ubuntu shell编程笔记

and 命令

if  [   A  -a   B ]

then

else

fi

set command

set  these are parameters

$1

set

strings

str="A is a"

echo "$str"

a=30 b=15
echo `expr $a +$ b`
echo `expr $a -$ b`
echo `expr $a \*$ b`
echo `expr $a /$ b`
echo `expr $a %$ b`

The Internal Field Separator

IFS=: 

set ":" as field separator S1:S2:...

ubuntu shell编程笔记,布布扣,bubuko.com

ubuntu shell编程笔记

原文：http://www.cnblogs.com/huashiyiqike/p/3751266.html