cat /etc/group >> ~/Documents/lifeboat

sort /etc/group > ~/Documents/lifeboat

cp /etc/group ~/Documents/lifeboat

sort /etc/group >> ~/Documents/lifeboat

grep ".\." filename

grep "." filename

grep "\?" filename

grep "\." filename

Fish[PT]ie.odt

Fish?.odt

Fish*ie.odt

Fish??ie.odt

.

+

.*

?

All directories and files excluding hidden files.

All files sorted alphabetically.

All files including hidden ones.

Only files that were modified recently

It compares the contents of two text files

It counts the number of files in a directory

It deletes a text file

It counts words, lines, and characters in a text file

mv planet earth

rename planet earth

rm planet earth

cp planet earth

Remove an empty directory

Remove a non-empty directory

Create a directory

Delete a file

Moves foo1.txt to the Desktop and renames it to foo2.txt without confirmation

Copies foo1.txt and renames it to foo2.txt

Moves foo1.txt and renames it to foo2.txt if a file named foo2.txt already exists

Moves foo1.txt to the Desktop and renames it to foo2.txt, asking for confirmation if foo2.txt exists

One or more occurrences

Zero or one occurrence

Exactly one occurrence

Zero or more occurrences