ngrep strives to provide most of GNU grep's common features,applying them to the network layer. ngrep is a pcap-aware tool that will allow you to specify extended regular expressions to match against data payloads of packets.
SUPPORT/REPORTING BUGS: please use https://github.com/jpr5/ngrep/issues Thank you!
Finddupe is a VERY FAST command line C program to catalog very large archives, identifying duplicate files even when offline. It has many features. You can easily grep a catalog to find what you have, and locate where it is.
bingrep is a small binary version of grep, scanning binary files for a given pattern. Along a match it can display surrounding data as an hexdump of arbitrary size. It is capable to scan more than 4GB.