Awk, sed, shell programming and vi and emacs Learning

IBM engineers have written these articles too well. I really want to copy them all. It's a bit lazy, and the whole link has been directly connected. Haha.

The essence of awk:

Awk instance, Part 1-an excellent language with a strange name

Awk instance, Part 1-records, loops, and Arrays
Awk instance, Part 1 -- string functions and ...... Invoice book?

Clever Use of awk to process binary data files

Sed essence:

Sed instance, part 1
Sed instance, part 1
Sed instance, part 1

VI & Emacs:
VI getting started -- form Method

Living in Emacs

Emacs editing environment, Part 1: helping you out of the predicament

Bash tips:

Tip: understand text utilities
Use the GNU text Utility
Tip: Remove duplicate rows with uniq
Developer notes-sharing the development skills of experienced Linux programmer Spence Murray
Tip: Use tr to filter files

Shell script debugging technology
Test functions using bash shell scripts