Creating and running shell scripts

Command summary (discussed as follows):

• mongo [<database>] --eval "command": Direct command execution
• mongo <JavaScript>: Runs the shell script specified

There are two ways in which you can run a shell script using mongo; issuing a direct (single) command using the --eval flag, or by creating and running a shell script.

Running a direct command

Often, you simply want to get status information on MongoDB, in which case the database is irrelevant. In this example, we use the --eval flag to run the command db.serverStatus():

In other cases, you might want to run periodic database queries from a cron job. Here is an example where we check for customers in the sweetscomplete...