The correct command to record a session in Linux is the "script" command.

Explanation:
The "script" command is used to record a session in Linux. It creates a typescript file that records all the input and output of the session. This can be useful for various purposes, such as documenting a troubleshooting session or reviewing a training session.

Usage:
To start recording a session, simply open a terminal and type the "script" command followed by the name of the output file. For example:
```
script session.log
```
This will start recording the session and save the output in the "session.log" file.

Recording Session:
Once the "script" command is executed, it starts recording everything that is being displayed on the terminal. This includes all the commands entered, their output, and any error messages. The recording continues until the user exits the terminal session.

Exiting Session:
To stop recording the session, simply type the "exit" command or press Ctrl+D. This will terminate the session and save the recorded output to the specified file.

Viewing Recorded Session:
To view the recorded session, open the output file in a text editor or use the "cat" command. For example:
```
cat session.log
```
This will display the contents of the recorded session on the terminal.

Benefits of Using "script" Command:
- It provides a detailed record of all the commands and their output during a session.
- It can be used for troubleshooting purposes to review what actions were taken.
- It can be used for training purposes to document a training session.
- It can be used as a reference to recreate a specific session in the future.

Overall, the "script" command is a useful tool in Linux for recording sessions and keeping a detailed record of all the input and output during a session.