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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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Search previous commands from your .bash_history

This is not actually a command, it's just a keyboard shortchut. But a very useful one.

list files recursively by size

Big (four-byte) $RANDOM

Sometimes, in a shell script, you need a random number bigger than the range of $RANDOM. This will print a random number made of four hex values extracted from /dev/urandom.

analyze traffic remotely over ssh w/ wireshark

commandline for mac os x

diff the same file in two directories.

This is useful when you're diffing two files of the same name in radically different directory trees. For example: Set $ path1='/some/long/convoluted/path/to/all/of/your/source/from/a/long/dead/machine' then $ path2='/local/version/of/same/file' then run the command. Much easier on the eyes when you're looking back across your command history, especially if you're doing the same diff over and over again.

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

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

Counts number of lines (in source code excluding comments)

I took java to make the find command simpler and to state that it works for any language supported by cpp. cpp is the C/C++ preprocessor (interprets macros, removes comments, inserts includes, resolves trigraphs). The -fpreprocessor option tells cpp to assume the input has already been preprocessed so it will only replace comment lines with blank lines. The -L 1 option tells xargs to launch one process for each line, indeed cpp can only process one file at the time...

NSA codename generator

nsacodenamegenerator dot com is no more outputs random two words together in capital letters

Define a quick calculator function

defines a handy function for quick calculations from cli. once defined: $ ? 10*2+3

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