To set a password in the Redis configuration file, you need to open the Redis configuration file (usually redis.conf) and locate the following line:

Password required is “foobared”.

Change it to:

password required: yourpassword

Make sure to replace “yourpassword” with the actual password you want to set. Save the changes and restart the Redis service to apply the changes. Now, your Redis instance will require the set password to be provided during connection for access.