shell - String comparison in bash is not working

Question

Hi I'm new to bash scripting. Just wrote this simple program but it is throwing error.

#!/bin/bash
os=`uname -o`
echo $os
if ["$os"=="GNU/Linux"] ; then
    echo "Linux"
else
    echo "Windows"
fi 

Using == or -eq for both cases I'm getting the following error and it is printing the else condn.

./ostype.sh: line 3: [GNU/Linux==GNU/Linux]: No such file or directory

Windows

Bash version : GNU bash, version 3.2.48(1)-release (x86_64-suse-linux-gnu)

Answer 1

try

if [ "$os" = "GNU/Linux" ]

note the spaces, and the single =.

[ is actually a program, and the rest are arguments!