vgchange – Modify Volume Group Attributes

The vgchange command is used to modify the attributes of a volume group. It can be used to activate or deactivate a volume group, change its attributes, and resize it. This command is part of the LVM (Logical Volume Manager) system, which allows for the creation and management of logical volumes.

Overview

The syntax for the vgchange command is as follows:

vgchange [options] [VG...]

Where options are the various options that can be used with the command, and VG is the volume group to modify. If no volume group is specified, the command will modify all volume groups.

To activate a volume group, use the -a option:

vgchange -a y VG

This will activate the volume group VG. To deactivate a volume group, use the -a option with a value of n:

vgchange -a n VG

To resize a volume group, use the -s option followed by the new size:

vgchange -s 10G VG

This will resize the volume group VG to 10 gigabytes.

Additional options include the ability to change the maximum number of logical volumes allowed in a volume group (-l), change the maximum number of physical volumes allowed in a volume group (-p), and change the allocation policy (-c).

Options

The following table lists the available options for the vgchange command:

Troubleshooting Tips

If you receive an error message when trying to modify a volume group, make sure that the volume group is not already in use. If it is, you may need to deactivate it first before making any changes.

If you are having trouble with the syntax of the vgchange command, refer to the man page for more information:

man vgchange

Notes

• The vgchange command requires root privileges to run.
• Be careful when modifying volume groups, as any changes made can have a significant impact on the system.
• Always make sure to have a backup of any important data before making any changes to a volume group.