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From an older query I found that sudo apt-get autoremove should be used. I did that and some packages got removed.

But the applications Computer Janitor and Pitivi are still present on the computer (these are not supposed to be in 11.10 from what I read), which made me wonder whether there are other unnecessary packages or old apps still present.

Is there any way to clear up these applications and packages?

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Try Ubuntu Tweak.I Hope this solves your problem. – 2ndGenCore_i5 Sep 23 '14 at 18:33

The packages that were meant to be removed where removed. However, some applications were left because users may actually use them or need them. GIMP, for example, was replaced with Pitivi some time ago, but that doesn’t mean I should have to reinstall it every time I upgrade.

In other words, the fact that a package is no longer in the default selection of Ubuntu apps is no reason to automatically remove it on upgrade.

You can also remove apps by hand. This may be especially needed for Computer Janitor, because it may delete something that is actually necessary. Handle it with care if you keep it.

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Thanks for the reply. Yes. That's why I didn't use computer janitor. My doubt was whether Ubuntu had left packages that were not upgraded but are also not necessary, that are possibly unused. I wanted to know how I could determine if these were present and how to remove them. – Nithin V. Raman Oct 16 '11 at 8:54

From man apt-get:

autoremove is used to remove packages that were automatically installed to satisfy dependencies for some package and that are no more needed.

If you want to remove those unwanted apps you should use apt-get remove <appname> (or apt-get purge <appname> to remove also app's config files). Then you can run apt-get autoremove to get rid of their dependencies.

Be sure to check if apt-get isn't going to remove some really useful apps/dependencies before agreeing to proceed with uninstall process.

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Thanks for the reply. I understand. I can do this for the applications I know about such as Pitivi. But I don't know if there are other packages which are redundant\ not in use. Are these removed automatically or left behind. If they are left behind, how do I find out about them? – Nithin V. Raman Oct 16 '11 at 7:43
I don't know if there is any automatic way to search for unused apps. AFAIK there isn't, so the easiest way is to check in Ubuntu Software Center, in "Installed" section for apps you know you don't use. But remember: NEVER remove anything you're not sure about, better google for it first. There are many apps you may not (or even shouldn't) use, but are required for your system. – conv Oct 16 '11 at 20:56

You may have to do this manually. The best way to do so is via the Ubuntu Software Center under the "Installed" tab and removing the apps you don't want. You can also try installing BleachBit, which is a GUI for removing unwanted files and repositories. It has the option to clean up APTs but I never tries it myself. Maybe that may help. Try it and let me know.

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