Calculating series with awk: add numbers from 1 to 100

Calculating series with awk only, no need for seq: add numbers from 1 to 100 Variations: 1+3+...+(2n-1) = n^2 awk 'BEGIN {for(i=1;i<=19;i+=2)sum+=i}; END {print sum}' /dev/null # displays 100 1/2 + 1/4 + ... = 1 awk 'BEGIN {for(i=1;i<=10;i++)sum+=1/(2**i)}; END {print sum}' /dev/null # displays 0.999023 Show Sample Output
This is sample output - yours may be different.
```
5050
```
0

awk 'BEGIN {for(i=1;i<=100;i++)sum+=i}; END {print sum}' /dev/null

dennisw · 2009-10-26 18:24:57 3
Get ssh server fingerprints

Get your server's fingerprints to give to users to verify when they ssh in. Publickey locations may vary by distro. Fingerprints should be provided out-of-band. Show Sample Output
This is sample output - yours may be different.
```
2048 b6:de:15:9b:00:c1:f5:f8:68:g9:43:9b:94:81:c5:c9 /etc/ssh/ssh_host_rsa_key.pub (RSA)
1024 e5:60:ff:6a:1f:0f:01:d0:14:6b:89:fa:64:f3:ae:2a /etc/ssh/ssh_host_dsa_key.pub (DSA)
```
4

ssh-keygen -l -f /etc/ssh/ssh_host_rsa_key.pub && ssh-keygen -l -f /etc/ssh/ssh_host_dsa_key.pub

Mikelifeguard · 2009-10-26 17:52:41 4
What is my ip?
This is sample output - yours may be different.
10

curl http://www.whatismyip.org/

timothybeeler · 2009-10-26 17:40:56 9
Remove CR LF from a text file

conversely, you can type flip -m to convert the file back to MS line endings.
This is sample output - yours may be different.
0

flip -u $FILE

linuxrawkstar · 2009-10-26 17:33:26 4
Remove CR LF from a text file

Remove CR LF (CRLF) from a text file. use man:tr to get more info about removing other characters from a file. and even character to character replacements.
This is sample output - yours may be different.
3

tr -d '\r\n' < input_file.txt > output_file.txt

nadavkav · 2009-10-26 16:12:21 6
What is my ip?
This is sample output - yours may be different.
8

curl -s checkip.dyndns.org | grep -Eo '[0-9\.]+'

hugin · 2009-10-26 09:15:31 3
get ^DJI
This is sample output - yours may be different.
-1

getdji (){local url sedcmd;url='http://finance.yahoo.com/q?d=t&s=^DJI';sedcmd='/(DJI:.*)/,/Day.*/!d;s/^ *//g;';sedcmd="$sedcmd/Change:/s/Down / -/;/Change:/s/Up / +/;";sedcmd="$sedcmd/Open:/s//& /";lynx -dump "$url" | sed "$sedcmd"; }

twfcc · 2009-10-26 09:00:18 5
What is my ip?

See more details at http://blog.amit-agarwal.co.in/2008/12/01/get-you-ip-address-like-whatismyipcom/ Show Sample Output
This is sample output - yours may be different.
```
122.167.6.97
```
-2

w3m http://amit-agarwal.co.in/mystuff/getip_txt.php will return the ip in text format.

raj77_in · 2009-10-26 02:24:46 4
What is my ip?

See external ip with w3m, simple and fast. On a web site from Chile (spanish).
This is sample output - yours may be different.
-2

w3m miip.cl | grep ip

Cont3mpo · 2009-10-26 01:40:37 4
What is my ip?
This is sample output - yours may be different.
-2

lynx --dump "http://checkip.dyndns.org"

lmascarenhas · 2009-10-26 01:26:33 3
Mount an external FAT32 USB HDD
This is sample output - yours may be different.
-3

sudo mount -t vfat /dev/sdb1 /mnt/sdb1

steffoz · 2009-10-25 19:56:06 4
Prints per-line contribution per author for a GIT repository

You'll run into trouble if you have files w/ missing newlines at the end. I tried to use PAGER='sed \$q' git blame and even PAGER='sed \$q' git -p blame to force a newline at the end, but as soon as the output is redirected, git seems to ignore the pager.
This is sample output - yours may be different.
-1

git ls-files | while read i; do git blame $i | sed -e 's/^[^(]*(//' -e 's/^$[^[:digit:]]*$[[:space:]]\+[[:digit:]].*/\1/'; done | sort | uniq -ic | sort -nr

pipping · 2009-10-25 09:40:01 4
grep -v with multiple patterns.

That's what the sed command should've been, sorry.
This is sample output - yours may be different.
2

sed -n '/test/{/error\|critical\|warning/d;p}' somefile

pipping · 2009-10-25 09:07:00 3
List installed deb packages by size
This is sample output - yours may be different.
25

dpkg-query -Wf '${Installed-Size}\t${Package}\n' | sort -n

raspi · 2009-10-25 03:23:51 15
Prints per-line contribution per author for a GIT repository

Figures out total line contribution per author for an entire GIT repo. Includes binary files, which kind of mess up the true count. If crashes or takes too long, mess with the ls-file option at the start: git ls-files -x "*pdf" -x "*psd" -x "*tif" to remove really random binary files git ls-files "*.py" "*.html" "*.css" to only include specific file types Based off my original SVN version: http://www.commandlinefu.com/commands/view/2787/prints-total-line-count-contribution-per-user-for-an-svn-repository Show Sample Output
This is sample output - yours may be different.
```
 217167 askedrelic
  11592 bob
   3975 alice
   1276 jim
    358 tom
     64 brad
     13 Not Committed Yet
```
4

git ls-files | xargs -n1 -d'\n' -i git-blame {} | perl -n -e '/\s\((.*?)\s[0-9]{4}/ && print "$1\n"' | sort -f | uniq -c -w3 | sort -r

askedrelic · 2009-10-25 01:44:03 11
Forward connections

Forward connections to $HOSTNAME:8080 out to $HOST:80
This is sample output - yours may be different.
-2

ssh -g -L 8080:localhost:80 root@$HOST

kayowas · 2009-10-24 20:56:00 3
Monitor bandwidth by pid

Nethogs is a useful tool for monitor bandwidth consumption by pid. Tested on Debian an CentOs
This is sample output - yours may be different.
23

nethogs -p eth0

servermanaged · 2009-10-24 19:43:31 7
Convert Windows/DOS Text Files to Unix

Convert Windows/DOS Text Files to Uni Show Sample Output
This is sample output - yours may be different.
```
Convert Windows/DOS Text Files to Uni
```
-26

Convert Windows/DOS Text Files to Uni

nevzat · 2009-10-24 18:41:35 9
Display a block of text with AWK
This is sample output - yours may be different.
7

sed -n /start_pattern/,/stop_pattern/p file.txt

pipping · 2009-10-24 16:35:39 8
List bash functions defined in .bash_profile or .bashrc
This is sample output - yours may be different.
0

declare -F | sed 's/^declare -f //'

pipping · 2009-10-24 16:06:43 5
grep -v with multiple patterns.

If you wanted to do all in one command, you could go w/ sed instead
This is sample output - yours may be different.
3

sed '/test/{/error\|critical\|warning/d}' somefile

pipping · 2009-10-24 15:59:59 3
grep -v with multiple patterns.

You can use -e to pass multiple patterns.
This is sample output - yours may be different.
2

grep test somefile | grep -v -e error -e critical -e warning

pipping · 2009-10-24 15:58:11 3
Password Generation

Produces secure passwords that satisfy most rules for secure passwords and can be customized for correct output as needed. See "man pwgen" for details. Show Sample Output
This is sample output - yours may be different.
```
$ pwgen --alt-phonics --capitalize 9 10
ju7wuQu0w tahPh2hee Ooth7ag1O ieF8thai9 aeNg6thai rahLoy8ah ixeiz6Eiy OhN8Pheiz
IeHe3goi5 eeZ6ied7m 
```
8

pwgen --alt-phonics --capitalize 9 10

CafeNinja · 2009-10-24 08:36:36 40
password generator

make password randomly, default 8 chars, using bash3.X only, no external program.
This is sample output - yours may be different.
1

genpass(){local i x y z h;h=${1:-8};x=({a..z} {A..Z} {0..9});for ((i=0;i<$h;i++));do y=${x[$((RANDOM%${#x[@]}))]};z=$z$y;done;echo $z ;}

twfcc · 2009-10-24 04:32:31 13
‹ First < 433 434 435 436 437 > Last ›

What's this?

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

Share Your Commands

Check These Out

Convert seconds to [DD:][HH:]MM:SS

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" }

Choose from a nice graphical menu which DI.FM radio station to play

This is a very simple and lightweight way to play DI.FM stations For a more complete version of the command with proper strings in the menu, try: (couldnt fit in the command field above) $zenity --list --width 500 --height 500 --title 'DI.FM' --text 'Pick a Radio' --column 'radio' --column 'url' --print-column 2 $(curl -s http://www.di.fm/ | awk -F '"' '/href="http:.*\.pls.*96k/ {print $2}' | sort | awk -F '/|\.' '{print $(NF-1) " " $0}') | xargs mplayer This command line parses the html returned from http://di.fm and display all radio stations in a nice graphical menu. After the radio is chosen, the url is passed to mplayer so the music can start dependencies: - x11 with gtk environment - zenity: simple app for displaying gtk menus (sudo apt-get install zenity on ubuntu) - mplayer: simple audio player (sudo apt-get install mplayer on ubuntu)

list only directories in reverse order

Save the list of all available commands in your box to a file

When you press TAB twice in your prompt, bash tells you something like "Display all 4567 possibilities? (y or n)" But when you press "y" you only get the list in the terminal output and, if you want to save it to a file, you have to copy it by hand from the vterm screen. With this utility you save the list to a file or pipe it to another command at will You can use the file saved list to grep for a particular pattern, useful if you are searching for a command but you only remember a few letters

Find usb device

I often use it to find recently added ou removed device, or using find in /dev, or anything similar. Just run the command, plug the device, and wait to see him and only him

Concatenates lines using sed

list files recursively by size

Clear your history saved into .bash_history file!

clears the history

Find status of all symlinks

The symlinks command can show status of all symbolic links, including which links are dangling, which symlinks point to files on other file systems, which symlinks use ../ more than necessary, which symlinks are messy (e.g. having too many slashes or dots), etc. Other useful things it can do include removing all dangling links (-d) and converting absolute links to relative links (-c). The path given must be an absolute path (which is why I used $(pwd) in the example command).

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)

All commands (14,187) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

All commands (14,187)

sorted by