Hi Vitaly,

On Wednesday, 17 July 2024 18:08:08 BST Vitaly Zdanevich wrote:

Hi, I did a chroot according to https://wiki.gentoo.org/index.php?title=Chroot

My script in the chroot folder:

```
mount --rbind /dev dev
mount --make-rslave dev
mount -t proc /proc proc
mount --rbind /sys sys
mount --make-rslave sys
mount --rbind /tmp tmp
mount --bind /run run

mount -o bind /var/db/repos/ var/db/repos/

chroot . /bin/bash

```

[snip ...]

The wiki and the Handbook, explain you need to have a mountpoint for the file system in which you are trying to chroot.

For example, the wiki page states:

mkdir /mnt/mychroot <== this is the mountpoint
cd /mnt/mychroot

or if you are trying to chroot on an existing installation on some block device, e.g. say it is partition /dev/sdb3, you would run:

mkdir /mnt/mychroot
mount /dev/sdb3 /mnt/mychroot

Consequently, the mount commands after you mount the OS partition and before you chroot become:

cd /mnt/mychroot
mount --rbind /dev /mnt/mychroot/dev
mount --make-rslave /mnt/mychroot/dev
mount -t proc /proc /mnt/mychroot/proc
mount --rbind /sys /mnt/mychroot/sys
mount --make-rslave /mnt/mychroot/sys
mount --rbind /tmp /mnt/mychroot/tmp
rmount --bind /run /mnt/mychroot/run

After the above you can chroot into the mounted filesystem:

chroot /mnt/mychroot /bin/bash


The same approach is followed in the Handbook for a new installation:

https://wiki.gentoo.org/wiki/Handbook:AMD64/Installation/ Base#Mounting_the_necessary_filesystems

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