Ik kwam toevallig op de site ubuntulinuxhowto.blogspot.com waar werd beschreven hoe je no-ip.com client kunt installeren op Ubuntu.
Het onderstaande commando installeerd de client.
apt-get install no-ip
Om de client te configureren voer je het onderstaande commando uit:
no-ip -C
Auto configuration for Linux client of no-ip.com.
Multiple network devices have been detected.
Please select the Internet interface from this list.
By typing the number associated with it.
0 eth0
Please enter the login/email string for no-ip.com afokkema@ictfreak.nl
Please enter the password for user ‘afokkema@ictfreak.nl’ ************
Only one host [fokkema.no-ip.com] is registered to this account.
It will be used.
Please enter an update interval:[30] 30
Do you wish to run something at successful update?[N] (y/N) N
New configuration file ‘/etc/no-ip.conf’ created.
ICT-Freak.nl 
Very clear and useful instructions.
I’ve solved my problem. Thank you very much.