If you have a file with .tar.bz2 extension you can easily unzip it with a tar command on the commandline. Here is the actual command
tar -xvjpf filename.tar.bz2
In addition .bz files can also be opened / unzip with a bunzip2 command as follow. However this command will only work if you have already bunzip2 installed.
unzip multiple files...
bunzip2 1_14686_629553575.arc.bz2 1_14687_629553575.arc.bz2 1_14688_629553575.arc.bz2