Terminal/bash one liners

unknown

Sage

Posts: 1,403
Joined: 2005.07

Post: #1

Apr 11, 2007 — 12:32 AM

Ok heres some so you know what im talking about:

Code:

# run this and then open the file system_graphics.html

sudo find /System -name "*.png" | sed -e 's/\(.*\)/<img src="file:\/\/\1"><\/img>/' > system_graphics.html && open system_graphics.html

Code:

# convert all the pngs in the folder to jpegs

for i in *png ; do sips -s format jpeg "$i" -o "`echo $i | sed -e 's/\(.*\)png/\1jpg/' | sed -e 's/\(.*\)/\1/'`" ; done

Code:

# open whats on the dock

defaults read com.apple.dock | sed -n -e 's/.*"_CFURLString" = "\(.*\)\/.*/open \"\1\"/p' | sh

OK, so what one liners do you know?

Sir, e^iÏ€ + 1 = 0, hence God exists; reply!

OneSadCookie

Luminary

Posts: 5,125
Joined: 2002.04

Post: #2

Apr 11, 2007 — 02:06 AM

The standard one:

Code:

.(){ .|.&};.

milkfilk

Apprentice

Posts: 6
Joined: 2006.03

Post: #3

Apr 11, 2007 — 09:31 AM

OSD gives us a fork bomb. Eesh. I wonder if that actually does anything, I don't really have the brain-space to maintain which Linux/BSD/etc default installs allow the right ulimits (or whatever) that let the fork bomb work. I'll google it later.

Just don't run that or you'll be a sad cookie too!

Top 10 directories in size (GNU)

Code:

du -sc /|sort -rg|grep -v total|head -n 10

Don't have a mac to test it with.

Top 10 directories in size (Solaris)

Code:

du /* | sort -rn | head -n 10

Doing something until it works:

Code:

CD=1; while [ ! $CD -eq 0 ] ; do cd /tmp/fake; CD=$?; sleep 5; done

Then in another terminal, do `md /tmp/fake'. Loop exits. I used it for a shell tool that would update itself in a connectionless way, ie: it would time-out or bomb and I'd run the command again until it completed successfully.

I'd suggest something along the lines of development but if you wanted to build constantly (continuous integration) then cruisecontrol or what-not is obviously better than a stupid shell script loop.

kelvin

Member

Posts: 469
Joined: 2002.10

Post: #4

Apr 12, 2007 — 12:50 PM

Can't think of anything too nifty off the top of my head...
I think this is useful though:

mirror/backup my itunes library to my iMac from my MacbookPro

Code:

rsync -av Music kelvin@tantrum.local:/Users/kelvin

works with Pictures too for my iPhoto lib.

---Kelvin--
15.4" MacBook Pro revA
1.83GHz/2GB/250GB

Duane

Member

Posts: 567
Joined: 2004.07

Post: #5

Apr 12, 2007 — 05:15 PM

hm, did someone delete my post?
either that, or I was more tired that I thought....

It's not magic, it's Ruby.

igame3d

Member

Posts: 715
Joined: 2003.04

Post: #6

Apr 12, 2007 — 05:52 PM

Nayr Wrote:hm, did someone delete my post?
either that, or I was more tired that I thought....

Hmm I received a notification in email of an update to a different thread,
but when I arrived the post in my email did not exist on the forum, bugs?

iGame3D

Shunter

Member

Posts: 78
Joined: 2004.06

Post: #7

Apr 12, 2007 — 06:25 PM

My favorite:

Code:

exit

When in doubt ... read the Read Me
10.5.6 | MacBook Pro 2.5x2 | 4 GB RAM | GeForce 8600M GT

unknown

Sage

Posts: 1,403
Joined: 2005.07

Post: #8

Apr 12, 2007 — 06:26 PM

Nayr Wrote:hm, did someone delete my post?
either that, or I was more tired that I thought....

repost if you had somthing interesting

Sir, e^iÏ€ + 1 = 0, hence God exists; reply!

Duane

Member

Posts: 567
Joined: 2004.07

Post: #9

Apr 12, 2007 — 06:36 PM

ok, here it is: a quick line of bash I stole from a screensaver for a super-fast BRUTAL logout:

Code:

kill -15 `ps ax | grep -i loginwindow | grep -v grep | cut -c 1-6`

[edit1]oh yea, on debian gnu/*: apt-get moo[/edit1]

It's not magic, it's Ruby.

Joseph Duchesne

Unregistered

Post: #10

Apr 13, 2007 — 11:58 AM

Can't remember where I got this, but it's not mine:

/System/Library/Frameworks/ScreenSaver.framework/Resources/ScreenSaverEngine.app/Contents/MacOS/ScreenSaverEngine -background &

This runs the screensaver as a desktop image. Looks really cool with this screensaver
(note: remove the & if you don't want this to run in the background)
(note2: kill it by actually turning on the screensaver)

I wrote a little control panel hinging on this and:
defaults -currentHost write com.apple.screensaver modulePath \"%s\"
defaults -currentHost read com.apple.screensaver modulePath
but I never bothered putting online because there are a bunch of free control panels that do just this but better (sleep doesn't kill it).

unknown

Sage

Posts: 1,403
Joined: 2005.07

Post: #11

Apr 19, 2007 — 01:48 AM

Set the terminal to green text on on black backround & enter the matrix

Code:

while true ; do dd if=/dev/urandom bs=1200 count=1 2>/dev/null | md5 ; done | sed`echo '0ãƒ°1æ±2äº¬3ã‚¹4ã‚¹5ã‚ª6ãƒ©7ã‚«8ã‚¹9ã‚±aãƒˆbãƒ€cã‚¬dã’µeã‚¸fãƒ¤' | sed -e 's/\(.\)\(...\)/ -e s\/\1\/\2\/g/g'`

edit: It can be written a lot shorter than I had it before

Sir, e^iÏ€ + 1 = 0, hence God exists; reply!

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