Text Transforms

Core Idea

Linux tools can reshape text without opening an editor.

Practice Alone

Use sed for substitutions and awk for fields.

Done When

You can transform a line and extract a field from a structured file.

Go Deeper

• One-liners explains why sed and awk often appear inside one-line shell programs.
• Regular expressions explains the matching side of sed substitutions.
• Quoting decides whether Bash or the text tool sees $1.