These are my links for 19 lug 2012 through 20 lug 2012:
Mail server statistics – The statistics are based on completely anonymous information and were performed using randomly chosen IP addresses. When connecting to a mail server defined as an MX in the domain configuration, it can reply in a different number of ways. It may not be online, or may be refusing connections. Also, it is possible that the server does not respond back with a "220" line within the period of time we wait, nor provide a banner that identifies the type of the software running on it, at all times.
Most systems admin is used to setting up the primary mail server, but many of them (like me) are not used to setup a backup mail server in a regular basis. This is my attempt to create a complete document on setting up a backup mail server and testing it for the dooms day. [...]
These are my links for 28 giu 2012 through 1 lug 2012:
Linux Training – Paul Cobbaut has written an in-depth series on learning Linux for novice sysadmins or just those curious about the command line. Beginning with setting up a virtual machine for the lessons, the guide proceeds to cover a massive amount of material, including:
FHS, Bash, vi, users, groups, file permissions, ACLs, file links, processes, pipes, filters, scripting, disks, partitions, file systems, mounting, UUID, RAID, LVM, GRUB/LILO, init, kernel, libraries, TCP/IP, bonding, SSH, inetd, xinetd, OpenSSH, nfs, at, cron, syslog, installation, packages, backup, performance, iptables, Samba, MySQL, SELinux, Apache, Squid, IPv6, and DNS/BIND.
Formats include HTML, PDF, and DocBook source.
home | movies.io – movies.io combines a pleasant and great-looking user interface with all the functionality needed to find and collect the best films out there.
Sign in, and you'll be able to create watchlists, edit them with your friends, and subscribe to their RSS feeds for automatic download.
FTPbox – File syncing on your own host – FTPbox is an open-source application that allows you to synchronize your files to your own host, via FTP. This way, you can access your files anywhere, without having to pay for disk space on some 3rd-party website!
Graphite – Scalable Realtime Graphing – Graphite – Graphite is a highly scalable real-time graphing system. As a user, you write an application that collects numeric time-series data that you are interested in graphing, and send it to Graphite's processing backend, carbon, which stores the data in Graphite's specialized database. The data can then be visualized through graphite's web interfaces.
These are my links for 30 dic 2011 through 2 gen 2012:
fahd.blog: Find Blocking Processes Using sp_who [Sybase] – If a user has executed an insert/update on a table, but not committed the transaction, other users will find that their queries on the same table hang. This is because the table has been locked and the first user's process is blocking everyone else's.
OpenShift by Red Hat – What is OpenShift?
OpenShift, is a portfolio of free, portable cloud services for deploying and managing applications in the cloud. Currently there are two application deployment services offered as part of OpenShift; Express & Flex.
What is OpenShift Express and when should I use it?
Express is a free, cloud-based application platform for Java, Perl, PHP, Python, and Ruby applications delivered in a shared-hosting model. With just a few commands you’ll be able to deploy your application to the cloud.
What is OpenShift Flex and why should I use it?
Flex is a cloud-based application platform for Java EE and PHP. Applications can be deployed on middleware components such as JBoss and Tomcat. Flex is an ideal platform for those who require a greater degree of control and choice over their middleware components with valuable features including versioning, monitoring and auto-scaling.
saidar – saidar is a curses-based tool for viewing the system statistics available through libstatgrab. Statistics include CPU, processes, load, memory, swap, network I/O, disk I/O, and file system information.
"like a small nmon"
[ via http://www.spippolazione.net/index.php/2011/12/30/saidar ]
In sum, I’m running Varnish as a front-end to Nginx which is running WordPress loaded with the W3-Total-Cache plugin. The W3-Total-Cache plugin is configured to use both memcached as well as Amazon S3 as its CDN. All of this sits on Ubuntu Linux with Linode as my host.
A Varnish Primer | danielmiessler.com – Despite the title, this article has nothing to do with painting. Here I'm going to talk a bit about the Varnish Cache — a web application accelerator designed to dramatically improve how quickly your website loads. Varnish works by caching and serving as much content as possible as "static", including dynamic results, e.g. blog posts from a CMS like WordPress.
Varnish best practices « Kristian Lyngstol’s Blog – A while ago I wrote about common Varnish issues, and I think it’s time for an updated version. This time, I’ve decided to include a few somewhat uncommon issues that, if set, can be difficult to spot or track down. A sort of pitfall-avoidance, if you will. I’ll add a little summary with parameters and such at the end.