Welcome!

automation

case sensitivity

color

command prompt (Windows)

command substitution

completion

compression, lossless

compression, lossy

contacting us

cygwin

dependency

desktop environment

directory

disk format

disk format, ext4

disk format, vfat

disk partition

distribution

distribution, ArchLinux

distribution, Debian/Ubuntu

distribution, RedHat/Fedora

DLL

environment variable

file type, binary

file type, disk image

file type, hidden (dot files)

file type, image

file type, PDF

file type, text

filename extension

filesystem

filesystem hierarchy standard

filesystem, virtual

folder

free software

geometry

GNU

group

history

image, crop

image, resize

ImageMagick

journal

link, symbolic

octal

package

package manager, apt

package manager, brew

package manager, pacman

package manager, yum

password

path, absolute

path, relative

permissions

philosophy

pipeline

quoting

rationale for command line

read-only

redirection

script, Python

script, shell

security

server

spaces

standard error

standard input

standard output

syntax

Terminal (Mac)

text editor

USB drive

Utilities (Mac)

variable

virtual machine

wildcard

WYSIWYG

YYYYMMDD date format

!$ (last word)

#! (hash-bang)

$() (command substitution)

* wildcard

--help

--version

.. (parent dir)

.bashrc

.bash_profile

.gz

.png

.tar

.zip

. (current dir)

/bin

/bin (essential commands)

/boot (kernel images)

/dev (device files)

/etc/passwd (user database)

/etc (system config dir)

/home (user dirs)

/lib (libraries)

/proc (process information)

/root (home of admin user)

/usr/local (user-installed software)

/usr (package-managed software)

/var (variable data files)

/ (root directory)

< (redirect stdin)

>& (redirect stdout and stderr)

>> (append stdout)

> (redirect stdout)

>| (redirect and clobber)

? wildcard

alias

apt-cache search

apt-cache show

apt-cache (query package cache)

apt-get autoremove

apt-get install -f (force)

apt-get install

apt-get purge

apt-get remove

apt-get update

apt-get upgrade

apt-get (package manager)

bash (default shell)

cat (concatenate files)

cd - (previous dir)

cd (change working dir)

chmod (change permissions)

clear (clear screen)

convert -blur

convert -bordercolor

convert -border

convert -geometry (resize image)

convert (process image)

cp -a (archive)

cp -r (recursive)

cp -v (verbose)

cp (copy files and dirs)

cut -c (characters)

cut -d (delimiter)

cut -f (fields)

cut (select fields)

display (show image)

dpkg -L (list files)

dpkg -l (list packages)

dpkg -S (search for filename)

dpkg (package tool)

du -s (summarize)

du (disk usage)

echo (display text)

env (show environment)

eog (GNOME image viewer)

export (designate environment variable)

fdisk (edit partition table)

file (show file type)

find -delete

find -empty

find -exec

find -iname

find -maxdepth

find -name

find -newer

find -print0

find -print

find -type

find (search files)

for loop

gedit (desktop editor)

gimp (photoshop)

git (version control)

grep --color

grep -c (count)

grep -i (ignore-case)

grep -l (files-with-matches)

grep -n (line-number)

grep -r (recursive)

grep -s (no-messages)

grep (show matching lines)

head -n (lines)

head (first few lines)

identify -verbose

identify (describe image files)

inotify (monitor filesystem events)

less (pager)

less search (/)

locate -i (ignore-case)

locate (find files by name)

ls -a (all)

ls -F (classify)

ls -l (long)

ls -r (reverse)

ls -t (sort by mtime)

ls (list files)

man (show manual page)

mkdir -p (parents)

mkdir (make dirs)

mkfs (build Linux filesystem)

mogrify -crop

mogrify -format

mogrify -geometry (resize)

mogrify (process image in-place)

more (pager)

mount -o (options)

mount (attach filesystem)

mv -i (interactive)

mv -n (no-clobber)

mv -t (target-directory)

mv (move or rename files)

nano (editor)

od (octal dump)

open -e (Mac TextEdit)

open (Mac desktop)

PATH variable

pwd (print working dir)

reset (initialize terminal)

rm -f (force)

rm -i (interactive)

rm -r (recursive)

rmdir (remove empty dirs)

rm (remove files or dirs)

rwx (permissions)

set -e (stop on error)

set -o noclobber

sort -n (numeric)

sort -r (reverse)

sort (put lines in order)

source (execute in current shell)

sudo -s (shell)

sudo (run as administrator)

tail -n (lines)

tail (last few lines)

touch (change file timestamps)

tree (list dirs in tree-like form)

umount (detach filesystem)

uniq -c (count)

uniq (omit repeated lines)

unzip (extract compressed files)

updatedb (update locate data)

which (show path of command)

xargs -0 (split on null)

xargs (build cmd from stdin)

xdg-open (Linux desktop)

xterm

[] wildcard

\ (backslash)

^C (interrupt)

^D (end of input)

^L (clear)

^R (reverse-i-search)

` (command substitution)

{} wildcard

| (pipe)

~ (home directory)