Don Nguyen Ngoc ngocdon0127

Protecting a Proxmox VM from the OOM Killer

VMs tend to occupy a lot of memory, but they are normally also the official denizens of a server. So if memory gets tight we rather have the oom killer kill the new kid on the block (some process which has suddenly started using more ram) instead of the regular VM crowd.

Obviously bad things will happen if the oom killer is not able to free enough memory to make your machine happy again, but with this you at least have some control over who gets killed.

The Hookscript Method

Using `dd`

RunAbove Sandbox [ra]

1 core / 2 GB RAM / 20 GB SSD

EC2 Micro [ec]

1 core / 1 GB RAM / 8 GB

Digital Ocean [do]

1 core / 512 MB RAM / 20 GB SSD

Intall VNC Server and Client on CentOS 6.8

Links

https://wiki.centos.org/HowTos/VNC-Server https://www.server-world.info/en/note?os=CentOS_6&p=x&f=2

install vnc-server (tigervnc-server on cenOS 6.8.)

[root@apaternina nfs]# yum groupinstall Desktop
[root@apaternina nfs]# yum install gnome-core xfce4 firefox

Here are several different ways to test a TCP port without telnet.

BASH (man page)

$ cat < /dev/tcp/127.0.0.1/22
SSH-2.0-OpenSSH_5.3
^C

$ cat &lt; /dev/tcp/127.0.0.1/23

	$(window).off('blur')

	$(window).blur(function () {
	var count = $.cookie("lost_focus_count_" + UserTest);

	if (!count \|\| isNaN(count)) count = 0;
	count++;
	TestCertificate.Common.showMessenger(TestCertificate.Common.getResource("LOST_FOCUS", count));

	$.ajax({

	### Install:
	wget -qO - https://download.sublimetext.com/sublimehq-pub.gpg \| sudo apt-key add -
	echo "deb https://download.sublimetext.com/ apt/stable/" \| sudo tee /etc/apt/sources.list.d/sublime-text.list
	sudo apt-get update
	sudo apt-get install sublime-text

	### Config:
	{
	"bold_folder_labels": true,
	"charset": "utf-8",

	/*
	* Taken from http://stackoverflow.com/questions/5867534/how-to-save-canvas-data-to-file/5971674#5971674
	*/

	var fs = require('fs');
	// string generated by canvas.toDataURL()
	var img = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0"
	+ "NAAAAKElEQVQ4jWNgYGD4Twzu6FhFFGYYNXDUwGFpIAk2E4dHDRw1cDgaCAASFOffhEIO"
	+ "3gAAAABJRU5ErkJggg==";
	// strip off the data: url prefix to get just the base64-encoded bytes


	var mongoose = require('mongoose');
	var Schema = mongoose.Schema;
	var assert = require('assert')

	console.log('\n===========');
	console.log(' mongoose version: %s', mongoose.version);
	console.log('========\n\n');

	var dbname = 'testing_geojsonPoint';

	I use the first


	—– BEGIN LICENSE —–
	Michael Barnes
	Single User License
	EA7E-821385
	8A353C41 872A0D5C DF9B2950 AFF6F667
	C458EA6D 8EA3C286 98D1D650 131A97AB
	AA919AEC EF20E143 B361B1E7 4C8B7F04