Shell Programming and Scripting

 
if [[ $string1 = $string2 ]] 
and
if [[ $string1 == $string2 ]]

 
#!/usr/bin/ksh
string1=test1
string2=test2
if [[ $string1 == string2 ]];then OR if [[ $string1 = string2 ]];then 
echo "strings are same"
else
echo "strings are different"
fi

if [[ $string1 == $string2 ]];then OR if [[ $string1 = $string2 ]];then

#!/usr/bin/ksh
string1=test1
string2=test2
if [ "${string1}" = "${string2}" ]
then
        echo "strings are same"
else
        echo "strings are different"
fi

#!/usr/bin/ksh
string=unix_linux

if [[ $string == "unix*" ]];then (note: i tried with single quotes as well 'unix*')
echo "matches"
else
echo "not matches"
fi