# Regular Meeting (2021.12.22)

* ~~User Mount-- The [*guestmount (libguestfs)*](https://en.wikipedia.org/wiki/Libguestfs)~~
* *initrd* vs *initramfs (Linux Kernel officical doc)*

## *guestmount*

* ~~*libguestfs* does not require root permissions. (See wiki)~~
* ~~Lots of [dependency](https://archlinux.org/packages/community/x86_64/libguestfs/) (e.g. FUSE, etc.)~~
* ~~High cost of resource: *Virtualization* (recognize as *lightweight Virtualbox/Vmware*)~~

Unfortunatelly, can't start-up.
It seems only work with `os-image`

## *initrd* vs *initramfs*

[Refer to here](https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18841976/Prepare+boot+image)

[kernel-doc officical site](https://www.kernel.org/doc/Documentation/filesystems/ramfs-rootfs-initramfs.txt)

* Device type
* initrd : general /dev device -> high cost on OS-Swap between HD and RAM
* initramfs : ram device, similar to /run, /sys
* How to mount root-dev
* initrd: `find -xdev / -exec rm '{}' ';'`
* initramfs: `cd /newmount; mount --move . /; chroot .`

###### tags: `Regular Meeting` `DeWei`