Best performance UNIX just for HOST Virtualization? Post: 303012049

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Top Forums UNIX for Beginners Questions & Answers Best performance UNIX just for HOST Virtualization? Post 303012049 by mbzadegan on Sunday 28th of January 2018 11:48:26 PM

01-29-2018

Registered User

Quote:

Originally Posted by Neo

My experience is that major Linux updates to PHP and Apache2 can and do break things.

It has to break things in many circumstances because, for example, the Apache2 configuration file for the latest version of Apache2 / PHP7 does not work with PHP 5.X versions, of PHP/Apache2, etc.

So, Apache2 will break during some major upgrades and so will PHP code.

Also, PHP code which is DEPRECATED in PHP7 will break when upgrading to PHP7.

You must be very careful upgrading if you do not want a lot of unexpected downtime; and if you are just doing the upgrade on personal server, that might be OK; but if you are upgrading a production server, one odd config file change or incompatibility can ruin your day for sure.

What is related to the virtualization subject? Smilie

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systemd-detect-virt

SYSTEMD-DETECT-VIRT(1)						systemd-detect-virt					    SYSTEMD-DETECT-VIRT(1)

NAME

       systemd-detect-virt - Detect execution in a virtualized environment

SYNOPSIS

       systemd-detect-virt [OPTIONS...]

DESCRIPTION

       systemd-detect-virt detects execution in a virtualized environment. It identifies the virtualization technology and can distinguish full VM
       virtualization from container virtualization.

       When executed without --quiet will print a short identifier for the detected virtualization technology. The following technologies are
       currently identified: qemu, kvm, vmware, microsoft, oracle, xen, bochs, chroot, uml, openvz, lxc, lxc-libvirt, systemd-nspawn.

       If multiple virtualization solutions are used, only the "innermost" is detected and identified. That means if both VM virtualization and
       container virtualization are used in conjunction, only the latter will be identified (unless --vm is passed).

OPTIONS

       The following options are understood:

       -h, --help
	   Prints a short help text and exits.

       --version
	   Prints a short version string and exits.

       -c, --container
	   Only detects container virtualization (i.e. shared kernel virtualization).

       -v, --vm
	   Only detects VM virtualization (i.e. full hardware virtualization).

       -q, --quiet
	   Suppress output of the virtualization technology identifier.

EXIT STATUS

       If a virtualization technology is detected, 0 is returned, a non-zero code otherwise.

SEE ALSO

       systemd(1)

systemd 208														    SYSTEMD-DETECT-VIRT(1)