If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.
 
Linux sheep 2.6.24.1 #1 Sat Feb 9 15:14:38 CET 2008 i686 GNU/Linux
 
Gnu C                  4.2.3
Gnu make               3.81
binutils               2.18.0.20080103
util-linux             2.13.1
mount                  2.13.1
module-init-tools      3.3-pre11
e2fsprogs              1.40.5
jfsutils               1.1.11
reiserfsprogs          3.6.19
xfsprogs               2.9.5
Linux C Library        2.7
Dynamic linker (ldd)   2.7
Procps                 3.2.7
Net-tools              1.60
Console-tools          0.2.3
Sh-utils               6.10
udev                   114
wireless-tools         29
Modules Loaded         nls_iso8859_15 nls_cp850 vfat fat sg sr_mod usb_storage sha256_generic act_police sch_ingress cls_u32 sch_sfq sch_cbq xt_tcpudp ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_nat_ftp nf_nat nf_conntrack_ftp xt_conntrack nf_conntrack iptable_filter ip_tables ipt_ULOG x_tables nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc tun michael_mic ieee80211_crypt_tkip ieee80211_crypt_ccmp fuse twofish_i586 twofish_common eeprom w83l785ts asb100 hwmon_vid hwmon snd_pcm_oss snd_mixer_oss zd1211rw firmware_class snd_intel8x0 snd_ac97_codec ieee80211softmac i2c_nforce2 pl2303 usbserial ac97_bus snd_pcm snd_timer snd soundcore snd_page_alloc ieee80211 ieee80211_crypt i2c_core