나는 다음을 수행하고 있습니다 :
mkdir /tmp/upper /tmp/work
mount -t overlay overlay -o lowerdir=/,upperdir=/tmp/upper,workdir=/tmp/work /
ls -l /etc/mtab
> lrwxrwxrwx 1 root root 19 27. Feb 09:16 /etc/mtab -> ../proc/self/mounts
cat /etc/mtab
> cat: /etc/mtab: file or directory not found
umount /
ls -l /etc/mtab
lrwxrwxrwx 1 root root 19 27. Feb 09:16 /etc/mtab -> ../proc/self/mounts
cat /etc/mtab
> correctly prints mtab...
제 질문은, 왜 이런 일이 일어나는 걸까요? overlayfs와 관련하여 내가 무엇을 놓치고 있습니까?