Linode KVM Direct Disk Boot with Syslinux and Encrypted Root Partition

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I recently upgraded a Linode VPS from Xen to KVM to take advantage of touted performance boosts as well as the ability to boot directly from a disk partition of my choosing, with my preferred kernel and bootloader. I've standardized on using Syslinux on my home Arch Linux machines, so …

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Migrate LUKS Passphrase to File

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cryptsetup can be invoked with the -d switch to read the passphrase from a file on disk rather than from stdin. However, if you want to migrate an existing passphrase to a file, you'll probably have to take an additional step to make it actually work.

When reading input from …

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Quick Tips for Future Reference

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It's been a busy night fixing various bugs on the thisshitistemp.com server. Here's a collection of useful information for future reference.

smtpd_tls_security_level

Don't force Postfix stmpd encryption if you want other mail servers to be able to talk to you. Use

smtpd_tls_security_level = may # allow incoming encryption

instead of

smtpd_tls_security_level …
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