Awk & sed Snippets for SysAdmins

March 2, 2022 – 2:00 pm

Books have been written on the subject of awk and sed. Here’s a small sample of commands I put together over the years that are useful for everyday system administration tasks. Most of these tasks …

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Articles in Oracle

A creature in its death throes, Sun Microsystems gave birth to Solaris SMF – the product of a disturbing union between Unix System V and the Microsoft Windows Registry. Shortly thereafter the proud father died, …

Script to modify Veritas HA Cluster Resource Configuration

December 7, 2005 – 11:10 am

The following interactive Korn shell script can be used to make common changes to the configuration of Veritas HA Cluster resources. The script enables you to view the listing of available resources; view resource configuration; …

Bounce Veritas HA Cluster resource

December 7, 2005 – 11:01 am

The following is a Korn shell script that can be used from command line or cron to bounce a Veritas HA Cluster resource. This can be useful to resolve certain problems with Oracle databases running …

Oracle reinstallation

November 19, 2005 – 10:35 pm

Before beginning Oracle REinstall, make sure to remove the /var/opt/oracle/oraInst.loc file created by /tmp/orainstRoot.sh script during prior installation.

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Commands & Shells »

Plundering Facebook Photo Albums

Let’s imagine you need to download all the photos in a Facebook photo album. It can be a public album, a friend’s, or even your own. Sure, you can do this manually, but you probably …

Scraping a Web Page in Bash

Just a scripting exercise because I need to do something important, but I am procrastinating. The idea is simple: grab some URL with text containing somewhat structured data and convert it into a spreadsheet. I …

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Applications »

Processing Videos with ffmpeg and Lightroom

On occasion I wondered how to apply advanced photo filters to my lackluster GoPro and drone videos. You know, not the basic exposure/contrast/saturation or the cheesy special effects you find in video editors, but something …

Searching Twitter

Here are just a few hopefully useful tips for searching Twitter to get more relevant results and buy cheap twitter followers.

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Data »

Scraping a Web Page in Bash

Just a scripting exercise because I need to do something important, but I am procrastinating. The idea is simple: grab some URL with text containing somewhat structured data and convert it into a spreadsheet. I …

Generating Random Text Files for Testing

Sometimes you need dummy folder structures populated with random data for testing your various scripts and processes – backups, file transfers, encryption, compression, etc. Every time I need something like this, I end up writing …

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Monitoring »

Finding Cron Jobs

Cron is an indispensable tool for system administration. The difficulties in working with cron in a large environment stem from its decentralized nature. Cron jobs multiply like rabbits, and keeping track of them is not …

Understanding Memory Utilization in Linux

This is a depressing – and all-too-common – scenario: a user runs the free command and opens a support case because he sees zero “free” memory on the server.

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