Adding an additional IP to a network interface on Debian 7.
Business as usual, but in this case I got the following error message when trying to "ifup" the alias:
[SOLUTION]Not enough information: "dev" argument is required.
Failed to bring up eth1:0.
I had a comment next to an address line.
This doesn't work anymore. The comment had to be removed in order to work.
See Debian Bug #673043: "new ifupdown does not understand comments in interfaces, breaking existing setups" for details.