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### admin examples

#### Outdating is dangerous

First, an example of how not to use the `admin` command. It is included to stress the fact that this command can be quite dangerous unless you know exactly what you are doing.

The ``-o'` option can be used to outdate old revisions from the history file. If you are short on disc this option might help you. But think twice before using it--there is no way short of restoring the latest backup to undo this command!

The next line is an example of a command that you would not like to execute.

    $ cvs admin -o:R_1_02 .

The above command will delete all revisions up to, and including, the revision that corresponds to the tag R_1_02. But beware! If there are files that have not changed between R_1_02 and R_1_03 the file will have the same numerical revision number assigned to the tags R_1_02 and R_1_03. So not only will it be impossible to retrieve R_1_02; R_1_03 will also have to be restored from the tapes!

#### Comment leaders

If you use the `$`Log$ keyword and you do not agree with the guess for comment leader that CVS has done, you can enforce your will with `cvs admin -c`. This might be suitable for `nroff` source:

    $ cvs admin -c'.\" ' *.man
    $ rm *.man
    $ cvs update

The two last steps are to make sure that you get the versions with correct comment leaders in your working files.

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