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