How do I do 'mount --bind' in /etc/fstab?

Question

I'm trying to add mount --bind /proc/ /chroot/mysql/proc to /etc/fstab. How can I do this?

See the third paragraph of the section "The third field" in `man fstab`: "An entry swap denotes a file or partition to be used for swapping, cf. swapon(8). An entry ignore causes the line to be ignored. This is useful to show disk partitions which are currently unused. An entry none is useful for bind or move mounts." See also the previous section in `man fstab`, "The second field" that also mentions the use of "none". — Jonathan Ben-Avraham, Aug 07 '16 at 05:30
In case anyone's wondering, it looks like you can no longer do the same thing on Mac OS X: https://apple.stackexchange.com/questions/197029/how-do-you-mount-bind-a-local-directory — Sridhar Sarnobat, Aug 28 '19 at 20:28

score 242 · Accepted Answer · edited Jan 16 '20 at 23:23

242

The mount command accepts --bind or -o bind.

In the /etc/fstab file, you can use the following line:

/source /destination none defaults,bind 0 0

edited Jan 16 '20 at 23:23

Addison

answered Jul 16 '14 at 23:18

Matheus

8

Are you sure that the `defaults,bind` is necessary? I'm almost sure that `bind` would be enough. – Valerio Bozzolan Dec 31 '20 at 13:26
just in case of situations on boot, i like to add `nofail,x-systemd.device-timeout=2` to the options.... – Reishin Dec 13 '21 at 02:43
@Reishin So, it would be like this? : /source /destination none defaults,bind,nofail,x-systemd.device-timeout=2 0 0 ? – Raul Chiarella Apr 13 '22 at 21:25

score 114 · Answer 2 · answered Jul 16 '14 at 23:16

114

If I had a volume mounted at /media/3tb-vol1/Private/, and I wanted to bind it to /srv/Private I have a /etc/fstab like this.

/media/3tb-vol1/Private/ /srv/Private        none    bind

answered Jul 16 '14 at 23:16

Zoredache

2 Answers2