su：Swith user 切换用户，切换到root用户
cat: Concatenate 串联
uname: Unix name 系统名称
df: Disk free 空余硬盘
du: Disk usage 硬盘使用率
chown: Change owner 改变所有者
chgrp: Change group 改变用户组
ps：Process Status 进程状态
tar：Tape archive 解压文件
chmod: Change mode 改变模式
umount: Unmount 卸载
ldd：List dynamic dependencies 列出动态相依
insmod：Install module 安装模块
rmmod：Remove module 删除模块
lsmod：List module 列表模块
alias :Create your own name for a command
bash :GNU Bourne-Again Shell linux内核
grep:global regular expression print
httpd :Start Apache
ipcalc :Calculate IP information for a host
ping :Send ICMP ECHO_Request to network hosts
reboot: Restart your computer
sudo:Superuser do
/bin = BINaries
/dev = DEVices
/etc = ETCetera
/lib = LIBrary
/proc = PROCesses
/sbin = Superuser BINaries
/tmp = TeMPorary
/usr = Unix Shared Resources
/var = VARiable ?
FIFO = First In, First Out
GRUB = GRand Unified Bootloader
IFS = Internal Field Seperators
LILO = LInux LOader
MySQL = My最初作者的名字SQL = Structured Query Language
PHP = Personal Home Page Tools = PHP Hypertext Preprocessor
PS = Prompt String
Perl = “Pratical Extraction and Report Language” = “Pathologically Eclectic Rubbish Lister”
Python Monty Python’s Flying Circus
Tcl = Tool Command Language
Tk = ToolKit
VT = Video Terminal
YaST = Yet Another Setup Tool
apache = “a patchy” server
apt = Advanced Packaging Tool
ar = archiver
as = assembler
bash = Bourne Again SHell
bc = Basic (Better) Calculator
bg = BackGround
cal = CALendar
cat = CATenate
cd = Change Directory
chgrp = CHange GRouP
