Bash String extraction

Question

I have a really easy problem that I am not able to solve quickly. I must extract a substring from something like this:

a="www.himom.com/byebye"

I want to retrieve this:

"/byebye"

Actually, I am able to retrieve

"www.himom.com" with

echo ${a%/*}

Any suggestions?

Answer 1

尝试这个：

 a="www.himom.com/byebye"; echo "/${a##*/}"

Answer 2

尝试以下操作： echo /${a##*/}它删除以'/'结尾的最长子字符串。

Answer 3

To leave the slash in the string

shopt -s extglob
echo "${a##*([^/])}"

Answer 4

我是个懒人。解决方案是：

${a##*/}

Answer 5

$ a="www.himom.com/byebye" | echo ${a##*m}
/byebye

Answer 6

You can extract your desired substring with a regex:

a="www.himom.com/byebye"
echo `expr match "$a" '.*\(\/.*\)'`