I have a list of packages and I want to know which packages are not available in the ubuntu repositories.
I type this command but it returns nothing :
$ apt-cache show vim TotO perl 2>&1 | grep "Unable to locate package"
$
It occurs in both Ubuntu 16.04 LTS and 18.04 LTS.
Can you help ?
Other SE posts, for example this, show how you can install a specific package version. However, I'm unsure what exactly the naming convention / syntax used for the version I want is.
I need to install rdiff-backup version 1.2.8, but I'm unclear from looking through github (I'm a noob) what the full package version would be called. Edit: I should note that I did try the syntax of,
sudo apt-get install rdiff-backup=1.2.8
as well as
sudo apt-get install rdiff-backup=1.2.8-1ubuntu1 \
(the latter just blindly copying the syntax shown in the linked example, in the off chance it worked.)
And as the title states, the commands I've looked up that people say should list all or old versions of packages don't seem to work as intended (or as I understand them).
Thanks for your time.
Can't find any formal explanation to determine whether apt-cache policy <package_name> command requires sudo or not.
Tested it in my machine (Ubuntu) with lots of packages and seems to work, but I'd like to know if there's an scenario where this does not work.
I'm trying to learn how to quickly change which java version my system uses as described in this article: https://aboullaite.me/switching-between-java-versions-on-ubuntu-linux/ I've used apt-get install openjdk-8-jdk, and when I run sudo update-alternatives --config java it looks like this:
There are 2 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
------------------------------------------------------------
0 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1101 auto mode
1 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1101 manual mode
* 2 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 manual mode
I'm trying to create a script that will switch between versions, like in the article. (this is the script from the article:
sudo update-java-alternatives -s java-8-oracle
export JAVA_HOME=/usr/lib/jvm/java-8-oracle/
export PATH=$PATH:$JAVA_HOME
but when I try it, this happens:
sudo update-java-alternatives -s java-8-openjdk-amd64
update-java-alternatives: file does not exist: /usr/lib/jvm/.java-8-openjdk-amd64.jinfo
How can I update-java-alternatives without an error? Should I just skip that line?
I want to find a list of all packages with the Priority: field set to Required. These are packages that are normally installed on every system, however I've recently discovered that they aren't necessarily installed for foreign architectures using multiarch. What's the best way to find these packages?