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Category Archives: sysadmin
Always Fill Saved Credentials in Firefox
Sometimes web page Javascript will disallow you to auto fill your saved password credentials. In recent versions of Firefox there’s now a way to fill out credentials without digging into preferences -> security -> saved passwords. Simply enter the username … Continue reading
Posted in open source, sysadmin
Tagged firefox, password, security, tip, web browser
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How to Manually Create/Tune an Elasticsearch Index
The ELK stack provides a very powerful set of tools that allow administrators and developers unfettered access and customizable log aggregation across any manner of server, application or device. Recently I needed to stand up a new ELK stack on … Continue reading
Posted in open source, sysadmin
Tagged elasticsearch, elk, linux, logging, logstash, sysadmin
2 Comments
Learning OpenStack Networking (Neutron) 2nd Edition
I’ve recently had the pleasure of editing/reviewing the new second edition OpenStack Neutron book by James Denton. It’s published by Pakt Publishing who has also published a few other OpenStack-related books, including one by Dan Radez on OpenStack Essentials. OpenStack … Continue reading
Rate Limiting and Multicast on Dell Force10 Switches
Sometimes it’s hard finding extensive, easily digestible documentation on FTOS running on the Dell Force10 switch platform. Recently we had to apply simple rate limiting against ports generating more bandwidth than they should but not get too in the weeds … Continue reading
Posted in open source, sysadmin
Tagged dell, force10, ftos, multicast, networking, rate limiting, switch, sysadmin
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Create vsftpd Users the Easy Way
The FTP protocol has been around a long time, some of us remember using it fondly while others might shudder at the very mention of its name. The fact remains it’s not going away, and it does what it’s supposed … Continue reading
Posted in open source, sysadmin
Tagged automation, ftp, linux, open source, sysadmin, vsftpd
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Take Control of your Email with Mutt, OfflineIMAP and Notmuch
I’ve been an avid user of the Mutt email client for quite some time, preferring it to GUI clients or web for its speed, hotkey-everything approach, and integration with vim that compliment my daily workflow. Still, I found search functionality … Continue reading
Posted in open source, sysadmin
Tagged email, gmail offlineimap mutt, linux, mutt, neomutt offlineimap linux, notmuch, notmuch mutt offlineimap, offlineimap, productivity, sysadmin
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Getting OpenStack Tenant Info by Floating IP Address
When running a public cloud you sometimes need to obtain user or tenant information quickly based on their public IP address. Here is a simple shell tool to accomplish this rather than having to piece together information in several commands, … Continue reading
Posted in open source, sysadmin
Tagged cloud, openstack, public cloud, sysadmin, tooling
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Make OpenStack Glance Images Accessible to Selective Tenants
Recently I needed to make a Glance image available to a specific user but not make it public. In this example an image needed to be available only to the services tenant and owner. There’s a facility for this inside … Continue reading
Automating Dell iDRAC Administration with Racadm
Managing more than a handful of Dell servers becomes cumbersome using the iDRAC web interface. This is especially painful with several hundred servers or more. Luckily Dell provides CLI tools you can use with XML templates to automate provisioning and … Continue reading
Simple Disk Performance Testing with Linux
I recently did some testing on my home Linux fileserver with Bonnie++ at the urging of a friend who wanted to compare his numbers. I also ran similar tests with dd and hdparm. Here’s what I ran, the results, and … Continue reading
Using KWin with Xfce
I’ve been a long-time Xfce user as I’ve bounced around any manner of window manager and desktop environment since the turn of the century. I always found 3D effects like viewing all window spaces, and exposé-type features to be useful … Continue reading
OpenStack Essentials by Dan Radez
I’ve recently had the pleasure of helping edit/review the awesome OpenStack Essentials by my friend and colleague Dan Radez. Highly recommended reading for anyone getting into OpenStack who is interested in an easy-to-read deep dive of OpenStack, setting up your … Continue reading
Create OpenStack Users the Easy Way
When you’ve created more than one OpenStack user via the CLI or Horizon dashboard it gets old really quick. It’s a good idea to automate it or use a tool to do the job for you.
Posted in open source, sysadmin
Tagged automation, cloud, devops, linux, openstack, shell, tool
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Secure Cloud Data Backups using Python, Tar and GPG
The Cloud (aka another dude’s computer) is a great place to backup your data, files and make your life easier and your technical resources more accessible. It can also be extremely dangerous if you don’t take steps to protect your … Continue reading
Workaround for Foreman-Proxy Scale Issue: DHCPD and lots of VM’s
Foreman is an awesome provisioning, utility and life-cycle management solution for Linux and UNIX-like server infrastructure. It unifies a lot of things like DHCP, DNS, PXE, and automated provisioning into one tool. Unfortunately we’ve hit some issues with scaling the … Continue reading
Posted in open source, sysadmin
Tagged dhcpd, foreman, foreman-proxy, infrastructure, linux, scale, sysadmin
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