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I want to combine 2 conditional statements by using -o in bash, but it won't work.

if [ ( $1 -lt 1 ) -o ( $1 -gt $nr ) ] ; then
echo "The number needs to be between 0 and $nr"
fi

Each time i...

Easy enough, but it worked. My book said one = should be enough

I try to compare the day and month of someones birthday with the day and month of today, so my little bash script can send a mail to the person that has its birthday that day.

The first line of...