On this ftp archive you can find files with names ending in '.tar.lz'. Those files are tar archives compressed with lzip. Lzip is used because it compresses better than gzip and bzip2, and because the lzip format is more suitable for long-term archiving. To extract sources that are in files ending in '.tar.lz' you can use the commands tar -xf foo.tar.lz or lzip -cd foo.tar.lz | tar -xf - where 'foo.tar.lz' is the name of the file. Lzip is available in source form on this ftp archive, in the file lzip-N.N.tar.gz (where N.N is the version number - e.g. 1.14). The file lzip-N.N.tar.lz is also available for those who already have lzip but want to get a newer version, since the lzipped file will transfer faster.