Unpack the file using command for the tar.gz file:
$ tar -xzvf tigase-server-x.y.z-bv.tar.gz
or for the zip file:
$ unzip tigase-server-x.y.z-bv.zip
A new directory will be created: tigase-server-x.y.z-bv/.
Sometimes after unpacking package on unix system startup script doesn’t have execution permissions. To fix the problem you have to run following command:
$ chmod u+x ./scripts/tigase.sh