Linux 18.3 Encryption

Linux 18.3 Encryption:

I have a new job where they are very rigid about how files need to be stored on hard drives that have been encrypted. I have a partition on a computer with Linux Mint on it and I want to encrypt that partition so I can use that exclusively for my job. What is the best way to encrypt it, preferably without reinstalling the operating system?

submitted by /u/aeneas1642
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