SMK is a single binary with multiple commands and optional parameters.

Command	Parameters	Example	Description
`reset`		`smk reset`	Erase all previous messages.
`clean`		`smk clean`	Keep only a few recent messages.
`unique`	`<priority> <text>`	`smk unique 2 "Device has rebooted."`	Add a new message. If an existing similar message already exist, will remove the old message. Priority is `0=high`, `1=medium`, `2=low`, anything else is `other`.
`add`	`<priority> <text>`	`smk add 3 "Service will restart."`	Add or update a message. If an existing similar message already exist, will incrememnt the duplicate message counter. Priority is `0=high`, `1=medium`, `2=low`, anything else is `other`.
`del`	`<id>\|<text>`	`smk del reboot`	Erase an existing message. The ID is 1-based. If instead text is given, then all messages with partial word match will be removed.
`get`	`<id>\|all\|recent`	`smk get recent`	Display a tab-delimited set of messages. The ID is 1-based.
`show`		`smk show`	Format all messages for console display.
`dump`		`smk dump`	Show the raw json file.

A cron job is automatically installed to regularly clean up the message file, as well as perform some checks when the device reboots. See /etc/cron.d/smk for details.

By adding a call to "smk show" in ~/.bashrc or /etc/profile.d/, messages can easily be shown immediately upon login. This screenshot also shows a customizable banner message from ccr_user in BBTools.