Backup

• Back up the entire block device into S3

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Ceph

• Ceph disk upgrade procedure

• Ceph osd.x spilled over

• Ceph PGs not deep scrubbed in time

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Cryptography

• GPG Key sharing via WKD (Web Key Directory)

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Hardware

• Dell R720xd fan speed control

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Linux

• Don't break your Debian - Unstable repositories

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