To filter an archived log:

Enable the CLI enable mode:

hostname > enable

List the logs:

hostname # show log files

To display only the lines in an archived log that match a regular expression:

hostname # show log files <number> matching <regular expression>

hostname # show log files <number> matching <regular expression>

where <number> is the number of the file in the list of log files.

To display only the lines in an archived log that do not match a regular expression:

hostname # show log files <number> not matching <regular expression>