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August 17, 2019 – 8:04 pm

Consider this not-so-hypothetical scenario: you have some data on server_a that you would like to copy to server_b. Unfortunately, these two servers cannot communicate with each other. Nor do they have access to any common …

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Unix and Linux network configuration. Multiple network interfaces. Bridged NICs. High-availability network configurations.

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Distributed server monitoring. Server performance and capacity planning. Monitoring applications, network status and user activity.

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Cool Unix shell commands and options. Command-line tools and application. Things every Unix sysadmin needs to know.

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Awesome Shell

December 24, 2016 – 3:52 pm
shell_0007

An excellent collection of programs and scripts to extend your shell’s capabilities.

Razer Mechanical Keyboard Case

August 21, 2016 – 1:15 pm
rz001

A really cool mechanical keyboard case for iPad Pro by Razer. Almost makes me wanna get the iPad, just so i can get this keyboard.
http://www.razerzone.com/gaming-keyboards-keypads/razer-mechanical-keyboard-case-ipad-pro

A tcpdump Primer with Examples

June 10, 2016 – 11:15 am
network switch

“A tcpdump Primer with Examples”
A good overview of tcpdump functionality and syntax, complete with basic and advanced examples.

Avoiding CPU Speed Scaling

May 18, 2016 – 1:04 pm
cpu

Disabling CPU speed scaling can boost your system’s performance and responsiveness at a slightly higher power consumption. Here’s a good article explaining the process.

Top 30 Nmap Command Examples For Sys/Network Admins

May 11, 2016 – 2:39 pm
network_cable_01

Useful nmap examples for system and network administrators.

How to: Linux Iptables block common attacks

May 10, 2016 – 2:37 pm
firewall-icon

IPTables filters and other tricks to prevent common syn-flood and malformed packet attacks on your server.

Avoid IP Spoofing And Bad Addresses Attacks

May 9, 2016 – 2:01 pm
firewall-icon

Spoofing and bad address attacks attempt to fool the server into believing packets had come from local network. Here’s a brief explanation and a useful script that uses IPTables to prevent such exploits.