Display file contents

View file contents interactively

Output first part of files

Translate or delete characters

text

translate

transform

tr

tr translates, squeezes, and/or deletes characters from standard input.

Convert to uppercase

tr 'a-z' 'A-Z' < file.txt

Remove spaces

tr -d ' ' < file.txt

Squeeze multiple spaces

tr -s ' ' < file.txt

Output last part of files

Search for patterns in files

Vi improved text editor