linux下常用简写命令的全称
/bin = BINaries
/dev = DEVices
/etc = ETCetera  附加物或  
EdiTable Configure file 配置文件
/proc = PROCesses
/sbin = Superuser 
BINaries
/usr = Unix Shared Resources
apt = Advanced Packaging 
Tool 
bash = Bourne Again SHell 
cal = CALendar 连续
cat = CATenate 
cd = Change Directory 
chgrp = CHange GRouP 
chmod = CHange MODe 模式
chown = CHange OWNer 
chsh = CHange SHell 
cmp = compare 
df = Disk 
Free 
du = Disk Usage 
fdisk  暂无 磁盘分区命令
grep search for a pattern 
using regular expression
ln = LiNk 
ls = list 
mkfs = MaKe FileSystem 
nl = Number of Lines 
nm = names
od = Octal Dump 八进制  倒垃圾,倾泻
pwd = Print Working Directory 
rpm = RPM Package Manager = RedHat Package 
Manager 
stty = Set TTY
su = Substitute User 代替用户
sudo = super user 
do
tar = tape archive  整理归档
tty = TeleTypewriter 
umask = User‘s 
MASK 面具
vi = VIsual = Very Inconvenient 
vim = Vi IMproved 
wall = 
write all 
wc = Word Count 
wine = WINE Is Not an Emulator 
xargs = 
eXtended ARGuments