I have installed Ubuntu 12.04 on Amazon EC2. Sometimes after connecting with the instance I get the following
How can I find which packages can be updated? Can I choose if don't wish to update some packages?
You can see what updates are available by typing as
And if you don't want any package to update, then you can lock that package.
For more information, check how to pin packages.
To do a simulated update:
You can hold any certain package, this will keep it at the same version no matter what.
You can then remove the hold with
Hope that helps.