If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.

Linux debianPro 4.9.0 #1 SMP Sat Dec 31 18:40:31 CET 2016 x86_64 GNU/Linux

GNU C               	4.9.2
GNU Make            	4.0
Binutils            	2.25
Util-linux          	2.25.2
Mount               	2.25.2
Module-init-tools   	18
E2fsprogs           	1.42.12
Jfsutils            	1.1.15
Reiserfsprogs       	3.6.24
Reiser4fsprogs      	1.0.9
Xfsprogs            	3.2.1
Pcmciautils         	018
Linux C Library     	2.19
Dynamic linker (ldd)	2.19
Linux C++ Library   	6.0.20
Procps              	3.3.9
Net-tools           	1.60
Kbd                 	1.15.5
Console-tools       	1.15.5
Sh-utils            	8.23
Udev                	215
Wireless-tools      	30
Modules Loaded      	ablk_helper aesni_intel aes_x86_64 af_alg ahci apple_bl apple_gmux applesmc arc4 b43 bcm5974 bcma binfmt_misc bitblit bluetooth bnep btbcm btintel btrtl btusb ccm cfg80211 coretemp crc32c_intel crc_itu_t cryptd dm_crypt drm drm_kms_helper fat fbcon fb_sys_fops firewire_core firewire_ohci firewire_sbp2 fuse ghash_clmulni_intel glue_helper hid hid_apple hid_generic i2c_algo_bit i2c_i801 i2c_smbus i915 input_leds input_polldev intel_gtt irqbypass iTCO_vendor_support iTCO_wdt kvm kvm_intel led_class libahci lp lpc_ich lrw mac80211 nls_cp437 nls_iso8859_1 parport ppdev pps_core ptp sdhci sdhci_pci shpchp snd snd_hda_codec snd_hda_codec_cirrus snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_core snd_hda_intel snd_hwdep snd_mixer_oss snd_pcm snd_pcm_oss snd_pcsp snd_timer softcursor soundcore ssb syscopyarea sysfillrect sysimgblt tg3 thunderbolt tileblit tpm tpm_tis tpm_tis_core usbhid uvcvideo vfat video videobuf2_core videobuf2_memops videobuf2_v4l2 videobuf2_vmalloc videodev x86_pkg_temp_thermal xhci_hcd xhci_pci