OS Commads

description	FreeBSD	Linux	Mac OS X	Solaris	Windows (cmd)
list directory	ls	ls	ls	ls	dir
clear console	clear	clear	clear	clear	cls
copy file(s)	cp	cp	cp	cp	copy
move file(s)	mv	mv	mv	mv	move
rename file(s)	mv	mv, rename	mv	mv	ren, rename
delete file(s)	rm	rm	rm	rm	del (erase)
delete directory	rmdir	rmdir	rmdir	rmdir	rd (rmdir)
create directory	mkdir	mkdir	mkdir	mkdir	md (mkdir)
change current directory	cd	cd	cd	cd	cd (chdir)
run shell script with new shell	sh file.sh	sh file.sh	sh file.sh	sh file.sh	cmd /c file.cmd
kill processes	kill, killall	killall, pkill, kill	kill, killall	kill, pkill	taskkill
change process priority	nice	nice, chrt	nice	nice	start /low, start /normal, start /high, start /realtime
change io priority	?	ionice	nice	?	?
create file system	newfs	mkfs	mkfs	newfs	format
file system check and recovery	fsck	fsck	fsck	fsck	chkdsk
create software raid	atacontrol, gmirror, zfs create	(mdadm—create)	diskutil appleRAID	metainit, zfs create	diskpart (mirror only)
mount device	mount	mount	mount, diskutil mount	mount	mountvol
unmount device	umount	umount	umount, diskutil unmount(disk)	umount	mountvol /d
mount file as block device	mdconfig + mount	mount -o loop	hdid	lofiadm + mount	?
show network configuration	ifconfig	ip addr, ifconfig	ifconfig	ifconfig	ipconfig
show network route	route	ip route	route	route	route
trace network route	traceroute	traceroute	traceroute	traceroute	tracert
trace network route with pings	traceroute -I	traceroute -I & mtr	traceroute -I	traceroute -I	pathping
description	FreeBSD	Linux	Mac OS X	Solaris	Windows (cmd)

Table from Wikipedia