http://www.stulog.com/?post=199

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apt = Advanced Packaging Tool
ar = archiver
as = assembler
awk = "Aho Weiberger and Kernighan" 三个作者的姓的第一个字母

bash = Bourne Again SHell
bc = Basic (Better) Calculator
bg = BackGround
bin = BINaries（binary)

cal = CALendar calendar
cat = CATenate
cd = Change Directory
chgrp = CHange GRouP
chmod = CHange MODe
chown = CHange OWNer
chsh = CHange SHell
cmp = compare
cobra = Common Object Request Broker Architecture
comm = common
cp = CoPy
cpio = CoPy In and Out
cpp = C Pre Processor
cron = Chronos 希腊文时间
cups = Common Unix Printing System
cvs = Current Version System

daemon = Disk And Execution MONitor
dc = Desk Calculator
dd = Disk Dump
df = Disk Free
diff = DIFFerence
dmesg = diagnostic message
du = Disk Usage

ed = editor
egrep = Extended GREP
elf = Extensible Linking Format
elm = ELectronic Mail
emacs = Editor MACroS
eval = EVALuate
ex = EXtended
exec = EXECute/dev = devices

fd = file descriptors
fg = ForeGround
fgrep = Fixed GREP
Fish = the Friendly Interactive SHell
fmt = format
fsck = File System ChecK
fstab = FileSystem TABle
FIFO = First In, First Out

gawk = GNU AWK
gpg = GNU Privacy Guard
groff = GNU troff
GRUB = GRand Unified Bootloader

hal = Hardware Abstraction Layer

IFS = Internal Field Seperators

joe = Joe's Own Editor

ksh = Korn SHell

lame = Lame Ain't an MP3 Encoder
lex = LEXical analyser
lisp = LISt Processing = Lots of Irritating Superfluous Parentheses
ln = LiNk
lpr = Line PRint
ls = list
lsof = LiSt Open Files
LILO = LInux LOader

m4 = Macro processor Version 4
man = MANual pages
mawk = Mike Brennan's AWK
mc = Midnight Commander
MIME = Multipurpose Internet Mail Extensions
mkfs = MaKe FileSystem
mknod = MaKe NODe
motd = Message of The Day
mozilla = MOsaic GodZILLa
mtab = Mount TABle
mv = MoVe

nano = Nano's ANOther editor
nawk = New AWK
nl = Number of Lines
nm = names
nohup = No HangUP
nroff = New ROFF

od = Octal Dump

passwd = PASSWorD
pg = pager
pico = PIne's message COmposition editor
pine = "Program for Internet News & Email" = "Pine is not Elm"
ping = Packet InterNet Groper
pirntcap = PRINTer CAPability
popd = POP Directory
pr = pre
printf = PRINT Formatted
ps = Processes Status
pty = pseudo tty
pushd = PUSH Directory
pwd = Print Working Directory

rc = runcom = run command, rc还是plan9的shell
rev = REVerse
rm = ReMove
rn = Read News
roff = RunOFF
rpm = RPM Package Manager = RedHat Package Manager
rsh, rlogin, rvim中的r = Remote
rxvt = ouR XVT

sed = Stream EDitor
seq = SEQuence
shar = SHell ARchive
slrn = S-Lang rn
ssh = Secure SHell
ssl = Secure Sockets Layer
stty = Set TTY
su = Substitute User 或 Switch User（前者较常见）
sudo = superuser / substitue user do
svn = SubVersioN

tar = Tape ARchive
tcsh = TENEX C shell
tee = T (T形水管接口)
telnet = TEminaL over Network
termcap = terminal capability
terminfo = terminal information
tex = τ?χνη的缩写，希腊文art
tr = traslate
troff = Typesetter new ROFF
tsort = Topological SORT
tty = TeleTypewriter
twm = Tom's Window Manager
tz = TimeZone

udev = Userspace DEV
ulimit = User's LIMIT
umask = User's MASK
uniq = UNIQue

vi = VIsual = Very Inconvenient vim = Vi IMproved

wall = write all
wc = Word Count
wine = WINE Is Not an Emulator xargs = eXtended ARGuments

xdm = X Display Manager
xlfd = X Logical Font Description
xmms = X Multimedia System
xrdb = X Resources DataBase
xwd = X Window Dump

yacc = yet another compiler compiler
YaST = Yet Another Setup Tool