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Detect whether the server is virtual or a container

harmlessSystem and hardwaredebian, ubuntu
user@server
systemd-detect-virt

Prints a single word: none on real hardware, otherwise the detected technology such as kvm, vmware, microsoft (Hyper-V), xen, openvz or lxc. Important for judging whether SMART values, sensors or custom kernel modules are available at all.

Note: -c checks only for containers, -v only for virtual machines.

Also searched as

  • is this a vps or dedicated server
  • is the server running in a vm
  • which hypervisor am i on

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Show all PHP-FPM services and their status

$systemctl list-units --type=service --all 'php*-fpm*' 'plesk-php*-fpm*'
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Show journal logs for a single service

#journalctl -u nginx -n 200 --no-pager
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Show logs from the previous boot

#journalctl -b -1 -n 200 --no-pager
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Show only error messages in the system journal

#journalctl -p err -b --no-pager
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Show system logs since a specific time

#journalctl --since "1 hour ago" --no-pager
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Change swappiness at runtime

#sysctl vm.swappiness=10
cautionSystem and hardware

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