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How to configure the Linux kernel/usr

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Howto configure the Linux kernel / usr


Configuration for initramfs


  • Option: INITRAMFS_SOURCE
    • Kernel Versions: 2.6.15.6 ...

"Initramfs source file(s)"

    • default ""
      This can be either a single cpio archive with a .cpio suffix or a space-separated list of directories and files for building the initramfs image. A cpio archive should contain a filesystem archive to be used as an initramfs image. Directories should contain a filesystem layout to be included in the initramfs image. Files should contain entries according to the format described by the usr/gen_init_cpio program in the kernel tree.
      When multiple directories and files are specified then the initramfs image will be the aggregate of all of them.
      See <file:Documentation/early-userspace/README for more details.
      If you are not sure, leave it blank.


  • Option: INITRAMFS_ROOT_UID
    • Kernel Versions: 2.6.15.6 ...

"User ID to map to 0 (user root)"

    • depends on INITRAMFS_SOURCE!=""
    • default "0"
      This setting is only meaningful if the INITRAMFS_SOURCE is contains a directory. Setting this user ID (UID) to something other than "0" will cause all files owned by that UID to be owned by user root in the initial ramdisk image.
      If you are not sure, leave it set to "0".


  • Option: INITRAMFS_ROOT_GID
    • Kernel Versions: 2.6.15.6 ...

"Group ID to map to 0 (group root)"

    • depends on INITRAMFS_SOURCE!=""
    • default "0"
      This setting is only meaningful if the INITRAMFS_SOURCE is contains a directory. Setting this group ID (GID) to something other than "0" will cause all files owned by that GID to be owned by group root in the initial ramdisk image.
      If you are not sure, leave it set to "0".


Linux Kernel Configuration

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