Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [W] [Y] [Z] Gateways Genmasks GID (Group ID) grep command -R (recursive) option case-insensitive option limiting results to matched files line numbers of results, showing outputting lines near matched terms outputting names of files containing matches regular expressions searching command output searching for negative matches searching text files for patterns searching within results versions of whole words, limiting searches to Group ID (GID) gunzip command gzip command 2nd |