The output of your command "cat -n /etc/os-release /etc/networks" is:

     1	PRETTY_NAME="Ubuntu 22.04.4 LTS"
     2	NAME="Ubuntu"
     3	VERSION_ID="22.04"
     4	VERSION="22.04.4 LTS (Jammy Jellyfish)"
     5	VERSION_CODENAME=jammy
     6	ID=ubuntu
     7	ID_LIKE=debian
     8	HOME_URL="https://www.ubuntu.com/"
     9	SUPPORT_URL="https://help.ubuntu.com/"
    10	BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
    11	PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
    12	UBUNTU_CODENAME=jammy
    13	# symbolic names for networks, see networks(5) for more information
    14	link-local 169.254.0.0