Linux consists of two things: FILES and PROCESSES - http://johnmeister.com/linux/Overview/
5 commands:	man, ls, cd, pwd, more		Linux consists of:	FILES and PROCESSES
manual pgs(RTM) and --help	man ; also GNU "--help"		special characters:	& ; | * ? ' " ` [ ] ( ) $
list - names only:	ls		special characters:	< > { } ^ # / \ % ! ~ -
list, including dirs:	ls -al		process control: ps, top	using kill
list, excluding ". and .."	ls -Al		stdin, stdout, stderr	redirect < > pipe: |    2>/dev/null
many options:  ls --help	ls --help		REGEX:
list SORTED by size	ls  -AlS		Regular Expressions	awk
list by TIME	ls -Alt		regex	sed
change dir, return "home":	cd		regex	grep
chg dir absolute or relative:	cd [path]		tools and filters:	head / tail
present working directory:	pwd		perl and find	find / xargs / perl
in Linux, less is...	more		display tools	tee [-a] / echo
vi Editor:			filters	tr / col -b / expand
vi Editor: (summary)	vi <filename>  (link to vi 101)		sort, eliminate dups	sort / uniq
hidden cursor keys:	h,j,k,l		manipulate text	cut / paste / join / split
move left	h		compare files	diff / cmp
move down	j		word count	wc [-l]
move up	k		SSH:
more right	l		user managed	authorized_keys
command mode	<esc> <command>		system managed	known_hosts
edit or INSERT mode	i, I, a, A, o, O <start typing>		rsync & scp	scp (-rp)
beginning of line	0		ssh passwdless logins	ssh [-l <user>] hostname (ip)
end of line	$		id_rsa.pub	ssh-keygen
delete	x, dd(line), D or d$(end of line)		NETWORK:
to save:	<esc> :w		ip a	ifconfig [-a]
save as new file:	<esc> :w <filename>		netstat	nslookup
exit w/out saving:	<esc> :q!		ping	traceroute
save and exit:	<esc> :wq		hostname	route
exit forcing save:	<esc> :wq!		File systems:
SHELL:			tree -L 2	du -sh  / df  -h
BASH - Bourne Again Shell	.bashrc		fdisk -l	fdisk, parted, gparted
shell built-ins	env / echo / fg / bg / jobs		fsck /dev/sdb1	fsck
shell aliases:	alias ll="ls -al"		mkfs -t ext4 -V /dev/sdb1	mkfs
File management:			step by step setup of LVM	pv / vg / lv -display
change owner & permissions	chown / chmod		/etc/fstab	mount / umount
copy (-r recurisve, p-preserve)	cp (-rp)		Admin:
locate by name if indexed	locate		passwd, group, shadow	adduser / deluser
ls OPEN files	lsof		crontab	crontab & wget
move files and directories	mv		last	w  /who / uptime
remove(-r recursive)/ rmdir	rm (-rf)		sysstat pkg	vmstat / iostat
touch file (create)	touch		RedHat Package Management:	rpm
tree -L 2 - display dirs	tree		zip	tar
which locates commands	which		Yellowdog Update Manager	yum
Over 250 Distributions	https://distrowatch.com/		Recommended Browser	Firefox - Mozilla (Netscape)
Linux Mint - MATE	Linux Mint MATE desktop		Suggested Email tool	Thunderbird
Centos / (RedHat)	https://centos.org		Preferred Office Suite	OpenOffice Suite
Older Linux Overview:	Overview of LINUX pdf		Default imaging tool	GIMP
2014-2019 Linux at Lunch	Linux at Lunch 2014-2019		Image Editing tool	darktable ~(lightroom)