Introduction
This LinuxAnswer describes how to set up public key authentication with ssh{1}.
It will include all sub components like scp too.
I will refer to the client machine{2} as the “client” and the server machine{3} as “server”
via Public key authentication with ssh – LinuxQuestions.org.
Hewlett-Packard, Dell and companies that sell the computers off the shelf are losing sales in a key market because Facebook and larger rival Google Inc. (GOOG) are leading a switch among Internet companies to do-it-yourself servers. These customized machines now account for 20 percent of the U.S. market for servers, which generated $31.9 billion globally in last year, said Jeffrey Hewitt, an analyst at Stamford, Connecticut-based Gartner Inc.
via Dell Loses Orders as Facebook Do-It-Yourself Servers Gain: Tech – Bloomberg.
Pacemaker keeps your applications running when they or the machines they’re running on fail. However it can’t do this without connectivity to the other machines in the cluster – a significant problem in its own right.
Rather than re-implement the wheel, Pacemaker supports existing implimentations such as Heartbeat. Heartbeat provides:
- a mechansigm to reliably send messages between nodes,
- notifications when machines appear and disappear
- a list of machines that are up that is consistent throughout the cluster
Heartbeat was also the first stack supported by the Pacemaker codebase.
via FAQ – ClusterLabs.
rsnapshot is a filesystem snapshot utility for making backups of local and remote systems.
Using rsync and hard links, it is possible to keep multiple, full backups instantly available. The disk space required is just a little more than the space of one full backup, plus incrementals.
Depending on your configuration, it is quite possible to set up in just a few minutes. Files can be restored by the users who own them, without the root user getting involved.
Via rsnapshot.
This short article explains how you can move/convert a Xen guest that uses disk images to LVM volumes. Virtual machines that use disk images are very slow and heavy on disk IO, therefore it’s often better to use LVM. Also, LVM-based guests are easier to back up (using LVM snapshots).
I do not issue any guarantee that this will work for you!
A while ago I thought it would be a good idea to make a backup of my Linux server by just dumping the complete disk to a file. In retrospect, it would have been much easier had I just dumped the individual filesystems.
via Mounting a hard disk image including partitions using Linux | andremiller.net.
Note: If printed at the download size you will see about 9 dBi of gain. If you double the size of the image before you print it you will see about 12 dBi of gain. If you place two reflectors on an AP with two antennas you will see an additional increase in performance.
For this project you are going to need scissors, a utility knife, some adhesive putty and an empty beer can. More than one empty beer can is acceptable but don’t kid yourself, the router only needs the one.
Via Boost Your WiFi Signal Using Only a Beer Can : Discovery Channel.
This is the tricky step. Unlike VMware Server, the Infrastructure Client does not have the File > Open option, allowing you to browse for existing .vmx configuration files and registering them. So it seems you might be stuck.
The answer lies in the datastore. In the destination folder, where you have just created your clone, right-click on the .vmx configuration file. Select Add to Inventory.
via How to clone virtual machines in VMware ESXi.
Update: This indeed worked. The problem occurs in that if a .vmx file is copied directly from Workstation, it can contain erroneous info that can cause problems. In my case eth0 would not pass traffic. I noticed something wrong by examining the virtual machines on Configuration -> Networking when the esxi box is selected. I noticed the vm I was having problems with wasn’t listed so I thought to examine the .vmx file.
The copied over .vmx file had ethernet0.vnet=”/dev/vmnet0″ which is a Workstation reference that doesn’t apply to esxi. By eliminating this and adding ethernet0.networkName = “VM Network” networking worked.
In our case, we selected physical computer but notice all the different sources you can import virtual machines from. You could import an existing virtual machine, a physical machine that this program is running on, or a remote machine over the network.
via VMware Converter: How to Move Physical Machines to VMs with VMware Converter – Part 2.