" Linux "

Proxmox/OpenVZ Can’t umount (unmount) device or resource busy

Recently when working on an OpenVZ container I was attempting to create a backup. ¬†While doing so I kept running into a problem where the server wouldn’t let me unmount the container in order to create the backup. ¬†The error you may see in this instance would say “Can’t umount /var/lib/vz/root/OpenVZID device or resource busy”, or¬†“Can’t umount /var/lib/vz/root/100: Device or resource busy¬†TASK ERROR: command ‘vzctl umount 100’ failed: exit code 51″, in this case the container being 100. ¬†Here’s how I was able to fix it …¬† (more…)

Tutorial How to build the Ultimate Bootable Custom USB Flash Drive with Multiple ISOs for Windows, Linux, Etc, and PortableApps for Windows Desktop.

If you’re like me at all you probably have more flash drives than you want to carry around, especially when they could all probably fit on one. ¬†After my old 64GB flash drive took a dump I decided to purchase a new 64GB flash drive with USB 3.0 and compatibility for USB 2.0 and USB 1.1. ¬†When I got the new flash drive I was determined to figure out a way to get rid of my bulky CD case and just carry this one drive around with me. ¬†That means getting rid of all my Windows 7, Windows XP, Windows 8, Server 2003, Server 2008, Ubuntu 12.04, Linux Mint 13…I think you get the point. ¬†The problem is there’s no real easy way to create a flash drive that can store all of these, and boot into any of your choosing, and still be functional under Windows when using it for troubleshooting or repairing workstations…until now. (more…)

Linux Bash Script to Patch WHMCS 5.1 Google Checkout Security Vulnerability

Yesterday WHMCS released an announcement that there was a security vulnerability with the Google Checkout module in the 5.0 – 5.1.2 versions of WHMCS. This vulnerability can permit a malicious user to inject SQL via the Google Checkout module. (more…)

How to sync or copy files between servers and/or workstations using RSYNC under CentOS Linux

Here’s a few quick tips on how to sync files between servers or workstations using rsync. (more…)