asciinema:tldr:dbd69

The command "asciinema rec -i ${2-5}" is used to start recording a terminal session using the asciinema tool.

Here is a breakdown of the different components of the command:

• "asciinema rec": This is the base command used to start the recording. "rec" stands for "record".

• "-i": This is an option flag used to specify the idle time before starting the recording. The "-i" flag indicates that the idle time will be provided.

• "${2-5}": This is a parameter that is used to define the idle time in seconds before starting the recording.

The "${2-5}" expression refers to a parameter expansion in the Bash shell. It represents a range of values from the second positional argument ($2) to the fifth positional argument ($5). The positional arguments are values provided in the command line when executing the command.

For example, if you execute the command as follows: asciinema rec -i 10

The recording will start after an idle time of 10 seconds.

If you execute the command as follows: asciinema rec -i 2-5

The recording will start after an idle time ranging from 2 seconds to 5 seconds.