Misc. Ubuntu commands.
Remove Pre-installed
If you don't know what they are …
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apt purge cloud-* snapd whoopsie* unattended-upgrades ubuntu-advantage-tools
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If not using LVM, LXC/LXD
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apt purge lvm2 lxd lxcfs
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If completely rely on journald.
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apt purge rsyslog libestr0 libfastjson4
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Get Version
Change Timezone
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dpkg-reconfigure tzdata
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Check Upstream DNS
Ubuntu/Systemd use systemd-resolver for dns lookup and /etc/resolve.conf no longer show the actual upstream dns. Use following to check.
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systemd-resolve --status
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