I tried to add a another machine mapping to an alias in the hosts file. After which I am unable to connect to anything. How do I fix this?
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Try replacing your hosts file with this, and changing the hostname and FQDN:
127.0.1.1 hostname hostname.yourdomain.com
127.0.0.1 localhost
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
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