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Bash scripting: lists and random things

April 16, 2013 – 12:39 pm |

Imagine you have an HPC cluster with a hundred compute nodes named node001-node100. The two commands below will help you generate a list of node names – either all name on one line or one name per …

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Articles tagged with: recovery

VxVM Recovery Cheatsheet for Solaris

May 15, 2008 – 6:22 pm | 9 Comments

This is a quick-and-dirty guide to recovering VxVM volumes and filesystems on a Solaris server. These instructions are not intended to be an in-depth troubleshooting guide for the Veritas Volume Manager. This is just something …

ReiserFS Filesystem Recovery

March 21, 2008 – 3:55 pm | One Comment

The this is a description of a method for recovering ReiserFS filesystems from failed disks with bad blocks, when other recovery methods (reiserfsck) will not work. For this example, the failed server is called node1 …

Protected: Notes on Electronic Security

February 7, 2006 – 12:05 pm | Enter your password to view comments.

There is no excerpt because this is a protected post.

Resetting Root Password under Solaris

November 20, 2005 – 2:02 am | 3 Comments

The following document explains how to change an unknown root password on a Solaris system. Use this only for disaster recovery purposes. Please be sure to read the Notes section below if you run into …

Event Log »

Dell Changes Up OpenStack Cloud Plans

In a major announcement from Dell yesterday, the company announced that its public cloud ecosystem and strategy will be centered on partners Joyent, ScaleMatrix and ZeroLag, and will emphasize recent acquisition Enstratius. The announcement represents …

Improving U.S. Weather Prediction With Petascale Supercomputing

Over at the Washington Post, Jason Samenow writes that an infusion of funding into the National Weather Service from Hurricane Sandy relief legislation promises to facilitate massive upgrades to key supercomputers, dramatically improving local, national, …

Google and NASA Collaborate on AI Research With New Quantum Supercomputer

Google and NASA have teamed up to launch a new laboratory focused on advancing machine learning. The Quantum Artificial Intelligence Lab — hosted at NASA’s Ames Research Center in California — will contain a quantum …

Your Cloud Provider Is Toast. Now What

Your cloud provider is great. Your cloud provider is cheap. Your cloud provider is out of business.
Now what do you do
If your favorite consumer cloud service goes out of business or simply feels it’s time …

Best Linux Tools for Enterprise Developers and Systems Administrators

It’s a testament to Linux’s ubiquity and versatility today that so many “best of” lists are published focusing on the free and open source operating system.
Just in the past few months here on Linux.com, for …

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Networking »

Fixing the mount.nfs: rpc.statd is not running Error

The rpc.statd service is used by NFS client to help it recover from loss of connectivity to the NFS server. When rpc.statd is not running, NFS is not able to handle remote file locking. You …

Red Hat: Changing Hostname and IP

Changing hostname and IP is frequently required when a server is being moved from testing or development to production. The process is a fairly simple one, but steps must be performed in a certain order to avoid complications.

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Applications »

Install Pflogsumm PostFix Log Summarizer

Pflogsumm is yet another log analyzer/summarizer for Postfix. It is written in Perl and has been around for a while. Very simple to install, so I writing this post mostly as a note to myself. …

Installing Sendmail Analyzer on RHEL/CentOS

The Sendmail Analyzer can be useful for visualizing your Sendmail/Postfix log. The commands below can be copy-pasted as root on default installations of RHEL and CentOS 5/6 with default Postfix and httpd. If your configuration …

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Data »

Filesystem Performance Testing Using dd

Below is a simple script to test filesystem read/write performance using dd with varying blocksize parameter. This can be useful for testing local filesystems as well as network-mounted filesystems. The end result will be a …

Quick BTRFS Test on OpenSuse 12.2

The recent announcement from Suse Enterprise Linux that Btrfs was production-ready raised some suspicions. The last time I tested btrfs (not very long ago) the primary issues were excessive CPU utilization and filesystem space that seemed to disappear into nowhere. So, as a quick test, I put together an OpenSuse 12.2 (3.4.6-2.10-desktop, OpenSuse 12.2) 64-bit VM (ESX) with one dual-core vCPUs, 4GB RAM, the OS disk and a 6GB striped LVM filesystem consisting of 4 4-GB virtual disks.

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Featured »

Bash scripting: lists and random things

Articles tagged with: recovery

VxVM Recovery Cheatsheet for Solaris

ReiserFS Filesystem Recovery

Protected: Notes on Electronic Security

Resetting Root Password under Solaris

Event Log »

Dell Changes Up OpenStack Cloud Plans

Improving U.S. Weather Prediction With Petascale Supercomputing

Google and NASA Collaborate on AI Research With New Quantum Supercomputer

Your Cloud Provider Is Toast. Now What

Best Linux Tools for Enterprise Developers and Systems Administrators

Networking »

Fixing the mount.nfs: rpc.statd is not running Error

Red Hat: Changing Hostname and IP

Applications »

Install Pflogsumm PostFix Log Summarizer

Installing Sendmail Analyzer on RHEL/CentOS

Data »

Filesystem Performance Testing Using dd

Quick BTRFS Test on OpenSuse 12.2

Monitoring »

openlava Quick Test

Filesystem Performance Testing Using dd

Commands & Shells »

Bash scripting: lists and random things

Fast IP Range Scanner in Bash

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