I downloaded vim-youcompleteme from the software center in Ubuntu. But I don't know how to make it work. When I restarted vim and tested, nothing special occurred. And vim-syntastic is the same. Could someone tell me how to make them work? Should I do something with my ~/.vimrc ? Thanks in advance!
From the package-specific README (/usr/share/doc/vim-youcompleteme/README.Debian):
vim-youcompleteme
-----------------
A code completion plugin for Vim. This package designed to work with
vim-addon-manager. To use this addon install vim-addon-manager package first
and use this command:
$ vam install youcompleteme
vim-addon-manager is recommended by when vim-youcompleteme, so there's a good chance it is already installed. If not:
sudo apt-get install vim-addon-manager
And then run the command given in the README. vim-syntastic is only available for 14.10, from the results in the package index, but given that it explicitly depends on vim-addon-manager, I'd say something similar applies to it as well.
