crontab:tldr:0a708

This command is a cron job command, used to schedule and automate tasks on Unix-like operating systems.

The command is written in the following format:

30 2 * * Fri ${-absolute-path-to-script-sh}

Here's the breakdown of each component:

• 30: Specifies the exact minute when the task should be executed. In this case, it's set to execute at the 30th minute of the hour.
• 2: Specifies the hour when the task should be executed. In this case, it's set to execute at the 2nd hour of the day (2:30 AM).
• *: Represents a wildcard and in this context, it indicates that the task should be executed every day of the month.
• *: Represents another wildcard and here, it indicates that the task should be executed every month of the year.
• Fri: Specifies the day of the week when the task should be executed. In this case, it's set to execute only on Fridays.
• ${-absolute-path-to-script-sh}: This is the absolute path to the shell script file that should be executed as the task. The actual path should be provided here. The script file can be written in any shell scripting language, such as Bash.

In summary, this cron job command will execute a shell script file at 2:30 AM every Friday. The shell script file's path should be provided in place of ${-absolute-path-to-script-sh}.