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minpkg [2010/10/23 22:00] (versione attuale)
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 +{{:minpkg:minpkg.py-1.0.tar.gz|Click here to download version 1.0 of minpkg}}
  
 +===== What is this? =====
 +
 +minpkg.py is a simple script which gives you a list of the packages you installed in your Debian/Ubuntu system. More precisely, it gives you a list of packages that were //explicitely// installed (not installed automatically as dependencies).
 +
 +It does so by:
 +  - extracting the list of all installed packages (thanks to python-apt)
 +  - removing from this list packages which were installed automatically (by looking at file // /var/lib/apt/extended_states // )
 +  - printing the result
 +
 +===== What can I do with it? =====
 +
 +Assume you must move to a new system, or you just messed up your installation and want to restart from scratch, with all the packages you currently have.
 +
 +You may get the full list of installed packages with "dpkg --get-selections | grep -v deinstall" and reinstall those on the new system, but assume you installed package **a** depending on package **b**, and assume that later on, a new version of **a** on your new system replaces dependence on **b** with a dependence on new package **c**: then by upgrading you will indeed install **c**, but **b**, though unused, won't be removed by command "apt-get autoremove".
 +
 +Moreover, if the new system runs a newer release, package **b** may have been already replaced, so your restore would fail because it wouldn't find it.
 +
 +Using minpkg is as simple as:
 +
 +(on the old system)
 +  ./minpkg.py > installs_list
 +
 +(on the new system)
 +  sudo apt-get install `cat installs_list`
minpkg.txt · Ultima modifica: 2010/10/23 22:00 (modifica esterna)