. thoroughly. Because there is a natural progression in learning from grep to sed to awk, we will be covering all three programs, although the focus is on sed and awk. Sed and awk are tools used by users,. awks, describes the original V7 version of awk, the current Bell Labs awk, GNU awk (gawk) from the Free Software Foundation, and mawk, by Michael Brennan. The latter three all have freely available. source code : 11.2.3. GNU awk (gawk) mawk source code : 11.2.4. Michael's awk (mawk) sample programs : Sample Programs sed source code : Availability of sed and awk octal numbers : 7.6....