How can you completely remove a package?

Question

I am trying to do a clean install of the octave3.2 package.

To do this, I removed it, then tried to reinstall it.

When I reinstalled, an error occurred. It could be a bug in the package, but I want to make sure I have everything removed so that I can do a clean install.

Is it enough to do this?

sudo apt-get --purge remove octave3.2

Answer 1

This is a very general answer to the question about the effects of purging packages. For advice specific to your situation, you'll have to edit your question to include additional information--in particular, the complete and exact text of the error message you are getting.

Removing packages with sudo apt purge ... or sudo apt --purge remove ... will remove them and all their global (i.e., systemwide) configuration files. This is usually what people mean when they talk about completely removing a package.

But that doesn't mean your system is the same as it was before the package was installed. In particular:

• This does not remove packages that were installed as dependencies, when you installed the package you're now removing. Assuming those packages aren't dependencies of any other packages, and that you haven't marked them as manually installed, you can remove the dependencies with sudo apt autoremove or (if you want to delete their systemwide configuration files too) sudo apt --purge autoremove.

• This does not remove non-systemwide configuration files. Specifically, it does not remove user-specific configuration:

  • It does not remove the configuration files and directories located in users' home directories (or in the .config subdirectory of their home directories), created by the software the package provides.

    • If these files/folders are not stored in .config, they usually start with a . themselves. Either way, you can see them with ls by using the -a or -A flag, and you can see them in Nautilus and most other file browsers/managers by pressing Ctrl+H or going to View > Show Hidden Files.

  • It does not reverse changes made to existing user-specific configuration files.

  • It does not remove new gconf or dconf keys, or reverse any gconf or dconf configuration changes.

• Using purge or --purge remove instead of remove does not reverse changes to existing systemwide configuration files provided by other packages or created manually by the user. However, sometimes such changes are undone by uninstalling the package (whether or not it's a purge rather than a remove).

Answer 2

Use the command:

sudo apt-get purge --auto-remove packagename

It will purge required packages along with dependencies that are installed with those packages. The --auto-remove option works similar to sudo apt-get autoremove.

Answer 3

You first check out for the name of the package you want to remove:

dpkg --list

Then remove the given package

sudo apt-get remove package_name

Purge any related code

sudo apt-get purge package_name

Then Autoremove

sudo apt-get autoremove

Finally, do a clean so you check everything is correctly removed

sudo apt-get clean

You would like to check at the packages list whether the one you wanted to remove is not listed anymore, but it is optional.

Have a nice day,

Answer 4

Remove a deb package

Get the package complete name:

dpkg --list | grep partial_package_name*

Remove the package:

sudo apt-get remove package_name

Remove all the dependencies:

sudo apt-get purge package_name

Remove the unneeded packages that were once installed as a dependency:

sudo apt-get autoremove

Remove the retrieved packages from the local cache:

sudo apt-get autoclean

Check that it was completely removed:

dpkg --list | grep partial_package_name*

Remove a Snap package

Using remove command:

sudo snap remove package_name

sudo snap remove package_name

Answer 5

Better keep track of extra dependency packages installed while you are installing one.

The following extra packages will be installed: 
    libgssglue1 libnfsidmap2 libtirpc1 nfs-common rpcbind

If you remove original package only, the dependency package may remain.

So you have to manually remove each one using

apt-get purge package_name

Answer 6

Instead of removing auto-installed dependent packages manually, use the following instead:

 zanfilip@zanfilip-VPCEB3L0E:~/jp/eclipse$ sudo apt-get --purge autoremove
    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    The following packages will be REMOVED
      libupstart1* linux-headers-3.16.0-30* linux-headers-3.16.0-30-generic*
      linux-image-3.16.0-30-generic* linux-image-extra-3.16.0-30-generic*
    0 to upgrade, 0 to newly install, 5 to remove and 23 not to upgrade.
    After this operation, 279 MB disk space will be freed.
    Do you want to continue? [Y/n] 

Answer 7

If you want to remove some secific packages you can use these commands:

dpkg --get-selections | grep PACKAGE_NAME | awk '{ print $1}'| xargs apt-get -y --purge autoremove

don't forget the "-y" switch because otherwise apt-get would keep asking about removing the individual packages and won't remove anything.

Answer 8

Another option you have, is using the debfoster package. This will interactively find and suggest packages for removal (and purge) along with dependant packages.

sudo apt install debfoster
sudo debfoster
# and optionally remove debfoster too
sudo purge debfoster

Answer 9

If you're using snap you can remove a package using:

$ sudo snap remove <package>

Application code, its run time dependencies and associated user data are all cleaned up. If your snap declared a service, they will as well be shut down and removed.

Answer 10

Before uninstalling the software package, you must first find the exact package name. To get a list of all installed packages on your system type:

sudo apt list --installed

To remove an installed package, run the following command:

sudo apt remove package_name