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varsha Linux commands, Bind Configuration and Free DNS Tools
cloudibee Linux Commands If you need to find out quickly what a certain Linux/Unix command means, this manual comes really hand. It will provide you with all commands from A to…
Identifying SSL Certificate Algorithm using nmap and openssl command
SSL certificate signature algorithm can be identified using nmap or openssl command. Here are the steps to identify SSL certificate algorithms used in your webserver or other SSL endpoints. nmap…
Writing C software without stdlib
Major credits to http://betteros.org/ which got me into researchinglibc-free programming. Why would you want to avoid libc? Your code will have no dependencies other than the compiler. Not including the…
Disabling TLS 1.0 on Apache Linux Server
TLS 1.0 is end of life on June 30, 2018. To disable TLS 1.0 on Apache webserver installations, edit the “SSLProtocol” directive in your ssl.conf (typically /etc/httpd/conf.d/ssl.conf), where the ciphers…
Linux performance tuning – vm.swappiness
vm.swappiness takes a value between 0 and 100 to change the balance between swapping applications and freeing cache. At 100, the kernel will always prefer to find inactive pages and…
Linux Performance analysis tools
Understand how various Linux performance monitoring tools behave when the system is heavily loaded in terms of cpu, memory and swapping to disk (IO).
How to configure Static routing in Linux
Steps to configure static routing in Linux, with examples.
Splunk Search Tips Cheatsheet
Searching in Splunk gets really interesting if you know the most commonly used and useful command sets and tips. A handy document on splunk searches.
Pocket guide for NetApp commands (7-mode)
Comprehensive NetApp Commands list for 7-mode filers
Linux Network bonding – setup guide
Linux network bonding setup guide with detailed explanation of steps and bonding modes
NetApp performance monitoring : sysstat – Part I
NetApp performance monitoring
Linux Performance Observability tools diagram
linux performance tuning, linux, performance
Linux networking Using NMCLI
Linux networking and bonding using nmcli
Linux: CPU hammer stress testing script
Here is a simple shell script to load & hammer the CPU using awk. The script does simple recursive mathematical calculations and thus CPU load peaks up on higher values…
Disabling TLS 1.0 on nginx web servers
Disable TLS 1.0 and enable higher versions of TLS in nginx. To disable TLS 1.0 on nginx webserver installations, edit the "ssl_protocols" directive in your nginx.conf, where the TLS server…