Rebuilding the Full Ramdisk Image

最新推荐文章于 2020-06-04 15:44:32 发布

xiaolei05

最新推荐文章于 2020-06-04 15:44:32 发布

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分类专栏： linux 文章标签： image permissions file build ext

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本文档详细介绍了如何从零开始构建一个用于特定目标系统的RAM磁盘映像。包括创建空目录、生成空白映像文件、使用ext2文件系统进行格式化、挂载文件系统并填充必要的文件等内容。

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Rebuilding the Full Ramdisk Image

The following steps describe the procedure to build the ramdisk for the target.

NOTE: It is recommended to perform these commands with root permissions, as it would be easier to manage special files, such as device nodes.

Create an empty directory where the file-system will be mounted:

host $ mkdir -p $HOME/ramdisk

Create an empty image file:

host $ dd if=/dev/zero of=ramdisk_file bs=40M count=1

Format the image with ext2 files-system

host $ mkfs.ext2 ramdisk_file 

You may see warning message like the following. Enter "y" to continue

mke2fs 1.35 (28-Feb-2004)
<ramdisk_file> is not a block special device
Proceed anyway? (y,n) y

Mount the filesystem image to be populated with files:

host $ sudo mount -o loop ramdisk_file $HOME/ramdisk

Now the filesystem can be populated with the required files. Untar the filesystem component archives as described in section Rebuilding NFS image

Now the filesystem is ready and can be saved for mounting on the target

host $ sudo umount $HOME/ramdisk
host $ gzip ramdisk_file