Scope sed commands to specific lines
Use sed addresses to target chunks of text between two patterns, and more
Flight manual for posix
Scope
Redirection 101: the very basics
Disclaimer: this article is tailored to those of us who are taking
their first steps in the CLI.
A seasoned user is still likely to find some quite interesting information
in the various notes, but the main focus of the article still is only
meant to level the playing field in order to approach the everything is a
file series.
Useless use of cat
The signature of the shell-illiterate