Check SSL certificate expiration on a remote SMTP server using openssl printf 'quit\n' | openssl s_client -servername <servername> -connect <ip/hostname>:<port> | openssl x509 -enddate -noout

Generate a Certificate Signing Request (CSR) in one command openssl req -new -newkey rsa:2048 -nodes -out <common name>.csr -keyout <common name>.key -subj "/C=SE/ST=/L=/O=<organization>/CN=<common name>" Send the generated .csr to the issuer Get back an issued certificate from the issuer Use the generated .key for the issued certificate

When you get ahead of yourself and stage a file that you’re not finished with. Undo with git restore --staged <filename>