vgchange:tldr:740f9

This command is used to activate a particular volume group (VG) on a Linux system using the "vgchange" command with superuser privileges (sudo).

Here's a breakdown of the command:

• "sudo": It is a command in Unix-like operating systems that allows a user with the appropriate permissions to execute a command as the superuser or another user.
• "vgchange": It is a command used to change the attributes of a volume group in Logical Volume Manager (LVM) on Linux. It is typically used to activate or deactivate a volume group.
• "--activate": It is an option that specifies that the volume group should be activated.
• "${select}": It is a placeholder for a variable. The actual volume group that needs to be activated should be substituted in place of "${select}" when running the command.

Therefore, the complete command would be used to activate a specific volume group indicated by "${select}" with superuser privileges using the "vgchange" command.