Cybersecurity: It's our problem | IT Security | TechRepublic.com

Cybersecurity: It's our problem | IT Security | TechRepublic.com: "Cybersecurity: It's our problem"
An interesting idea on what future options exist for cyber law enforcement.

How to reduce spam: Writing Rules for SpamAssassin to Avoid Spam, a Primer

How to reduce spam: Writing Rules for SpamAssassin to Avoid Spam, a Primer: "A Guide to Writing your own Add-On Rules for SpamAssassin"

This is a very good introduction to writing rules for SpamAssassin. Especially simple ones to target short term SPAM patterns that may not spread to other geographic areas, or other businesses.

A computer geek's guide to building a 64-bit server on a budget | Microsoft Windows | TechRepublic.com

A computer geek's guide to building a 64-bit server on a budget | Microsoft Windows | TechRepublic.com: "A computer geek's guide to building a 64-bit server on a budget"

A TechRepublic article I want to get back to when I have the time to read it properly.

www.centos.org - Forums - CentOS 5 - General Support - yum update three systems with only one download?

www.centos.org - Forums - CentOS 5 - General Support - yum update three systems with only one download?:
"rsync --archive /var/cache/yum/ machine2:/var/cache/yum/"
Here's a simple way to use rsync to update the yum cache of machines from that of a previously updated machine prior to running yum update on the machine.
This can save up to a gig or more of download across 4 or more machines.

Windows Xp Registry Tips & Tweaks - www.hiren.info

Windows Xp Registry Tips & Tweaks - www.hiren.info: "Windows Xp Registry Tips & Tweaks"

This page has some interesting registry hacks for XP. (and possibly 2003/8 server?)
The "Command Prompt Here" tweak is something every command prompt user needs.

Red Hat Magazine | A guide to GNU Screen

Red Hat Magazine | A guide to GNU Screen: "A guide to GNU Screen"

A good article from the boys at Red Hat on the many uses of the screen command.
The shared screen session for teaching other people is something I didn't know about, but I'm likely to use.

Performanceoptimizer malware hits www.defsounds.com - Spyware Sucks

Performanceoptimizer malware hits www.defsounds.com - Spyware Sucks: "Spyware Sucks"

Not the most recent entry in this Blog, but click on the "Home" link on the left to get to the latest.
How does malware get on your computer? This site can tell you not only how, but where, when, and who was involved in making it happen.

A most interesting and commendable pastime this Person has chosen.

Keeping Your VMware Linux Guest’s Clock Accurate | Excalibur Partners, LLC

Keeping Your VMware Linux Guest’s Clock Accurate | Excalibur Partners, LLC: "Keeping Your VMware Linux Guest’s Clock Accurate"

Extra Kernel parameters added are - clock=pit nosmp noapic nolapic

If using ntpd to keep time in sync, then, disable time sync in the vmware tools.

As first line of ntp.conf
tinker panic 0
This makes it sync when the error is large. Needed after suspends and snapshots.

Bash by example, Part 2

Bash by example, Part 2: "Bash by example, Part 2"

IBM's contribution to learning the Bash shell and associated scripting commands.
This is the part that covers conditional constructs such as "if" and moves on to deal with "for" and "case" etc.

TCP Segment of a Reassembled PDU - PHWinfo

TCP Segment of a Reassembled PDU - PHWinfo: "TCP Segment of a Reassembled PDU"

However this series of communications is more about the MTU problem diagnostic process. The problems introduced by dropping _all_ ping packets is discussed as are the habits of the Microsoft TCP stack.
Some good information for trouble shooting slow data transfers on the same network segment.

Bash Guide for Beginners

Bash Guide for Beginners: "Bash Guide for Beginners"

Here's a good tutorial on Bash and the associated scripting languages and/or commands

IPtables: Connection tracking

IPtables: Connection tracking: "Connection tracking"
An article explaining iptables connection tracking as used in a stateful firewall.

10 ways to reduce removable media headaches in Linux | 10 Things | TechRepublic.com

10 ways to reduce removable media headaches in Linux | 10 Things | TechRepublic.com: "10 ways to reduce removable media headaches in Linux"

The part on using udev to see a removable media device as the same device name (/dev/ipod instead of /dev/sdb) is interesting, but not explained in enough detail to make it immediatly usable. I'm guessing the lspsci command, or viewing some of the information in /proc/ will show what needs to be entered to define the device.

fewt@blog:~$ _: Performance Tuning VMWare Server on Ubuntu Linux

fewt@blog:~$ _: Performance Tuning VMWare Server on Ubuntu Linux: "Performance Tuning VMWare Server on Ubuntu Linux"

Great tuning tips for any platform of linux (with appropriate changes for flavour)
Tested and verified on CentOS 4.7 64bit and vmware server 1.06.

Clint Huffman's Windows Performance Blog : Identifying 32-bit Kernel Memory Issues

Clint Huffman's Windows Performance Blog : Identifying 32-bit Kernel Memory Issues: "Identifying 32-bit Kernel Memory Issues"
This is a great source of information on performance analysis.

Installing Mondo Rescue on Clark Connect.

Packages required:-
These worked for me on Clark Connect version 4.3
gzip is installed by default on my system.
mindi-1.2.0-2.rhel4.i586.rpm
mindi-busybox-1.2.2-2.rhel4.i586.rpm
mondo-2.2.0-2.rhel4.i586.rpm

You need to connect in using ssh and install these packages.
dvd+rw-tools
which
afio
mkisofs

apt-get install dvd+rw-tools which afio mkisofs

These versions threw errors after upgrading to them.
mindi-2.0.4-1.rhel4.i386.rpm
mindi-busybox-1.7.3-1.rhel4.i386.rpm
mondo-2.2.7-1.rhel4.i386.rpm

Complaints about mindi errors with /dev/md2
The problem was solved by removing references to LABEL in /etc/fstab
The system involved was using software raid1 but the swap partitions (one per drive) had been created as
LABEL=SWAP-sda2 swap swap defaults 0 0
LABEL=SWAP-sdb2 swap swap defaults 0 0
The answer was to change them to /dev/sda2 and /dev/sdb2 respectivly, removing the reference to LABEL.
These latest versions of mondo mindi and mindi-busybox are now working fine.

vmware-server VM backups |

vmware-server VM backups |: "vmware-server VM backups"

Some ideas, and a script to suspend VM's then backup their images, and resume them.

AdmiNirvana » VMware Server Tips ‘n Tricks

AdmiNirvana » VMware Server Tips ‘n Tricks: "VMware Server Tips ‘n Tricks"

More vmware tricks and tips.
Resizing vmware linux client drives, etc.

Static Key Mini-HOWTO

Static Key Mini-HOWTO: "Static Key Mini-HOWTO"

I'm working on finding the best way to use openvpn to replace (ipsec like) network to network VPN connections.
More links to relevant web pages will follow. (I hope :-) )

Adjust these performance options to speed up Windows XP | Microsoft Windows | TechRepublic.com

Adjust these performance options to speed up Windows XP | Microsoft Windows | TechRepublic.com: "Adjust these performance options to speed up Windows XP"

Some of the more interesting suggestions are in the comments following the article.