If you need a hands-off way to update your Ubuntu or Debian servers, Chef’s Knife utility provides an easy way to do this (and parallelize it!).
The following will update your packages in an unattended way. In other words, all prompts will be suppressed, and defaults will be accepted (e.g. if a new file is delivered with a package, yours will be kept). You can look at the dpkg –force-conf* flags to change this behavior. The -C flag denotes the number of parallel processes.
If you don’t want to update all of your servers, update the search command to be more precise.
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knife ssh 'platform:ubuntu or platform:debian' 'DEBIAN_FRONTEND=noninteractive APT_LISTCHANGES_FRONTEND=none apt-get -y -o Dpkg::Options::=--force-confdef dist-upgrade' -p 22 -x root -P password -C 4 |
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