qemu-img:tldr:8bc51

The command "qemu-img resize ${image_name-img} ${gigabytes}G" is used to resize a disk image file in the QEMU (Quick Emulator) hypervisor.

Here's a breakdown of the command components:

• "${image_name-img}" is a placeholder representing the name and path of the disk image file you want to resize. You need to replace it with the actual name and path of your image file.
• "${gigabytes}" is also a placeholder representing the desired size for the resized image file. You need to replace it with the actual size you want, specified in gigabytes.

The resize command instructs qemu-img, a command-line tool for manipulating disk images, to increase or decrease the size of the specified image file.

Example usage: Let's say you have an Ubuntu disk image file named "ubuntu.qcow2" located in your /home/user/images directory, and you want to resize it to 20 gigabytes. The command would be:

qemu-img resize /home/user/images/ubuntu.qcow2 20G

After executing the command, QEMU will modify the disk image file to the desired size, effectively resizing it.