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Category Archives: System Administration

SOLVED: macOS Mojave 10.14.4 system frozen every morning

Hawk iMedia Posted on June 27, 2019 by Hawk iMediaJune 27, 2019

Since upgrading my iMac to macOS Mojave 10.14.4 several months ago, I have found the system frozen every morning, with no smoking guns. After weeks (months?) of this, trying many different “solutions”, and even calling Apple for help, I finally … Continue reading →

Posted in iDevBlogADay, Software Development, System Administration | Tagged Energy Saver, macOS, Mojave

Stop spammers at the gate: Don’t blindly trust SASL authenticated connections

Hawk iMedia Posted on April 2, 2016 by Hawk iMediaApril 2, 2016

Recently a user’s email password was cracked. Not long after, she started receiving hundreds of bounce messages. My first thought was that these messages were back scatter, produced when spammers insert any random sending server address. So bounce messages are … Continue reading →

Posted in System Administration | Tagged Postfix, smtpd_client_restrictions

Same site, new host

Hawk iMedia Posted on January 7, 2016 by Hawk iMediaJanuary 7, 2016

If you subscribe to this blog, you received notice of a new post, cleverly titled “test post”. Oops. Sorry. We were making sure we could still create content because we’ve moved the blog, wholesale, to an Amazon AWS EC2 instance. … Continue reading →

Posted in System Administration | Tagged Amazon EC2

RAID to the Rescue

Hawk iMedia Posted on October 29, 2015 by Hawk iMediaOctober 31, 2015

Thank G-d for RAID! And I’m not talking about the bug spray. I have a Linux server in my basement which hosts the family email, a few websites, and all our music and photos. I built this machine 5+ years … Continue reading →

Posted in System Administration | Tagged mdadm, RAID
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