Update repositories and all centos packages

[fefe75]

I am trying to update a docker image. To do this I ran this command:

Code: Select all

RUN apt update && apt upgrade -y

Unfortunately the command gives errors because the image was not created with a Debian or Ubuntu system but with a different OS, perhaps Centos.
With a system like Centos, how do you update the packages and all the system modules? Can you also clean up the system to prevent the used space from growing excessively?
The image I'm manipulating is this:
https://hub.docker.com/layers/pgadmin4/ ... xt=explore
Unfortunately I can't find the OS on which the image is built written.
I've also tried these codes but they don't work.

Code: Select all

RUN yum -y update
RUN yum clean all

[TrevorH]

If you have apt installed then you almost certainly don't have CentOS. If you don't have yum then you definitely don't have CentOS.

Do you have an /etc/os-release and if so, what does it contain?