Do previously installed UNIX commands retain themselves in Lion?

Question

If I update to Lion, will my user defined UNIX commands that I keep in /usr/local/bin/ still be there, or do I have to do a complete system overhaul to put them back?  (due to multiple dependencies and builds)

Answer 1

Please take each of the following steps that you haven't already tried until the problem is resolved.
Step 1
Follow the directions in this support article.
Step 2
Associate your Apple ID with your user account. Then sign in to the App Store with the same ID.
Step 3
Triple-click anywhere in the line below on this page to select it:
/Library/Caches/com.apple.appstore/adoption.plist
Right-click or control-click the line and select
Services ▹ Reveal
from the contextual menu.* A folder may open with a file named "adoption.plist" selected. If it does, move the file to the Trash. You may be prompted for your administrator password. Log out, log back in, and test.
*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combinationcommand-C. In the Finder, select
Go ▹ Go to Folder...
from the menu bar, paste into the box that opens (command-V). You won't see what you pasted because a line break is included. Press return.
Step 4
Contact Mac App Store Customer Service.