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Get Interface's IP on Mac
This is sample output - yours may be different.
0

ipconfig getifaddr <Interface>

commandlinefu · 2009-08-10 15:04:44 3
Get the size of all the directories in current directory

OSX's BSD version of the du command uses the -d argument instead of --max-depth.
This is sample output - yours may be different.
3

du -hd 1

Tuirgin · 2009-08-10 13:11:22 3
back up your commandlinefu contributed commands

Use `zless` to read the content of your *rss.gz file: zless commandlinefu-contribs-backup-2009-08-10-07.40.39.rss.gz Show Sample Output
This is sample output - yours may be different.
```
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 20487    0 20487    0     0  18344      0 --:--:--  0:00:01 --:--:-- 97557
```
10

curl http://www.commandlinefu.com/commands/by/<your username>/rss|gzip ->commandlinefu-contribs-backup-$(date +%Y-%m-%d-%H.%M.%S).rss.gz

linuxrawkstar · 2009-08-10 12:43:33 38

Picture Renamer

jhead is a very nice tool to do all sorts of things with photographs, in a batch-oriented way. It has a specific function to rename files based on dates, and the format I used above was just an example. Show Sample Output

jhead -n%Y%m%d-%H%M%S *.jpg

sitaramcUnused · 2009-08-10 03:49:30 7

Picture Renamer

Renames all the jpg files as their timestamps with ".jpg" extension. Show Sample Output
This is sample output - yours may be different.
```
2008-09-26 20-59-03.jpg  2008-10-25 22-27-45.jpg  2008-12-19 22-07-51.jpg
2008-10-02 15-01-42.jpg  2008-10-25 22-28-02.jpg  2008-12-19 22-07-59.jpg
2008-10-02 15-25-34.jpg  2008-11-04 16-44-20.jpg  2008-12-19 22-09-54.jpg
```
0

ls -1 *.jpg | while read fn; do export pa=`exiv2 "$fn" | grep timestamp | awk '{ print $4 " " $5 ".jpg"}' | tr ":" "-"`; mv "$fn" "$pa"; done

axanc · 2009-08-10 00:52:22 3
Define an alias with a correct completion

In Bash, when defining an alias, one usually loses the completion related to the function used in that alias (that completion is usually defined in /etc/bash_completion using the complete builtin). It's easy to reuse the work done for that completion in order to have smart completion for our alias. That's what is done by this command line (that's only an example but it may be very easy to reuse). Note 1 : You can use given command line in a loop "for old in apt-get apt-cache" if you want to define aliases like that for many commands. Note 2 : You can put the output of the command directly in your .bashrc file (after the ". /etc/bash_completion") to always have the alias and its completion Show Sample Output
This is sample output - yours may be different.
```
# at the beginning
$ sudo apt-get in<tab> # gives "sudo apt-get install" (smart completion)
# then su-apt-get='sudo apt-get'
$ su-apt-get in<tab> # gives "su-apt-get in" (no completion)
# finally with given command
$ su-apt-get in<tab> # gives "su-apt-get install" (smart completion \o/)
```
4

old='apt-get'; new="su-${old}"; command="sudo ${old}"; alias "${new}=${command}"; $( complete | sed -n "s/${old}$/${new}/p" ); alias ${new}; complete -p ${new}

Josay · 2009-08-10 00:15:05 4
Convert every eps in a directory to pdf

Converts every *.eps file to a *.pdf file
This is sample output - yours may be different.
1

for f in *.eps;do ps2pdf -dEPSCrop $f `basename $f .eps`.pdf; done

rader5 · 2009-08-09 20:58:07 4
Replace Every occurrence of a word in a file

Replace 'this' with 'that'
This is sample output - yours may be different.
2

perl -p -i -e 's/this/that/g' filename

rader5 · 2009-08-09 20:53:50 8
currently mounted filesystems in nice layout

since fuse mounts do not appear in /etc/mtab (fuse can't write there, dunno if it would if it could) this is propably a better way.
This is sample output - yours may be different.
11

column -t /proc/mounts

unixmonkey5049 · 2009-08-09 17:00:41 6
Script para hacer un acopia d ela base de datos mysql

Tres lineas en un shell script para copiar la base de datos diaramente
This is sample output - yours may be different.
-2

FECHA=$(date +"%F") FINAL="$FECHA.sql.gz" mysqldump -h localhost -u user --password="pass" --opt jdiaz61_lupajuridica | gzip > /home/jdiaz61/www/backup/$FINAL

juancabo · 2009-08-09 14:51:46 5
Convert one file from ISO-8859-1 to UTF-8.

Nothing fancy it just converts one file from one character encoding into another one.
This is sample output - yours may be different.
3

iconv --from-code=ISO-8859-1 --to-code=UTF-8 iso.txt > utf.txt

jsiei97 · 2009-08-09 14:22:09 5
Remove newlines from output

Remove newlines from output. One character shorter than awk /./ filename and doesn't use a superfluous cat. To be fair though, I'm pretty sure fraktil was thinking being able to nuke newlines from any command is much more useful than just from one file.
This is sample output - yours may be different.
7

grep . filename

TheMightyBuzzard · 2009-08-09 05:33:58 12
Get your external IP address if your machine has a DNS entry

Easy way to see your real external IP Show Sample Output
This is sample output - yours may be different.
```
127.0.0.1
```
1

curl www.whatismyip.com/automation/n09230945.asp

dunka · 2009-08-09 04:08:41 3
Update program providing java on Debian

Lets you set all the java alternatives at once to a matching version. Also has options for just changing the jre or the plugin.
This is sample output - yours may be different.
2

update-java-alternatives

stuart · 2009-08-09 02:43:06 6
Stage only portions of the changes to a file.
This is sample output - yours may be different.
4

git add --patch <filename>

stuart · 2009-08-09 02:24:43 3
A fun thing to do with ram is actually open it up and take a peek. This command will show you all the string (plain text) values in ram

cat? dd? RTFM
This is sample output - yours may be different.
27

sudo strings /dev/mem

point_to_null · 2009-08-09 02:07:26 12
Get your external IP address if your machine has a DNS entry
This is sample output - yours may be different.
4

dig +short $HOSTNAME

stuart · 2009-08-09 02:05:38 5
Remove newlines from output

?Cat and grep? You can use only grep ("grep \. filename"). Better option is awk.
This is sample output - yours may be different.
1

awk /./ filename

point_to_null · 2009-08-09 02:04:46 4
Remove newlines from output

Pipe any output to "grep ." and blank lines will not be printed.
This is sample output - yours may be different.
3

cat filename | grep .

fraktil · 2009-08-09 01:00:59 4
A fun thing to do with ram is actually open it up and take a peek. This command will show you all the string (plain text) values in ram
This is sample output - yours may be different.
6

strings /dev/mem|less

fraktil · 2009-08-09 00:56:06 8
32 bits or 64 bits?

Easy and direct way to find this out. Show Sample Output
This is sample output - yours may be different.
```
32
```
124

getconf LONG_BIT

caiosba · 2009-08-08 21:22:19 61
Get your external IP address if your machine has a DNS entry

Using DynDNS or a similar service not only allows access to your home machine from outside without needing to know what IP the ISP has assigned to it but it also comes in handy if you want to know your external IP address. The only purpose of the sed command is to remove the leading "host.na.me has address " part from the output. If you don't need to discard it you can simply use host $HOSTNAME
This is sample output - yours may be different.
1

host $HOSTNAME|cut -d' ' -f4

penpen · 2009-08-08 12:39:00 5
get time in other timezones

On Ubuntu, if tzwatch is installed, then you can call up in terminal the output for every time zone configured in gWorldClock. Show Sample Output
This is sample output - yours may be different.
```
Fri Aug  7 18:23:49 PDT 2009   Local
Sat Aug  8 11:23:49 EST 2009   Australia/Sydney
Sat Aug  8 02:23:49 WEST 2009   Europe/Lisbon
Sat Aug  8 02:23:49 BST 2009   Europe/London
```
5

tzwatch

terry2wa · 2009-08-08 01:26:08 3
get time in other timezones

On Ubuntu, if tzwatch is installed, then you can call up in terminal the output for every time zone configured in gWorldClock. Show Sample Output
This is sample output - yours may be different.
```
Fri Aug  7 18:23:49 PDT 2009   Local
Sat Aug  8 11:23:49 EST 2009   Australia/Sydney
Sat Aug  8 02:23:49 WEST 2009   Europe/Lisbon
Sat Aug  8 02:23:49 BST 2009   Europe/London
```
0

tzwatch

terry2wa · 2009-08-08 01:25:50 4
Get the size of all the directories in current directory
This is sample output - yours may be different.
7

du --max-depth=1

Octave · 2009-08-08 00:46:29 17
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What's this?

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Split video files using avconv along keyframes

Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

Remove a range of lines from a file

Deletes lines to of a file. You must put the end line first in the range for the curly brace expansion, otherwise it will not work properly.

Monitor RAID IO Usage

Shows the IO of the raid sync

Validate date, also a date within a leap year

Important to know: a valid date will return 0, otherwise 1!

check open ports without netstat or lsof

Bare Metal IRC Client

Uses the extremely cool utilities netcat and expect. "expect" logs in & monitors for server PING checks. When a PING is received it sends the PONG needed to stay connected. IRC commands to try: HELP, TIME, MOTD, JOIN and PRIVMSG The "/" in front of IRC commands are not needed, e.g. type JOIN #mygroup Learn about expect: http://tldp.org/LDP/LGNET/issue48/fisher.html The sample output shows snippets from an actual IRC session. Please click UP button if you like it!

Save your open windows to a file so they can be opened after you restart

This will save your open windows to a file (~/.windows). To start those applications: $ cat ~/.windows | while read line; do $line &; done Should work on any EWMH/NetWM compatible X Window Manager. If you use DWM or another Window Manager not using EWMH or NetWM try this: $ xwininfo -root -children | grep '^ ' | grep -v children | grep -v '' | sed -n 's/^ *$0x[0-9a-f]*$ .*/\1/p' | uniq | while read line; do xprop -id $line _NET_WM_PID | sed -n 's/.* = $[0-9]*$$/\1/p'; done | uniq -u | grep -v '^$' | while read line; do ps -o cmd= $line; done > ~/.windows

grep certain file types recursively

doesn't do case-insensitive filenames like iname but otherwise likely to be faster

List files with full path

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