Linux系统维护必备命令－－chroot

mount  /dev/sdx /mnt/gentoo
mount -t proc none /mnt/gentoo/proc/
或
mount -t proc proc /mnt/gentoo/proc/
mount --rbind /sys /mnt/gentoo/sys/
mount --rbind /dev /mnt/gentoo/dev/
mount --rbind /tmp /mnt/gentoo/tmp   (gentoo)
可选：mount  --rbind  /run /mnt/arch/run (arch)
DNS: cp /etc/resolv.conf etc/resolv.conf
chroot /mnt/gentoo /bin/bash
env-update     (gentoo)
source /etc/profile

Optionally, create a unique prompt to be able to differentiate your chroot environment:

export PS1="(chroot) $PS1"