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Hiding and Show files on Mac OS X

These commands will mark a file as hidden or visible to Mac OS X Finder. Notice the capitol V vs the lowercase v. This will also work for directories. setfile -a V foo.bar; // This marks the file invisible setfile -a v foo.bar; // This marks the file visible I have also found that adding the following aliases are helpful: alias hide='setfile -a V' alias show='setfile -a v'
This is sample output - yours may be different.
1

setfile -a V foo.bar; setfile -a v foo.bar;

JakeCarter · 2009-08-12 17:16:03 12
grep certain file types recursively
This is sample output - yours may be different.
4

find . -name "*.[ch]" | xargs grep "TODO"

freestyler · 2009-08-12 16:53:01 5
Generate random IP addresses

It never ends Show Sample Output
This is sample output - yours may be different.
```
136.159.200.131
188.52.81.164  
67.192.148.226 
192.136.218.176
93.242.113.87  
112.209.160.94 
(... ad infinitum ...)
```
1

nmap -n -iR 0 -sL | cut -d" " -f 2

kovan · 2009-08-12 16:49:55 8
use vim to get colorful diff output

:q to quit
This is sample output - yours may be different.
23

svn diff | view -

freestyler · 2009-08-12 16:41:31 17
List path of binaries

( IFS=:; for i in $PATH; do echo $i; done; ) echo $PATH|sed -e 's/:/\n/g' # but the tr one is even better of course echo $PATH|xargs -d: -i echo {} # but this comes up with an extra blank line; can't figure out why and don't have the time :( echo $PATH|cut -d: --output-delimiter=' ' -f1-99 # note -- you have to hit ENTER after the first QUOTE, then type the second one. Sneaky, huh? echo $PATH | perl -l -0x3a -pe 1 # same darn extra new line; again no time to investigate echo $PATH|perl -pe 's/:/\n/g' # too obvious; clearly I'm running out of ideas :-)
This is sample output - yours may be different.
-17

not necessarily better, but many...!

sitaramcUnused · 2009-08-12 11:03:26 4
Get a regular updated list of zombies

to omit "grep -v", put some brackets around a single character
This is sample output - yours may be different.
6

watch "ps auxw | grep [d]efunct"

alvinx · 2009-08-12 08:11:16 4
List path of binaries
This is sample output - yours may be different.
-2

echo $PATH|awk -F: ' { for (i=1; i <= NF; i++) print $i }'

nitins · 2009-08-12 07:56:56 4
Change Windows Domain password from Linux

If you use Linux in a Windows domain and there are N days to expiry, this is how you can change it without resorting to a windows machine.
This is sample output - yours may be different.
7

smbpasswd -r <domain-server> -U <user name>

greppo · 2009-08-12 07:46:48 11
Download file with multiple simultaneous connections

`aria2c` (from the aria2 project) allows. Change -s 4 to an arbitrary number of segments to control the number of concurrent connections. It is also possible to provide multiple URLs to the same content (potentially over multiple protocols) to download the file concurrently from multiple hosts.
This is sample output - yours may be different.
8

aria2c -s 4 http://my/url

jrk · 2009-08-11 22:34:00 11
Preview of a picture in a terminal

This command allows you to see a preview of a picture via the terminal. It can be usefull when you are ssh'ing your server without X-forwarding. To have en example of the output you can get with this command see http://www.vimeo.com/3721117 Download at http://inouire.net/image-couleur.html Sources here: http://inouire.net/archives/image-couleur_source.tar.gz
This is sample output - yours may be different.
2

img test.jpg

Inouire · 2009-08-11 22:09:21 10
Get info on RAM Slots and Max RAM.
This is sample output - yours may be different.
2

dmidecode 2.9 | grep "Maximum Capacity"; dmidecode -t 17 | grep Size

lunarblu · 2009-08-11 21:23:29 4
On Mac OS X, runs System Profiler Report and e-mails it to specified address.

Replace "user@domain.com" with the target e-mail address. Thanks to alediaz for "$HOSTNAME" which is very useful when running the command with Apple Remote Desktop to multiple machines simultaneously.
This is sample output - yours may be different.
4

system_profiler | mail -s "$HOSTNAME System Profiler Report" user@domain.com

monkeymac · 2009-08-11 20:16:37 7
Move all but the newest 100 emails to a gzipped archive
This is sample output - yours may be different.
3

find $MAILDIR/ -type f -printf '%T@ %p\n' | sort --reverse | sed -e '{ 1,100d; s/[0-9]*\.[0-9]* $.*$/\1/g }' | xargs -i sh -c "cat {}&&rm -f {}" | gzip -c >>ARCHIVE.gz

maergil · 2009-08-11 20:12:15 3
ps -A

list all the processes Show Sample Output
This is sample output - yours may be different.
```
list all the process
```
-13

ps -A

xraj · 2009-08-11 16:52:59 7
Sum columns from CSV column $COL

More of the same but with more elaborate perl-fu :-)
This is sample output - yours may be different.
1

perl -F',' -ane '$a += $F[3]; END { print $a }' test.csv

coffeeaddict_nl · 2009-08-11 15:08:58 3
Testing php configuration
This is sample output - yours may be different.
6

php -i

elzapp · 2009-08-11 14:17:13 27
Testing php configuration
This is sample output - yours may be different.
1

php -r "phpinfo;"

s0x · 2009-08-11 13:39:16 4
Check if a domain is available and get the answer in just one line

Returns nothing if the domain exists and 'No match for domain.com' otherwise.
This is sample output - yours may be different.
7

whois domainnametocheck.com | grep match

Timothee · 2009-08-11 13:33:25 17
Get a regular updated list of zombies

Shows all those processes; useful when building some massively forking script that could lead to zombies when you don't have your waitpid()'s done just right.
This is sample output - yours may be different.
5

watch "ps auxw | grep 'defunct' | grep -v 'grep' | grep -v 'watch'"

coffeeaddict_nl · 2009-08-11 12:22:13 4
Sum columns from CSV column $COL
This is sample output - yours may be different.
8

awk -F ',' '{ x = x + $4 } END { print x }' test.csv

coffeeaddict_nl · 2009-08-11 12:10:33 11
Testing php configuration

Run the function phpinfo() on the shell
This is sample output - yours may be different.
2

php -r phpinfo();

amaymon · 2009-08-11 07:00:51 4
Testing php configuration

http://localhost/test.php
This is sample output - yours may be different.
-3

echo "<?php phpinfo(); ?>" >> /srv/www/htdocs/test.php

userevolution · 2009-08-11 05:56:25 13
Picture Renamer
This is sample output - yours may be different.
1

exiv2 rename *.jpg

unixmonkey5069 · 2009-08-10 22:11:19 17
Recursively Find Images, Convert to JPEGS and Delete

Simple command to convert a large number of images into jpeg-format. Will delete originals after conversion.
This is sample output - yours may be different.
4

find . -name '*'.tiff -exec bash -c "mogrify -format jpg -quality 85 -resize 75% {} && rm {}" \;

erlebnishengst · 2009-08-10 18:27:10 6
Count the number of pages of all PDFs in current directory and all subdirs, recursively
This is sample output - yours may be different.
3

find . -name \*.pdf -exec pdfinfo {} \; | grep Pages | sed -e "s/Pages:\s*//g" | awk '{ sum += $1;} END { print sum; }'

unixmonkey3987 · 2009-08-10 16:28:24 45
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DELETE all those duplicate files but one based on md5 hash comparision in the current directory tree

This one-liner will the *delete* without any further confirmation all 100% duplicates but one based on their md5 hash in the current directory tree (i.e including files in its subdirectories). Good for cleaning up collections of mp3 files or pictures of your dog|cat|kids|wife being present in gazillion incarnations on hd. md5sum can be substituted with sha1sum without problems. The actual filename is not taken into account-just the hash is used. Whatever sort thinks is the first filename is kept. It is assumed that the filename does not contain 0x00. As per the good suggestion in the first comment, this one does a hard link instead: $ find . -xdev -type f -print0 | xargs -0 md5sum | sort | perl -ne 'chomp; $ph=$h; ($h,$f)=split(/\s+/,$_,2); if ($h ne $ph) { $k = $f; } else { unlink($f); link($k, $f); }'

Create a bunch of dummy text files

Check wireless link quality with dialog box

The variable WIRELESSINTERFACE indicates your wireless interface

histogram of file size

faster version of ls *

I know its not much but is very useful in time consuming scripts (cron, rc.d, etc).

get you public ip address

Relies on ifconfig.me functioning. It's about as easy as it gets, and memorable to old geeks too.

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

grep processes list avoiding the grep itself

Trick to avoid the form: grep process | grep - v grep

Combining text files into one file

Download Youtube video with wget!

Nothing special required, just wget, sed & tr!

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