Question

I have a bash script:

#!/bin/bash
JAVA_VERSION="1.6.0_17"
_STDOUT=`java -version`

if [ $JAVA_VERSION = $_STDOUT ]; then
        echo "Matched"
else
        echo "Not Matched"
fi

i get the result:

java version "1.6.0_17"
OpenJDK Runtime Environment (IcedTea6 1.7.5) (rhel-1.16.b17.el5-x86_64)
OpenJDK 64-Bit Server VM (build 14.0-b16, mixed mode)
t4.sh: line 8: [: 1.6.0_17: unary operator expected
Not Matched

How would i match $JAVA_VERSION with $_STDOUT
when $_STDOUT has multiple lines

Answer 1

Use quotes.

#!/bin/bash
JAVA_VERSION="1.6.0_17"
_STDOUT=`java -version`

if [ "$JAVA_VERSION" = "$_STDOUT" ]; then
        echo "Matched"
else
        echo "Not Matched"
fi