ac_desc.sh: line 3: syntax error near unexpected token `do

#!/bin/sh
for file in /www/web/OP/osstest/json12/*
do
	echo "hello"
done

直接执行echo "hello"可以运行，但用do循环就不可以了

原因是，没有执行权限，于是加上chmod x

[root@localhost osstest]# bash mac_desc.sh 
'ac_desc.sh: line 3: syntax error near unexpected token `do
'ac_desc.sh: line 3: `do
[root@localhost osstest]# bash mac_desc.sh 
hello
[root@localhost osstest]# chmod +x mac_desc.sh 
[root@localhost osstest]# ./mac_desc.sh 
-bash: ./mac_desc.sh: /bin/sh^M: bad interpreter: ûÓÐÄǸöÎļþ»òĿ¼

还是报错，是因为windows上的换行符不同。于是装个dos2unix转换一下，即可。

yum install dos2unix

dos2unix  mac_desc.sh 
dos2unix: converting file mac_desc.sh to UNIX format ...
[root@localhost osstest]# ./mac_desc.sh 
hello
hello
hello
hello
hello
hello
hello
hello
hello
hello
hello