filetype = `/usr/bin/file -bz #{trace_name}`.chomp
gzipped = filetype =~ /gzip compressed/
bzipped = filetype =~ /bzip2 compressed/
filetype = `/usr/bin/file -bz #{trace_name}`.chomp
gzipped = filetype =~ /gzip compressed/
bzipped = filetype =~ /bzip2 compressed/