From the NannyMUD documentation

LAST CHANGE

2000-12-08

COMMAND

NAME
        egrep - Search files for a regular expression.


LOCATION
	Wizmod, module 'default'.

SYNTAX
	egrep [-ilnvV]  

DESCRIPTION
	This command reads files, and shows lines in the file that matches
	the pattern given.

	Flags:
	-i	Case insensitive search (everything is made lower-case before
		matching is done).
	-l	Precede lines with filename.
	-n	Precede lines with line number. This option costs quite a lot
		of CPU on large files, so use with caution.
	-v	Show lines NOT matching the pattern.
	-V	Verbose, output some information about what goes on.


NOTE
	Many clients eat special characters like backslash.


NOTE
	Files larger than 1 Mb cannot be treated by this command.


NOTE
	When using expressions like "egrep foo *", a maximum of 30 files
	will be scanned. Doing this for many large files might cost a lot
	of CPU, so again, use with some caution.