Tracking versions with SCCS

Recording changes with delta

Next, use the delta command as follows:

   $ delta s.lang

delta then prompts with

   comments?

Your response should be an explanation of why the changes were made. For example,

   added more languages

delta now reads the file p.lang and determines what changes you made to lang. It does this by doing its own get to retrieve the original version and applying the diff(1) command to the original version and the edited version. Next, delta stores the changes in s.lang and destroys the no longer needed p.lang and lang files.

When this process is complete, delta outputs

1.2
2 inserted
0 deleted
5 unchanged

The number 1.2 is the SID of the delta you just created, and the next three lines summarize what was done to s.lang.