linux 命令
/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是最初作者女儿的名字，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 得名于电视剧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
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
biff = 作者Heidi Stettner在U.C.Berkely养的一条狗,喜欢对邮递员汪汪叫。
cal = 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
fd = file descriptors
fg = ForeGround
fgrep = Fixed GREP
fmt = format
fsck = File System ChecK
fstab = FileSystem TABle
fvwm = F*** Virtual Window Manager
gawk = GNU AWK
gpg = GNU Privacy Guard
groff = GNU troff
hal = Hardware Abstraction Layer
joe = Joe's Own Editor
ksh = Korn SHell
lame = Lame Ain't an MP3 Enc
相关文档：
一、安装内核模块:
一般步骤：
(1) 在/usr/src/linux/下运行make menuconfig把需要编译成模块的项打上(M)，保存并退出。
(2) 运行make modules，这一步将在/usr/src/linux/下生成*.o或*.ko文件。
(3) 运行make modeules_install来安装,这步会把生成的.o或ko文件拷贝到/lib/modules/`uname -r`/下。
如果你只要编 ......
有两段代码：
#!/bin/sh
if [ $#=0 ]
then
echo "Name not provided"
else
echo "You name is $1"
fi
#!/bin/sh
if [ $#=0 ]; then echo "Name not provided"
else echo "You name is $1"
fi
名字为mypgm1
第 ......
1. 日志简介
日志对于安全来说，非常重要，他记录了系统每天发生的各种各样的事情，你可以通过他来检查错误发生的原因，或者受到攻击时攻击者留下的痕迹。日志主要的功能有：审计和监测。他还可以实时的监测系统状态，监测和追踪侵入者等等。
在Linux系统中，有三个主要的日志子系统：
连接时间 ......
mysql 截取某一个时间(datetime类型)的日期：
方法1：select date(row_name) from table_name where row = row1;
方法2：select left(row_name, 10) from table_name where row = row1;
方法3：select cast(row_name as char[10]) from table_name where row = row1;
取得某个日期的time_t数值：select unix_times ......
