If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.
 
Linux linux1 2.4.21-0.13mdk #1 Fri Mar 14 15:08:06 EST 2003 i686 unknown unknown GNU/Linux
 
Gnu C                  3.2.2
Gnu make               3.80
util-linux             2.11x
mount                  2.11x
module-init-tools      2.4.22
e2fsprogs              1.32
PPP                    2.4.1
Linux C Library        2.3.1
Dynamic linker (ldd)   2.3.1
Procps                 3.1.6
Net-tools              1.60
Console-tools          0.2.3
Sh-utils               4.5.7
Modules Loaded         isofs nls_iso8859-15 ppp_deflate zlib_inflate zlib_deflate bsd_comp udf binfmt_misc parport_pc lp parport sg st sr_mod sd_mod scsi_mod ipt_TOS ipt_MASQUERADE ipt_LOG ipt_REJECT ipt_state iptable_mangle ip_nat_irc ip_nat_ftp iptable_nat ip_conntrack_irc ip_conntrack_ftp ip_conntrack iptable_filter ip_tables snd-seq-midi snd-seq-oss snd-seq-midi-event snd-seq snd-pcm-oss snd-mixer-oss snd-cs46xx snd-ac97-codec snd-rawmidi snd-seq-device snd-pcm snd-timer gameport snd-page-alloc snd soundcore nfsd ppp_async ppp_generic slhc af_packet ide-floppy ide-tape ide-cd cdrom floppy 3c59x supermount printer usb-ohci usbcore rtc ext3 jbd