#!/bin/bash 
 
for file in $(ls /tmp/test/mytest |grep sh)  //for in格式是shell for的基本格式，根js的for in類似 
do        //循環(huán)開始你就把它當(dāng)成{ 
 echo $file 
done       //循環(huán)結(jié)束你就把它當(dāng)成} 
 
for ((i=0;i<10;i++))    //注意是雙小括號，由于受其他語言的影響，很容易搞錯(cuò) 
do 
 echo -n $i 
done 
 
echo \   //輸出換行 
 
for i in 0 1 2 3 4 5 6 7 8 9 
do 
 echo -n $i 
done 
 
echo \ 
 
for i in "0 1 2 3 4 5 6 7 8 9"  //這個(gè)根上面是有區(qū)別的，這個(gè)循環(huán)只循環(huán)了一次，雙引號里面只是一個(gè)變量 
do 
 echo -n $i 
done 
 
exit 0 

#!/bin/bash 
i=0 
while ((i<10)) 
do 
 echo $i 
 ((i += 1)) 
done 
 
i=0 
while [ $i -lt 10 ] //注意括號內(nèi)側(cè)二邊的空格 
do 
 echo $i 
 let "i+=1"  //加1 
done 
exit 0 

#!/bin/bash 
 
END_CONDITION=end 
until [ "$var1" = "$END_CONDITION" ] //讀取的變量根設(shè)定的變量相等時(shí)退出循環(huán)，不然永遠(yuǎn)循環(huán) 
do 
 echo "Input variable #1 " 
 echo "($END_CONDITION to exit)" 
 read var1 
 echo "variable #1 = $var1" 
 echo 
done  
exit 0 

#!/bin/bash 
 
echo "Input a number #1 " 
read num 
echo "variable #1 = $num" 
 
if [ $num -lt 60 ]  //注意lt前面的-，很容易忘的 
then 
 echo "you are not pass" 
elif [ $num -lt 70 ] && [ $num -ge 60 ] //多個(gè)條件的判斷 
then 
 echo "pass" 
elif [[ $num -lt 85 && $num -ge 70 ]] //如果放在一起，要注意是雙方括號，不要寫成[ $num -lt 85 && $num -ge 70 ] 
then 
 echo "good" 
elif (( $num <= 100 )) && (( $num >= 85 )) //對于有語言基礎(chǔ)的人來說，這種寫法讓人覺得很舒服，不要忘了是雙小括號 
then 
 echo "very good" 
else 
 echo "num is wrong" 
fi                 //if要有結(jié)束標(biāo)簽的，根XML很像,不閉合，就報(bào)錯(cuò) 
 
exit 0

#!/bin/sh 
case $1 in 
 start) 
 echo "start ok" 
 ;;    //注意一點(diǎn)，要注意是雙分號 
 stop) 
 echo "stop ok" 
 ;; 
 restart) 
 echo "restart ok" 
 ;; 
 *) 
 echo "no param" 
 ;; 
esac   //注意閉合標(biāo)簽 
exit 0 
 
[root@krlcgcms01 forif]# sh c1.sh stop 
stop ok