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.
Convert decimal to hex in Bash?
A quicky for my archives, learn how to convert decimal to hex and hexadecimal to decimal, in Bash...
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!
How to delete all MAILER-DAEMON emails in Postfix queue
How to delete all MAILER-DAEMON emails from your Postfix queue, when it matches a sender or recipient email address condition. In Postfix, there are various similar commands to delete messages from the Postfix mail queue, based on the Message-ID and/or email address for example...
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.
Ssh shorthand name for hostnames
How to use shorthand names for hostnames with ssh? You don't always want to type in a complete host name when using ssh to remote hosts. Here is how to configure and use shorthand hostnames with ssh.
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