String checking

[dude70_1]

Hi Guys,

In my shell script I have 2 strings:

s1="test string"
s2=" this is a test string but it is longer"

I have to find whether s2 contains s1 if true I have to some operation any command help will be helpful.

Thanks.

[James A. Donovan]

echo $s2|grep "$s1"

[Karthik S S · Accepted solution]

Edit your script to look like this,

s1="test string"
s2=" this is a test string but it is longer"
echo $s2 |grep "\<$s1\>"
if [ $? -eq 0 ]
then
echo s2 contains s1
fi

-Karthik S S

[Michael Schulte zur Sur]

Hi,

expr "${s2}" : ".*\(${s1}\).*"

returns s1 if it is included in s2.

have fun,

Michael