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walterwoj@Walter-Server:~$ sudo apt-get upgrade ddclient

Reading package lists... Done

Building dependency tree      

Reading state information... Done

The following packages will be upgraded:

  ddclient

1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Need to get 64.6 kB of archives.

After this operation, 1,024 B disk space will be freed.

Do you want to continue [Y/n]? y

Get:1 http://ppa.launchpad.net/ian-hawdon/ddclient/ubuntu/ precise/main ddclient i386 3.8.1-1ubuntu1opezy1 [64.6 kB]

Fetched 64.6 kB in 1s (61.8 kB/s)  

Preconfiguring packages ...

(Reading database ... 169331 files and directories currently installed.)

Preparing to replace ddclient 3.8.0-11.4ubuntu1 (using .../ddclient_3.8.1-1ubuntu1opezy1_i386.deb) ...

Unpacking replacement ddclient ...

Processing triggers for man-db ...

Processing triggers for ureadahead ...

ureadahead will be reprofiled on next reboot

Setting up ddclient (3.8.1-1ubuntu1opezy1) ...

FATAL:    Error loading the Perl module Digest::SHA1 needed for freedns update.

FATAL:     On Debian, the package libdigest-sha1-perl must be installed.