Table of Contents

Extract a compressed or archive image

Synopsis

  imgextract [--name <name>] [--timeout <timeout>] [--keep] <uri|image>

Examples

Download and extract a gzip-compressed initrd image

  imgextract http://192.168.0.1/images/initrd.gz

Description

Extract a single image from an archive image (which may be a compressed single-file archive).

A name for the extracted image can be specified using the --name option. If no name is specified, then a default name will be constructed by stripping any archive suffix (such as .gz for gzip archive images).

A download progress timeout can be specified (in milliseconds) using the --timeout option.

The original archive image will be automatically discarded unless the --keep option is specified.

Command status

Success The image was successfully extracted
Failure The image was not successfully extracted

See also

Build options

This command is available only when the build option IMAGE_ARCHIVE_CMD is enabled.

Notes

You can use the chain or kernel commands to execute a single-member archive image directly without using the imgextract command. For example, if you have a GZIP-compressed kernel image vmlinuz.gz: 

  #!ipxe
  kernel http://192.168.0.1/images/vmlinuz.gz
  initrd http://192.168.0.1/images/initrd.img
  boot