To avoid always having to include standard command-line switches for common operations, the default options can be put in a ~/.cvsrc file. Here is an example:
update -dP diff -cThis means that the command
$ cvs updatewill be executed as though it had been typed thus:
$ cvs update -dPTo turn off these default settings for a particular occasion, use
$ cvs -f ...to ignore the ~/.cvsrc file.