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cknife includes the following executables.

• cknifeaws - AWS wrappers.
• cknifemail - SMTP email sender.
• cknifemon - Daemon that sends heartbeat signals to a place of your choosing.
• cknifemysql - MySQL utilities.
• cknifepg - PostgreSQL utilities.
• cknifewcdir - Lines-of-code calculator.
• cknifedub - Spot directories that are particularly space-consuming.
• cknifenowtimestamp - Get a now() timestamp string.

Some tools are too simple to require a separate Wiki page, so their usage is summarized here.

Using cknifenowtimestamp

This tool just spits out the current time in a format that could be used in a backups file name.

> cknifenowtimestamp 
20181009214131

That's year 2018, month 10, day 09, 21:41:31 (military time). It's a call to Time.now.strftime("%Y%m%d%H%M%S").

Recipes

• Nightly Database Backups
• Load a Heroku PostgreSQL Database with Your Data

Other

You can read more to decide whether to bother with this thing.