Bash Linux commands

Convert tabs to spaces

expand

Set an environment variable

export

Evaluate expressions

expr

Do nothing, unsuccessfully

false

Low-level format a floppy disk

fdformat

Partition table manipulator for Linux

fdisk

Send job to foreground

fg

Search file(s) for lines that match a fixed string

fgrep

Determine file type

file

Search for files that meet a desired criteria

find

Reformat paragraph text

fmt

Wrap text to fit a specified width.

fold

Expand words, and execute commands

for

Format disks or tapes

format

Display memory usage

free