【shell】判断字符串是否包含子串

https://blog.csdn.net/iamlihongwei/article/details/59484029

if [[ $line =~ "<BEGIN>" ]] 
then
	echo "包含<BEGIN>"
elif [[ $line =~ "<SEG>" ]]
then
	echo "包含<SEG>"
else
	echo "都不包含"
fi