Linux Cheat Sheet

Follow these fast links:

Logging In
Logging Out
Floppy Saving & Importing
Linux File System
File Viewers
Text Editors
Printing
Programming Languages
Online Documentation

**Logging In**
Steps	What to Do
Step 1	Boot the Computer
Step 2	Tap the SHIFT key when LILO appears (A 5-second delay is built in.)
Step 3	Type the word linux
Step 4	Login: YourID
Step 5	Password: YourPassword
Step 6	$ startx -- -bpp 16

Logging Out
Steps What to Do

Step 1 Hold down CTRL & ALT and tap BACKSPACE

Step 2 $ exit

Step 3 Hold down CTRL & ALT and tap DELETE

Step 4 When the screen goes blank, turn off the machine.

Floppy Saving & Importing
mdir View Directory of Floppy

mcopy filename a: Copy from current dir to floppy

mcopy a:filename . Copy from floppy to current dir

**Floppy Saving & Importing**
mdir	View Directory of Floppy
mcopy filename a:	Copy from current dir to floppy
mcopy a:filename .	Copy from floppy to current dir

Linux File System
LiSt filenames ls

hidden files ls -a

file permissions ls -l

CoPy file cp srcname dstname

CoPy file to directory cp filename dirname

Rename (MoVe) mv oldname newname

MoVe to Dir mv filename dirname

ReMove (delete) file rm filename

Change to Home Dir cd

Move Up a Dir cd ..

Move Down into a Dir cd dirname

MaKe new DIR mkdir dirname

ReMove DIR rmdir dirname

Print Working Dir pwd

Find File find Dir -name filename

N.B. Linux has path and filename completion when the name typed so far is unique. Tap the TAB key to complete. If the computer beeps, tap TAB twice to see the list of possible completions.

**Linux File System**
LiSt filenames	ls
hidden files	ls -a
file permissions	ls -l
CoPy file	cp srcname dstname
CoPy file to directory	cp filename dirname
Rename (MoVe)	mv oldname newname
MoVe to Dir	mv filename dirname
ReMove (delete) file	rm filename
Change to Home Dir	cd
Move Up a Dir	cd ..
Move Down into a Dir	cd dirname
MaKe new DIR	mkdir dirname
ReMove DIR	rmdir dirname
Print Working Dir	pwd
Find File	find Dir -name filename

File Viewers
less filename More versatile than more
SPACE -- Screen Forward; B -- Screen Back; ENTER -- Line Forward; Q -- Quit; Exits at EOF

more filename Classic file lister
SPACE or F -- Screen Forward; B -- Screen Back; ENTER -- Line Forward; Q -- Quit; Does NOT Exit at EOF

cat filename Writes whole file to screen

head [-n5] filename Writes beginning of file to screen
Default is the first 10 lines

tail [-n5] filename Writes end of file to screen
Default is the last 10 lines

**File Viewers**
less filename	More versatile than more SPACE -- Screen Forward; B -- Screen Back; ENTER -- Line Forward; Q -- Quit; Exits at EOF
more filename	Classic file lister SPACE or F -- Screen Forward; B -- Screen Back; ENTER -- Line Forward; Q -- Quit; Does NOT Exit at EOF
cat filename	Writes whole file to screen
head [-n5] filename	Writes beginning of file to screen Default is the first 10 lines
tail [-n5] filename	Writes end of file to screen Default is the last 10 lines

Text Editors
joe Editor like WordStar

vi The classic Unix line editor

**Text Editors**
joe	Editor like WordStar
vi	The classic Unix line editor

Printing
Print file lpr filename

View printer queue lpq

Remove job #jn lprm jn // From lpq

**Printing**
Print file	lpr filename
View printer queue	lpq
Remove job #jn	lprm jn // From lpq

Programming Languages
Assembler as

GNU C gcc

GNU C++ g++

GNU Debugger gdb

Java java, javac, appletviewer

perl perl

**Programming Languages**
Assembler	as
GNU C	gcc
GNU C++	g++
GNU Debugger	gdb
Java	java, javac, appletviewer
perl	perl

Online Documentation
man progname Original standard version
Uses more; Q to Quit

man -k keyword Use man to search for keyword

xman X Window version

man progname	Original standard version Uses more; Q to Quit
man -k keyword	Use man to search for keyword
xman	X Window version