HyperCard is an application program created by Bill Atkinson for Apple Computer, Inc. that was among the first successful hypermedia systems before the World Wide Web. It combines database capabilities with a graphical, flexible, user-modifiable interface.[1] HyperCard also features HyperTalk, written by Dan Winkler, a programming language for manipulating data and the user interface. Some HyperCard users employed it as a programming system for Rapid Application Development of applications and databases.
HyperCard was originally released in 1987 for $49.95, and was included with all new Macs sold at the time.[2] It was withdrawn from sale in March 2004, although by then it had not been updated for many years.
Author Archives: mea
New Study Reinforces Case for DC Power Savings
But advocates of DC power continue to make the case for direct current distribution in data centers. The recent Data Center Efficiency Summit featured a case study showing gains over AC systems, and discussion of whether global efforts to establish a standard for 380 volt systems might build momentum for DC power.
via New Study Reinforces Case for DC Power Savings » Data Center Knowledge.
Linux Firewalls Using iptables
Quick HOWTO : Ch14 : Linux Firewalls Using iptables – Linux Home Networking.
This site was also linked here last May but is so useful I needed to bring it to the top again. Here’s a pertinent figure that describes the iptables process that I seem to need to reference all the time when editing the iptables config file.
KVM (Kernel-mode Virtual Machine)
KVM (Kernel-mode Virtual Machine).
Kernel-mode Virtual Machines (http://kvm.qumranet.com/) is a virtualization platform that leverages the virtualization capabilities available with current microprocessors from both Intel™ and AMD™. For an overview of KVM, please see my 2008 Linuxfest Northwest presentation.
Setting Up Squid In Gateway As A Transparent Proxy
Setting Up Squid In Gateway As A Transparent Proxy – Welcome to SourceLINUX Wiki...
Good howto for setting up squid. This link was also posted last May.
Terahertz wireless chip brings 30Gbps networks, subcutaneous scanning
Rohm, a Japanese semiconductor company, has created a silicon chip and antenna that’s currently capable of transmitting 1.5Gbps, with the potential to scale up to 30Gbps in the future. By comparison, the fastest 802.11 (WiFi) transmission speeds max out at around 150Mbps, and the incoming WiGig standard peaks at 7Gbps.
via Terahertz wireless chip brings 30Gbps networks, subcutaneous scanning | ExtremeTech.
Shoreline Firewall
The Shoreline Firewall, more commonly known as “Shorewall”, is high-level tool for configuring Netfilter. You describe your firewall/gateway requirements using entries in a set of configuration files. Shorewall reads those configuration files and with the help of the iptables, iptables-restore, ip and tc utilities, Shorewall configures Netfilter and the Linux networking subsystem to match your requirements. Shorewall can be used on a dedicated firewall system, a multi-function gateway/router/server or on a standalone GNU/Linux system. Shorewall does not use Netfilter’s ipchains compatibility mode and can thus take advantage of Netfilter’s connection state tracking capabilities.
Shorewall is not a daemon. Once Shorewall has configured the Linux networking subsystem, its job is complete and there is no “Shorewall process” left running in your system. The /sbin/shorewall program can be used at any time to monitor the Netfilter firewall.
Schneier on Security: My Open Wireless Network
Whenever I talk or write about my own security setup, the one thing that surprises people — and attracts the most criticism — is the fact that I run an open wireless network at home. There’s no password. There’s no encryption. Anyone with wireless capability who can see my network can use it to access the internet.
20 Linux System Monitoring Tools Every SysAdmin Should Know
List of router or firewall distributions
This is a list of operating system distributions designed for use as the operating system of a machine acting as a router and/or firewall.
List of router or firewall distributions – Wikipedia, the free encyclopedia.