我建議在更新軟件和系統內核時。只從backtrack官方提供的軟件資料庫中獲取，因為官方庫中的軟件都是在backtrack系統中測試過的。
0×01 更新應用程序
在成功安裝和配置backtrack系統後，第壹件要做的事情就是更新backtrack系統自身。backtrack5是基於ubuntu系統 因此可以使用ubuntu/debian系統的命令
apt-get
來進行更新。
apt-get命令會從/etc/apt/sources.list文件中獲取更新所使用的服務器，因此請確保sources文件中的內容是正確的。
Backtrack5中默認的sources.list文件中的內容如下：
deb plete penetration testing environment than ever before. We will start a series of blog posts on how to upgrade, deal with VMWare, and even build your own updated BT5 R2 by yourself. For now though, here’s how to get the new kernel and all of the updated goodness:
1. Update and upgrade your BT5 (R1) installation:
apt-get update
apt-get dist-upgrade
apt-get install beef
reboot
Once that’s done, you should already have the new kernel installed as well as any last updates we have for the official R2 release. You need to reboot to have the 3.2.6 kernel kick in.
2. OPTIONAL – Once rebooted, log back in, and get your pretty splash screen back.
fix-splash
reboot
On the next reboot, you should see the red console splash screen appear.
3. Verify that you are running a 3.2.6 kernel:
uname -a
You should see something like “Linux bt 3.2.6 …”
4. Feel free to install any or all of the new tools featured in BackTrack 5 R2:
apt-get install pipal findmyhash metasploit joomscan hashcat-gui golismero easy-creds pyrit sqlsus vega libhijack tlssled hash-identifier wol-e dirb reaver wce sslyze magictree nipper-ng rec-studio hotpatch xspy arduino rebind horst watobo patator thc-ssl-dos redfang findmyhash killerbee goofile bt-audit bluelog extundelete se-toolkit casefile sucrack dpscan dnschef
5. Add the new security updates repository to /etc/apt/sources.list, and run another upgrade.
echo “deb prehensive introduction to BT5 R2, on the day of the Official release – March 1st! The BackTrack 5 R2 ISOS will we available for download from our site on May 1st via Torrent only. HTTP links will be added a few days later.