Products
Tools for Storage Monitoring: iostat
The world of Linux storage tools for both monitoring and management just stinks. But that doesn’t mean that there is absolutely nothing to help with monitoring. One such tool, iostat, can be used to watch what your storage devices are up to.
Introductory Rant
The complete lack of good tools for...
Installing Cherokee With PHP5 And MySQL Support On Ubuntu 10.10
Cherokee is a very fast, flexible and easy to configure Web Server. It supports the widespread technologies nowadays: FastCGI, SCGI, PHP, CGI, TLS and SSL encrypted connections, virtual hosts, authentication, on the fly encoding, load balancing, Apache compatible log files, and much more....
Install SugarCRM community edition in Ubuntu 10.04
SugarCRM is a complete CRM system for businesses of all sizes. Core CRM functionality includes sales force automation, marketing campaigns, support cases, project management, calendaring, and more. It supports MySQL and MS SQL Server.
Sugar consists of modules, each of which represents a...
Ubuntu Server Fault Tolerance
This chapter discusses some of the methods you can use with Ubuntu servers to make them more fault-tolerant, starting with some general fault tolerance principles, then covering ways to add fault tolerance to your storage and network with RAID and Ethernet bonding, respectively, and...
How to Choose and Remember Great Passwords that Live in Your Head: Video Edition
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We love a strong...
Basic Linux
Introduction
Scope of this Manual
This manual provides a brief introduction how to get started using powerful Linux command-line utilities.
How to Get Access?
Install your preferred GNU/Linux distribution on your local machine (not required!!!)
Users at UC Riverside can apply for...
R & Bioconductor Manual
Index
R Basics
Introduction
Finding Help
Basics on Functions and Packages
System commands under Linux
Reading and Writing External Data
R Objects
Object and Data Types
General Subsetting Rules
...
A brief introduction to “apply” in R
At any R Q&A site, you’ll frequently see an exchange like this one:
Q: How can I use a loop to [...insert task here...] ?
A: Don’t. Use one of the apply functions.
So, what are these wondrous apply functions and how do they work? I think the best way to figure out anything in R is to...
Monte carlo testing of classification
This is another article on the theme of defining groups in a hierarchical classification. A previous article described homogeneity analysis to visualize how any well any number of groups, defined at the same level accounts for the variability in the dataset, as measured by within-group pairwise...
Turning your data into a 3d chart
Some charts are to help you analyse data. Some charts are to wow people. 3d charts are often the latter, but occasionally the former. In this post, we’ll look at how to turn your data into a 3d chart.
Let’s use the data from this previous post. Use the code which turns the .csv spreadsheet...