if condition
 

I am trying to compare two strings using the following code but it gives me error. I have tried couple of options but it does not work.
The code is

read -p "Do you want to continue ? Y/N - " opt
if ["$opt"== "N"];then
do something
fi

and the error I get


./newtest.sh: line 20: [N==: command not found

I have tried this way as well

#!/bin/bash
S1='string'
S2='String'
if [ $S1=$S2 ];

It still gives the same errror.

Any suggestions?

Thanks,

There has to be a space between [ and N. Also at the end of the expression between " and ].
The '[' bracket is the same as the test command.

Thanks for the quick reply.

Last time (as in my previous thread) it gave an error due to space and in this case it gives error if there is a space.

The spaces in "IP = ..." could be the problem. When you initialise variables in Bash, you must not use spaces.

Your help is very much appreciated.