However, the following are changes that all users should note. Although all of your files from the old system have been moved to the new system, the compiled binary programs will not run until they have been recompiled. The default login shell for all users has been changed from csh to Bash. Bash is a sh-compatible command language interpreter that executes user commands. To read more about Bash read the Bash-FAQ .
Bash uses different set of login files than did csh.
Users who have modified their csh startup file .cshrc will have to make those modifications again in their Bash startup file .profile . Take special care in modifying your startup files especially the PATH variable to avoid rendering your account inaccessible. For users that would like to switch back to using csh can use the chsh command to make the modification. System Announcements, Command Removed - inform Local system announcements will no longer be made through the inform program but instead will be available via the web. The writeup command for displaying locally written documentation has been replaced by web pages.