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Technical tutorials, system architecture insights, performance tuning guides, and real-world debugging logs from over 22+ years building production web systems.

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Jul 29, 2014 • Server

Permissions 0755 for 'certificate.pem' are too open

You may experience bad permission error and ignoring operation while running a command with AWS. It's because a AWS are concern about your security and make sure the certificate are only accessible b...

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May 22, 2014 • Server

Using multiple AWS Accounts from command line

A common mistake like launching and creating an app to different account can be happen when anyone managing multiple AWS account at a time. You can easily manage that by configuring command line inte...

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