How to display longer username in `ps`
Have you ever had the need to show the full username in ps output? Here is how. Normally in Bash, the ps output truncates an username to 7 characters and a \+ sign, e.g IUSR_60\+. In cases when you absolutely need the full username in ps, this can be pretty annoying. Here is how to display longer usernames in ps
Force HSTS in Apache .htaccess
Learn how to enable HSTS in Apache .htaccess configuration file to start using HTTP Strict Transport Security (HSTS)
Recursive scp and symlinks
TL;DR, when using recursive scp, symbolic links aren't preserved and are copied as if they are normal directories. So you have to look for another solution to recursively transfer symlinks over ssh. Use Tar over ssh!
Generate pseudo-random passwords with OpenSSL
OpenSSL comes in handy when you need to generate random passwords, for example for system accounts and services. In this short post I'll give you a quick example on how to generate random passwords with OpenSSL in Linux (Bash), Windows and PHP.
Redirect HTTP to HTTPS
In this post I provide you various HTTP to HTTPS redirection methods, for Windows Server IIS and Linux Apache. Use these examples to your advantage to secure the traffic between your visitors and your website.
Sysadmins of the North goes global!
How to set up a global Geolocation DNS load balancing Varnish Cache Content Delivery Network with Bind9, geo-ip database, Varnish Cache and DigtalOcean. DIY High-Availability for your website!
Test SMTP Authentication and StartTLS
Investigate SMTP authentication issues like a boss! Particular over TLS encrypted SMTP connections, it's always handy if you are able to test the SMTP authentication and StartTLS connection. Preferably from your command-prompt.
Bash: Grep through a large number of files - "Argument list too long"
/bash/grep and /bash/rm give me an error Argument list too long. Here is how to overcome this grep error.
Installing Debian GNU/Linux 7.0 (Wheezy) on HP EliteBook 8570w
I was FedUp with Fedora Core 17/18 after a day, so I decided to return to my old love: Debian GNU/Linux. It's been a couple of years, but I'm happy to be back! Just run the netinst installer which will take care of the most.
Check IP address blacklist status in Bash
Here is a Linux Bash shell script to check whether an IP address is listed in a DNSBL blacklist, or RBL. Using this script in Bash you can quickly test if an IP address is blacklisted.
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