Encrypt Message String In Ubuntu 24.04 Terminal

How to encrypt / decrypt a message string in the Ubuntu 24.04 terminal using OpenSSL.
The process can be started with either "openssl cipher" or "openssl enc -cipher", but without the 'enc', as I have done, you can only use supported ciphers. Always use the -salt option. -iter is the number of iterations performed on the password to create the key and pbkdf2 has a default of 10000 iterations.