cat /etc/debian_version
    10.7
cat /etc/issue
    Debian GNU/Linux 10
lsb_release -a
    No LSB modules are available.
    Distributor ID: Debian
    Description:    Debian GNU/Linux 10 (buster)
    Release:        10
    Codename:       buster
cat /etc/os-release
    PRETTY_NAME="Debian GNU/Linux 10 (buster)"
    NAME="Debian GNU/Linux"
    VERSION_ID="10"
    VERSION="10 (buster)"
    VERSION_CODENAME=buster
    ID=debian
    HOME_URL="https://www.debian.org/"
    SUPPORT_URL="https://www.debian.org/support"
    BUG_REPORT_URL="https://bugs.debian.org/"
hostnamectl
   Static hostname: v22018061954267647
         Icon name: computer-vm
           Chassis: vm
        Machine ID: [..]
           Boot ID: [..]
    Virtualization: kvm
  Operating System: Debian GNU/Linux 10 (buster)
            Kernel: Linux 4.19.0-13-amd64
      Architecture: x86-64

Note: apt-get install lsb-release

Update / Upgrade#

To update current version see Apt.
To upgrade to a new Linux version, you need to change the source for packages and run an update like before.

vi /etc/apt/sources.list
    deb http://ftp.debian.org/debian/ buster main

Note: check additional sources specified wihtin folder sources.list.d

}}}