Author Archives: Brennan

Mailx: /usr/lib/sendmail: No such file or directory

By | August 30, 2016

Symptom Trying to send mail through mailx, echo “Testing mailx” | mailx -s “Testing 1 2 3” test@example.com yields the following error: /usr/lib/sendmail: No such file or directory “/home/username/dead.letter” 9/261 . . . message not sent. Possible Cause Name of mailx configuration file is set incorrectly. Solution Rename mailx configuration file from /etc/mail.rc to /etc/nail.rc… Read More »

Contact Form 7 Cannot Send Emails from DigitalOcean Server

By | April 3, 2016

“Failed to send your message. Please try later or contact the administrator by another method.” Are you seeing the above error when trying to send a message via the Contact Form 7 plugin for WordPress? The Contact Form 7 plugin sends email using a mail server installed on your DigitalOcean server. If no mail server… Read More »

Cinnamon Crashes after Replacing Video Card

By | January 21, 2016

Symptom: After removing an AMD graphics card (to use onboard integrated graphics), Cinnamon crashes repeatedly after logging in. Cause: Cinnamon may still be referencing the old video drivers. Solution: Uninstall the proprietary AMD graphic card drivers. Troubleshooting Steps: List installed AMD packages -> dpkg -l *fglrx* Remove the installed AMD packages and drivers with sudo… Read More »

Open Source Gaming on the Raspberry Pi

By | January 18, 2016

The Raspberry Pi is an inexpensive computer about the size of a credit card that was designed to promote the teaching of computer science. In the spirit of openness, this post focuses on open source games whose code can be studied, analyzed, customized and perhaps even improved upon, by anyone. I’ll start off by explaining… Read More »