When attempting to install a new package or update an existing package if you are presented with the error
E: Release file expired, ignoring http://archive.debian.org/debian-archive/debian/dists/squeeze-lts/Release (invalid since 189d 0h 42min 32s)
You will need to execute the following command as root:
$ echo 'Acquire::Check-Valid-Until "false";' > /etc/apt/apt.conf.d/90ignore-release-date
And then perform…
or if you are using aptitude…
You may need to execute the above command twice to make sure everything is up to date.
ssh-keygen -q -f ~/.ssh/id_rsa -t rsa
Enter passphrase (empty for no passphrase): …
Enter same passphrase again: … Key Distribution
# first, upload public key from client to server
scp ~/.ssh/id_rsa.pub firstname.lastname@example.org: # next, setup the public key on server
cat ~/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 600 ~/.ssh/authorized_keys
Breaks down structure of matter into atoms and, by use of conventional symbols, shows the action of electrons within an atom. The principles involved in the flow of current are explained and a volt, ampere and Ohm are defined.
Basic Ocilliscope Tutorial
Definately the best tutorial on the basic control and use of a dual channel ocilliscope.