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³ÌÐòÒ»£ºHelloWord,ÔÚÆÁÄ»Êä³öHelloWord
ÀûÓÃvim ´´½¨Ò»¸ösh01.shÎļþ
echo -e "Hello World!\a\n"
exit 0

³ÌÐò¶þ£º½«ÊäÈë²ÎÊýÆ´½ÓºóÊä³ö
read -p "First Name:" firstname
read -p "Last Name:" lastname
echo -e "\n your full name is:$firstname $lastname"
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echo -e "I will use touch comand to create 3 file.\n"
read -p "please input the filename what you want:" fileuser
filename=${fileuser:-"filename"}
date1=`date --date='2 days ago' +%Y%m%d`
file1="$filename""$date1"
touch $file1".log"

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[root@localhost scripts]# cat sh4.sh
read -p "first:" first
read -p "second:" second
total=$(($first*$second))
echo -e "\n========>$total"

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[root@localhost scripts]# cat sh5.sh
echo -e "input filename"
read -p "input the filename you want:" filename
test -z $filename && echo "\filename can't be null" && exit 0
test ! -e $filename && echo "file not exist!" && exit 0
test -f $filename && filetype="regulare file"
test -d $filename && filetype="directory"
test -r $filename && perm="readable"
test -w $filename && perm="$perm writable"
test -x $filename && perm="$perm executable"
echo "The filename:$filename is a $filetype"
echo "And the permission are :$perm"

³ÌÐòÁù£ºif else
[root@localhost scripts]# cat sh6.sh
echo "hello world ,shell"
[ -n "$0" ] && echo "$0" || exit 0
[ -n "$1" ] && echo "$1" || exit 0
echo "shell over!"
exit 0
#µ÷ÓÃʱ²ÉÓà sh sh6.sh par1 par2
#ÆäÖÐsh6.shΪµÚÒ»¸ö²ÎÊý
#par1ΪµÚ¶þ¸ö²ÎÊý
#$0È¡µÚÒ»¸ö²ÎÊý£¬$1È¡µÚ¶þ¸ö²ÎÊý

³ÌÐò7£ºif else(2)
[root@localhost scripts]# cat sh7.sh
read -p "yes or no (y/n)?" ny
#×¢Òâ¿Õ¸ñ£¡£¡
if [ "$ny" == "Y" ] || [ "$ny" == "y" ]; then
echo "OK,continue"
exit 0
fi
if [ "$ny" == "N" ] || [