Lab in advanced VLSI design

Cannot start Firefox

It may sometimes happen on Linux that Firefox refuses to run because it is already running. The cause is the existence of lock files that have not been properly removed when the previous Firefox session finished. It is possible to manually remove the locks as follows:

1. cd $HOME/.mozilla/firefox ($HOME is your home directory) You must have there a subdirectory whose name has the suffix .default (e.g., 6dfr8klx.default; the name has 8 characters).
   
2. cd xxxxxxxx.default
   
3. Remove the symbolic link lock and the file .parentlock:
   rm lock .parentlock
   

Then you should be able to run Firefox again.

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Cadence Virtuoso cell view locked

When your Linux session crashes for some reason while you were working on Cadence, or when you quit Cadence improperly (by clicking on the X icon on the top right of the command interpreter window (CIW) instead of using File -> Exit from the CIW main menu), some cell views (e.g., schematic or layout views) in the Cadence design library in use may stay locked, so any further attempt to use the views, even after a logout-login, is no more possible (you get an error saying that the view is already in use).

> cds clsAdminTool
> ale yourlib
This command will list the lockfiles in the lib called “yourlib” (update it accordingly)
> are yourlib
This command will remove the lockfiles in the lib called “yourlib” (update it accordingly)