ubuntu 18.04+ not checking /etc/hosts why does etc hosts updates no longer work? How to update /etc/hosts

Question

Why does updating /etc/hosts no longer work?

How can I debug and get it to work?

cat /etc/hosts:

127.0.0.1   localhost
::1     localhost

# I added this line
127.0.0.1   kakfa

cat /etc/nsswitch.conf:

hosts:          files mdns4_minimal [NOTFOUND=return] dns
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis

cat /etc/resolv.conf:

nameserver 127.0.0.53
options edns0 trust-ad
search lan

systemd-resolve --status:

Global
       Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
resolv.conf mode: stub

Link 2 (enp3s0)
Current Scopes: none
     Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported

Link 3 (wlp0s20f3)
    Current Scopes: DNS
         Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Current DNS Server: 192.168.1.1
       DNS Servers: 192.168.1.1
        DNS Domain: lan

related:

• /etc/hosts not working
• local DNS lookup not working, despite everything is in /etc/hosts
• https://manpages.ubuntu.com/manpages/jammy/man5/resolvconf.conf.5.html
• https://manpages.ubuntu.com/manpages/jammy/man5/NetworkManager.conf.5.html

Answer 1

I put two lines for 127.0.0.1

It should have been

127.0.0.1   localhost     kakfa
::1     localhost