unix tar
# Create
tar -cf file.tar files # create a tar containing "files"
tar -czf file.tar.gz files # create a tar with Gzip compression
tar -cjf file.tar.bz2 files # create a tar with Bzip2 compression
# Extract
tar -xf file.tar # extract files from tar
tar -xzf file.tar.gz # extract files from tar using Gzip
tar -xjf file.tar.bz2 # extract files from tar using Bzip2