date:show:default

The command "date -u +"%Y-%m-%d %H:%M:%S"" is used to display the current date and time in a specific format.

Here is a breakdown of the command:

• "date": This is the command to display the date and time.
• "-u": It is an option that stands for "universal" and displays the date and time in Coordinated Universal Time (UTC), which is a standardized time.
• "+": It is used to specify the format in which the date and time should be displayed.

"%Y-%m-%d %H:%M:%S": These are formatting characters that define the desired format for the date and time display.

• "%Y": It represents the four-digit year.
• "%m": It represents the two-digit month (01-12).
• "%d": It represents the two-digit day of the month (01-31).
• "%H": It represents the two-digit hour in 24-hour format (00-23).
• "%M": It represents the two-digit minute (00-59).
• "%S": It represents the two-digit second (00-59).

So, when you execute the command "date -u +"%Y-%m-%d %H:%M:%S"", it will output the current date and time in the format "YYYY-MM-DD HH:MM:SS" in UTC. For example, it may display something like "2022-07-19 15:30:45".