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mgrep is a command line tool that allows users to search text files for lines matching a given regular expression. It is similar to the well-known Unix utility, grep.
As a natural extension to the single-line regular expressions, mgrep is also capable of searching for multiline patterns.
mgrep is not a grep replacement, but it is intended to be grep-compatible: implemented options and behavior should be the same as those of grep.
mgrep is written in C++ using the Boost.Regex library...
Copies IP packets from source to destination PCAP files.
IPGREP is a command line tool to grep IP packets out of PCAP files. It provides basic filter for IP version and IP addresses. It is written in pure C without LIBPCAP, so it should run faster.
binreplace is a command line tool to search and replace binary sequences in a file. It can be very powerful when used together with grep and sed. It uses prefix tree internally to search. It's efficient even with millions of search terms.