Linode machine hacked? (Ubuntu)

Hey guys, today when I logged in my linode machine it felt a bit slow so I ran ps aux and found some stuff running which I don't recall installing and I wanted to know if they come with the default ubuntu linode installation or maybe someone has hacked my linode.

Below is the ps aux response.

http://pastebin.com/U5EFrN5h

Some of the stuff I don't recognize:

/sbin/getty -8 38400 hvc0

/usr/sbin/ntpd -p /var/run/ntpd.pid -g -u 102:104

udevd –daemon

rsyslogd -c4

dhclient3 -e IF_METRIC=100 -pf /var/run/dhclient.eth0.pid -lf

upstart-udev-bridge --daemon

Thanks