Undo a terminal command

hello, I need help asap! I performed these two commands on my macs with hopes of speeding loading youtube videos. but this made the other videos that I watch online, not on youtube, load extremely slow.
sudo ipfw add reject src-ip 173.194.55.0/24 in
sudo ipfw add reject src-ip 206.111.0.0/16 in
Please help me undo this since its making the other videos load so slowly.
thank you!!
this is the link where i got the tutorial:
http://http://mitchribar.com/2013/02/time-warner-cable-*****-for-youtube-twitcht v/

see if the following post helps you - http://totalbantercommunity.com/viewtopic.php?f=46&t=1593
my computer shows (based on the list command)
12345 allow ip from any to any

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How can I undo a terminal command?

I have altered the default location of screenshots taken on my iMac. Origionally the screenshots were sent to my desktop.
I created a folder and named it screenshots. I then opened a terminal screen which was found in the finder, under utilities. Then I copied the following into the command line "defaults write com.apple.screencapture location". Then before clicking return, I dragged the folder I named "screenshots" into the terminal window. Then I typed "killall SystemUIServer" to reset the terminal and the changes took effect.
I am curious now, how to undo these changes if I want to?

I don't believe you are using a PPC iMac, so you may want to change your profile configuration to include all the information about your hardware.
A good utility for doing these types of configurations without the need to know Terminal commands is MacPilot 4.3.1.

Undoing a terminal command

I mistakenly did the wrong command in terminal it was:
defaults write com.apple.dock persistent-apps -array-add-multiple
everything that was in my dock is now gone except the applications that are running
does anyone know how to undo this?

I figured it out i did
cd ~/Library/Preferences
rm ~/Library/Preferences/com.apple.dock.plisteng262:Preferences michaelbreiner$ killall Dock

How do I Undo This Terminal Command?

defaults write com.apple.Safari NSQuitAlwaysKeepsWindows -int 0
thats the exact termial command i used. Any help would be great! Ive Tried using different commands to counteract this one but i have no idea what im doing.
- Im running lion
- i got the brand new macbook pro
- any help would be awesome!

Obligatory warning: If you mess around with the shell without knowing what you're doing, you will cause yourself big trouble. You were lucky this time. Many shell commands can't be reversed so easily, if at all.

Can I undo iChat Terminal command?

Entered "com.apple.ichat newbwdup 300000" on an iBook running 10.3.9 not realizing that that was only for Panther. Now it cannot connect to the internet or open iChat. Is there anything that can be done other than reinstall?

Run the following command:
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Help, i made a terminal command and i don't know how to undo it.

i found my long lost folder of terminal commands.. and i forgot what this one did, so i clicked it (i made the commands into a "unix executable file").. and all my files on my desktop are now hidden.. the only way to find them is to type in the file name into finder.
the command i typed in was
while (true) do
chflags hidden ~/Desktop/*
done
and now everything on my desktop is gone, and i dont know how to undo it, I undid once about 3 months ago when i wrote it, but i forgot what i did. I tried counterering the command with others but it isn't doing anything. thank you
edit: i know this command cant destroy my system because it wasn't a sudo, but still, i had all my class work on my laptop and now it's all invisible

Hi, try this...
while (true) do
chflags nohidden ~/Desktop/*
done

Undo terminal command

I recently followed these instructions to stop iTunes from automatically downloading tv shows every time I opened it:
With iTunes open select iTunes > Preferences... and click the Store tab
If checked, uncheck checkbox Always check for available downloads
If checked, uncheck checkbox Download pre-orders when available
Click the OK button, and close iTunes
Open Applications > Utilities > Terminal.app
Type cd ~/Music/iTunes/iTunes\ Media/Downloads then press <Enter>
Type rm -rf * to delete the plist file along with all of the downloads of TV shows
Re-open iTunes. There shouldn't be TV shows automatically downloading any longer when you open iTunes. Breath. Relax. Rejoice.
The result was, on restarting the computer, that all my documents, iPhoto library, iTunes library, and Mail folders were gone. I realize now that I'm not expert enough be running Terminal commands. My question is: is there any way to undo this damage?

If you don't have a backup of them, try using a data recovery product such as the ones listed here. Don't write anything else to the drive until the files are recovered or you choose not to recover them.
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Is there a terminal command to disable the "Boing' sound ?

Hello, Everyone
I was wondering if any one knows if there is a terminal command that can
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A couple of people have looked in the System preferences,usual areas but
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 Power PC G4 (3.3) ♥ iMac Flat Panel 10.3.9 ] 15 Alum.PowerBook Tiger Mac OS X (10.4.6) AEBS & iMac Intel Core Duo 2gb
Message was edited by: Eme~

Mine doesn't make a sound when I do this.
I presume you have unchecked the "Play user interfacesound effects" > in System Preferences> Sound. The other OP wants to disable only the infamous boing. I found both the files you wrote of. Thank you very much !
I just needed to summarize this & then undoing if so desired.
Bill, please what would the command be for undoing this action ?
Launch Terminal and type this: sudo gzip
enter ~~
password prompt,
then this : /System/Library/PrivateFrameworks/ScreenReader.framework/Versions/A/Resources/S ounds/SpringForward.aiff
Is this correct ?
Thanks so very, very much for your expertise, patience and sharing it with me.~ Eme
 Power PC G4 (3.3) ♥ iMac Flat Panel 10.3.9 ] 15 Alum.PowerBook Tiger Mac OS X (10.4.6) AEBS & iMac Intel Core Duo 2gb

Undo Message Delete command is sometimes present, sometimes not

I've noticed that sometimes the Undo Message Delete command is present after I delete a message
but other times it isn't - all that's there is Undo which is greyed out. Does anyone know the conditions
under which the Undo Message Delete command appears? I haven't found any consistent pattern.
I know the message can be manually moved back from the Trash but I've found that occasionally I've inadvertently
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Open your firewall program. First check the settings. Make sure that the
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go to the list of programs the firewall has. Make sure that all the programs
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====================================
'''Try Firefox Safe Mode''' to see if the problem goes away. [[Troubleshoot Firefox issues using Safe Mode|Firefox Safe Mode]] is a troubleshooting mode that turns off some settings and disables most add-ons (extensions and themes).
''(If you're using an added theme, switch to the Default theme.)''
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[[Image:FirefoxSafeMode|width=520]]<br><br>
If Firefox is not running, you can start Firefox in Safe Mode as follows:
* On Windows: Hold the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* On Mac: Hold the '''option''' key while starting Firefox.
* On Linux: Quit Firefox, go to your Terminal and run ''firefox -safe-mode'' <br>(you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
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[[Image:Safe Mode Fx 15 - Win]]
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''To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.''
When you figure out what's causing your issues, please let us know. It might help others with the same problem.
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I screwed up while trying to make my library folder visible and typed the following command in Terminal: chflags ~/Library
Is this going to cause problems and if so, is there a way to delete it? I also added the correct Terminal command and the Library folder is now visible.
Thanks much!

That is correct, after typing: 'chflags ~/Library' and hitting "Enter", I typed: 'chflags nohidden ~/Library' and "Enter" Thanks much for your reply! No way to undo what I did?

Done Something Dumb, Please Help With Terminal Command

OK, So I couldn't figure out why I was no longer getting Growl notifications with mail.app and GrowlMail after I upgraded to 10.5. Turns out it has something to do with the bundle version it is running. I ran the following 2 terminal commands found here : http://www.davidroessli.com/logs/2007/01/gettinggrowlmail_towork/
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defaults write com.apple.mail EnableBundles 1
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Please help the newbie and tell me please how to undo the following terminal command:
sudo ln -s /System/Library/Filesystems/fusefs.fs/mount_fusefs /usr/bin/mount_fusefs
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+sudo rm /usr/bin/mount_fusefs+
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How can I change the "Ask to join new networks" option using a terminal command?

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Undo a terminal command

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