i did apt-get update it works fine but ......
root@venkat:~# apt-get dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
metasploit-framework
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 58.4 MB of archives.
After this operation, 20.0 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Err http://http.kali.org/kali/ sana/main metasploit-framework amd64 4.11.5-2015121501-0kali1~r1u1
404 Not Found
E: Failed to fetch http://http.kali.org/kali/pool/main/...r1u1_amd64.deb 404 Not Found

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?