I have just bought a ubiquity routerstation pro, with kamikaze, and i dont know which version of kamikaze do i have. I search the wiki and i found that in /etc/banner (startup screen) is

root@Daemon:/proc# cat /etc/banner
  _______                     ________        __
|       |.-----.-----.-----.|  |  |  |.----.|  |_
|   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
|_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
KAMIKAZE (bleeding edge, r15349) -------------------
  * 10 oz Vodka       Shake well with ice and strain
  * 10 oz Triple sec  mixture into 10 shot glasses.
  * 10 oz lime juice  Salute!
---------------------------------------------------
root@Daemon:/proc# busybox 2>&1|grep -i ^busybox
BusyBox v1.11.3 (2009-05-08 03:07:05 PDT) multi-call binary

. So, which version of kamikaze do i have? I want this because i want to put in /etc/opkg.conf the src and i dont know which lines i have to add. Now i have

#src/gz snapshots http://downloads.openwrt.org/snapshots/ar71xx/packages

src kamikaze http://downloads.openwrt.org/kamikaze
#src packages http://downloads.openwrt.org/kamikaze/

dest root /
dest ram /tmp
lists_dir ext /var/opkg-lists
option overlay_root /jffs

but it fails to download. I go to this webpage and i get the /index_of_kamikaze, where i must choose the version and after that there is another list of owrt version which i don't know. Please help!

I used

src/gz snapshots http://downloads.openwrt.org/snapshots/ … /packages/

dest root /
dest ram /tmp
lists_dir ext /var/opkg-lists
option overlay_root /jffs

and it worked. Please someone to confirm my solution before upgrade the whole system?

It's easy to miss, just the revision number is listed there, not a release number.  Your version is many months out of date, you may want to reflash using one of the more recent snapshot images: http://downloads.openwrt.org/snapshots/trunk/ar71xx/

There are some other threads on flashing this unit, search the forums that you'll find those.