By default, Ubuntu uses nano for editing visudo.

Nano is the linux editor for Windows administrator . . . don't use it!

To change it to something else, such as vim:

sudo update-alternatives --config editor
There are 4 choices for the alternative editor (providing /usr/bin/editor).

  Selection    Path …

While never a good idea to enable this in a production, or multi-user system, on a lab system, not needing to type in a password when running sudo makes life a lot easier.

• To enable password-less sudo:

  sudo visudo
  

• Add this to the bottom of the file, assuming your username is tom:

  tom ALL=(ALL) NOPASSWD: ALL
  

• If we …

I was trying to make a backup, but exclude my working directory, which just has a lot of temp files in it.

. . . easier said than done . . .

The concept is pretty easy, simply use the --exclude="file2exclude" switch option in the command, and the file(s)/directory(ies) listed will be excluded.

It didn't work. …

Virtual machines (VM) and their KVM host can't communicate over the network, which is by design.

There are times however, that I want to enable VM to KVM host communication, typically because the KVM host is hosting something else I want to access from the VM..

The two ways of doing this, along with the pros and cons: …

When away from home, it's always nice to be able to access devices, servers, services, on my home network.

In addition to accessing my home network's resources, if I route all of my traffic through my home network, I get the added benifit of avoiding insecure wireless networks.

There have been more than a few …

I created an Ubuntu desktop virtual machine (VM) on my KVM system, and shortly after I started using it, I realized that I hadn't allocated/created a large enough hard drive for my use.

I have a "master" Ubuntu VM that I clone when I need an Ubuntu VM, which is set up and configured they way I like it.

I had …