How do i encrypt and decrypt a file using the openssl aes-256-cbc cipher?

saolasosme

    -pbkdf2
           Use PBKDF2 algorithm with default iteration count unless otherwise
           specified.

To encrypt.

$ openssl enc -aes-256-cbc -pbkdf2 -in /tmp/sample_file  -out /tmp/sample_file.dat
enter aes-256-cbc encryption password:
Verifying - enter aes-256-cbc encryption password:
$

$ file /tmp/sample_file.dat
sample_file.dat: data

To decrypt.

$ openssl enc -aes-256-cbc -pbkdf2 -d -in sample_file.dat > sample_file.txt
enter aes-256-cbc decryption password:
$

$ file /tmp/sample_file.txt
sample_file.txt: ASCII text