Accidentally deleted system component via terminal

While playing around with Terminal, I accidentally deleted a file within the ~/.MacOSX/environment DYLD_INSERT_LIBRARIES folder.
Now my computer refuses to login, and shows a pinwheel when I try.
I tried to reinstall Lion (keeping my current profile). However, there was no effect.
Is there any way to fix this, or is my only recourse to try and wipe the computer and do a clean install?

Install or Reinstall Lion from Scratch
If possible backup your files to an external drive or second internal drive.
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Erase the hard drive:
Select Disk Utility from the main menu and click on the Continue button.
After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Erase tab in the DU main window.
Set the format type to Mac OS Extended (Journaled.) Click on the Erase button and wait until the process has completed.
Quit DU and return to the main menu.
Reinstall Lion: Select Reinstall Lion and click on the Install button.
Note: You can also re-download the Lion installer by opening the App Store application. Hold down the OPTION key and click on the Purchases icon in the toolbar. You should now see an active Install button to the right of your Lion purchase entry. There are situations in which this will not work. For example, if you are already booted into the Lion you originally purchased with your Apple ID or if an instance of the Lion installer is located anywhere on your computer.

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Hey SchenkerBob,
It is possible to disable non-system fonts temporarily for all applications using the Font Book application. This article explains how to do so -
Mac Basics: Font Book - Apple Support
In particular -
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Organize fonts as collections
When working with fonts, you may discover that you use certain fonts frequently, but rarely use others. To make it easier to find the font you are looking for, you can organize your fonts into collections.
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Thanks for using Apple Support Communities.
Happy computing,
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I'm trying to do a certain set up on my Nintendo 3ds system using wifi on my Mac OS X desktop and in order to do it I'm suppose to put in certain commands in the terminal, but I made a mistake and pressed backspace and accidentally deleted my commands in my terminal box. I'm new to using terminal and I have not emptied my trash. What can I do to get it back?

You typed something into the terminal and you have no idea where you got the original command from and you have no idea what you typed. Now the screen shot you post is pretty messed up. Not really sure what you expect especially if you wont answer the questions asked or try the steps suggested.
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Wish I had more
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find ~/ -maxdepth 1 -type d -iname '*google*drive*' 2> /dev/null -exec rm -Rf {} \;
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It is easier to start with the 2nd command.
'rm' is remove, as in delete. the files in ~ (your home folder) -> Library (a hidden file so people do not go messing in it) -> Applications Support -> Google ->Drive (which is where I assume some Google Drive information is typically stored.
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The -maxdepth 1 say says stop at the current folder. That is to say, do not look in any sub-folders. A value of 2 would look in just the sub-folders under the target folder. A value of 3 would go down another level, etc... So -maxdepth 1 just looked for file in your home folder.
The -type d said select folders (d for directory, aka a folder). So it ignored anything that was not a folder.
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greetings from austria

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Accidentally deleted system component via terminal

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