Generate the mongodb-keyfile file in linux, ps: Need to set up user groups and permissions sudo chmod 600 mongodb-keyfile sudo chown 999 mongodb-keyfile
openssl rand -base64 666 > mongodb-keyfile
openssl: is a powerful, commercial-grade and full-featured toolkit for Transport Layer Security (TLS) and Secure Socket Layer (SSL) protocols rand: Generate random bytes of the specified length, here set to 666 -base64: code signing
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