RN316 - reverse on apt-get update(how)

:~# apt-get install rsync
Reading package lists... Done
Building dependency tree
Reading state information... Done
rsync is already the newest version (3.1.3-1.netgear1).
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
linux-image-extra : Depends: linux-image (= 4.4.218-610070001) but 4.4.218-6100 80001 is to be installed
mysql-server-core-5.5 : Depends: libaio1 (>= 0.3.93) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

--rsync is just an example--

it seems that my last-time using ssh (should be "apt-get update") cause this problem.

i know i shouldn't do it but just forget at that moment.

can you guys tell me how to reverse/undo those packages?or i have to reinstall?