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Old 07-23-2007, 03:04 PM   #1
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Question Kubuntu, simultaneous upgrade and migration to new machine

This is probably a faq; it's my first question here though, so please bear with me...

I've got kubuntu 6.06 installed on one PC, and am planning to install kubuntu 7.04 on a second machine. What I'd like to do is create a list of all installed applications on the first machine, copy the list to the second machine after installing kubuntu 7.04, and have the remaining applications installed. I'm planning to do a network install. I've mainly used synaptic for installing programs, occationaly the default installer that comes with kubuntu, as well as apt-get.

Is there a fast and easy way to do this? If so, I'd be very grateful for information.

Thanks in advance,
Old 07-24-2007, 07:54 AM   #2
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I believe it could be possible to create a list of installed packages (without versions or such, just the names), copy that to the other machine and feed it to aptitude/apt-get that would go trough it. What I'm not certain is if it causes trouble, but probably not. Use interactive mode so you can see what is being done before proceeding.

I'm sorry I can't provide direct commands for you, but apt-something (apt-cache?) can probably create such a list for you. Querying all installed packages should be no problem, I think it's pretty basic functionality in package managers. After you've got the list, see how it looks like; if there are version numbers etc. in the package names, you must get rid of them. sed and/or awk are great tools for that, unless you want to go trough the list manually (the list will be long). After that the list should only contain the names of the installed software. Again I'm not sure if aptitude or apt-get have the ability to read the packages-to-be-installed list from a file, but if it's not possible, you can still feed all the entries (package names) from the list to aptitude/apt-get to get the same effect.

In my opinion it still might be easier to just do a basic install and after it manually add the programs you use. I mean you probably don't have that much extra packages that you couldn't pretty quickly either write them up or just remember them and tell aptitude or apt-get get them. Creating the list mentioned above would include all the packages that were installed already in the new system, making the list very long for no good reason.
Old 07-24-2007, 08:48 PM   #3
Registered: Dec 2006
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#dpkg-query -l

will list all packages installed. You might want to pipe it into less, since it will probably be quite long. that is:

#dpkg-query -l | less

/var/lib/dpkg/status also contains a list of packages with descriptions.
Old 07-25-2007, 03:52 PM   #4
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Smile Solved.

Thanks a lot, b0uncer and zlya. I found that the easiest way to proceed was comparing the output of dpkg-query -l on the two machines, to make a list of the packages I had installed, and then installing them manually with synaptic.


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