Linux in a Nutshell, 6th Edition

Text Processing

Command	Action
col	Process control characters.
cut	Select columns for display.
emacs	Work environment with powerful text-editing capabilities.
ex	Line editor underlying vi.
expand	Convert tabs to spaces.
fmt	Produce roughly uniform line lengths.
fold	Break lines.
gawk	Process lines or records one by one.
groff	Format troff input.
gs	Display PostScript or PDF file.
ispell	Interactively check spelling.
join	Merge different columns into a database.
paste	Merge columns or switch order.
rev	Print lines in reverse.
sed	Noninteractive text editor.
sort	Sort or merge files.
tr	Translate (redefine) characters.
unexpand	Convert spaces to tabs.
uniq	Find repeated or unique lines in a file.
vi	Visual text editor.
vim	Enhanced version of vi.