How To Increase Xen Disk Image Of Virtual Machine Guest (DomU)

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Category: Xen

Last Updated on Thursday, 14 March 2013 18:29

Published on Thursday, 14 March 2013 18:29

Written by chr1x2

This note is how I increased the root partition of Xen Guest virtual machine. I don't guarantee that this will work for you.

1. Login to your VM guest and verify disk usage:

# df -h

Filesystem            Size  Used Avail Use% Mounted on
/dev/xvda1            2.0G  600M  1.3G  32% /
tmpfs

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How To Backup Large Live MySQL Database Without Affecting The CPU Load

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Category: MySQL

Last Updated on Wednesday, 06 March 2013 14:44

Published on Wednesday, 06 March 2013 14:42

Written by chr1x2

I have a busy website with large MySQL database (21GB). This notes will show how to dump the database without affecting the load of the sever.

# mysqldump -u root -p --single-transaction --quick DATABASENAME > DATABASENAME.sql

Options:

--single-transaction

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How To Fix GRUB Stuck/Hanging On Menu After Power Failure

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Category: Basics

Last Updated on Monday, 25 February 2013 11:53

Published on Monday, 25 February 2013 11:43

Written by chr1x2

In Ubuntu Server (10.04 to 12.04 I think), if a power failure happens (for any reasons) and suddenly shutdown the server, GRUB stays on the menu waiting for somebody to press Enter on the console.

This is a pain if the server is headless and no keyboard. This article will show you how to fix

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Two-way Synchronization Between Two Servers Using Unison

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Category: Unison

Last Updated on Monday, 25 February 2013 12:07

Published on Thursday, 21 February 2013 15:51

Written by chr1x2

This tutorial will sync the content (as a sample) of /usr/share/nginx/html between two CentOS servers.

Note: Unison version should be the same on both servers or else it won't work.

Server 1 & Server 2

1. Install rpmforge repo (install the correct architecture):

# rpm -Uvh

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