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System Config

Debian & Ubuntu style

APT / dpkg

get installed packages:

dpkg --get-selections > dpkgselections

set & install packages from file:

dpkg --set-selections < dpkgselections

dselect update   # fixes packages not found in db errors
apt-get -u dselect-upgrade

# or:
aptitude install

date

date --set 1998-11-02 
date --set 21:08:0

dpkg-reconfigure tzdata

apt-get install locales
dpkg-reconfigure locales
locale

If you still get “unable to set locale, falling back to the default locale”, try this:

export LANGUAGE=en_US.UTF-8
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8
locale-gen en_US.UTF-8