Questions tagged [bind-mount]
The bind-mount tag has no usage guidance.
84
questions
0
votes
1answer
18 views
forwarding avahi-daemon socket to chroot
I have a raspberry pi 3b+ installed with raspbian stretch and I have installed an i386 chroot.
The problem is the CUPS server require avahi-daemon for printer discovery and I haven't been able to ...
3
votes
1answer
36 views
What is the purpose of bind mounting (rbind specifically) /sys?
I was going through the Gentoo Handbook in preparation for installing Gentoo on my system.
In the Chrooting section, these commands are given:
mount --rbind /sys /mnt/gentoo/sys
mount --make-rslave ...
4
votes
3answers
206 views
Why does bind mounting a file after unlink fail with ENOENT?
I do not understand why I get ENOENT when bind-mounting after unlink:
kduda@penguin:/tmp$ echo hello > a
kduda@penguin:/tmp$ touch b c
kduda@penguin:/tmp$ sudo unshare -m
root@penguin:/tmp# mount -...
0
votes
0answers
23 views
Creating bind mounts at Linux installation time
Generally, when we install a Linux distro (I'll use Ubuntu-like distro as an example, but can be any distro), we define partitions and mount points that will be applied to a disk, after we click on "...
3
votes
1answer
84 views
Why can I not bind a mount namespace to a file
I observe the following:
As unprivileged user in shell No 1:
user@box:~$ sysctl kernel.unprivileged_userns_clone
kernel.unprivileged_userns_clone = 1
user@box:~$ unshare --mount --user
nobody@box:~$ ...
3
votes
1answer
1k views
How to get mount information of host inside a docker container
I need the mountpoints of all disks attached to a host inside a docker container. The mount information is available in /proc/1/mounts file, but I cannot access that file on all OS.
When I run the ...
3
votes
0answers
58 views
Is linux mount propagation asynchronous to the mount call?
I have two processes in different mount namespaces. They have a shared directory bind mounted to /mnt/share. The "master" uses MS_SHARED propagation for the mount, while the "slave" uses MS_SLAVE.
...
0
votes
1answer
37 views
Data partition and IntelliJ IDEA external file sync speed
I recently reconfigured the filesystem on my laptop so I can share my data with a second Linux. The Linux used in this matter is Fedora 28, 64-bit.
My disks are now laid out like so:
/dev/sda:
/dev/...
2
votes
1answer
52 views
Mounting is slow after 4000 mounts
I have a need to create about 10,000 total bind mounts for various chroots. After about 3000-4000 mounts, it slows down significantly from 100/s to about 5-10/s. I'm assuming it's hitting some weird ...
0
votes
1answer
294 views
Mounting using alternate fstab file
I need to use an alternative fstab file for mounting a folder in another folder, like the command
mount --bind /folder1 /folder2
I tried the command
mount --fstab /pathToFile.fstab
as stated in ...
3
votes
1answer
387 views
/etc/fstab fails to bind mount on boot, but running mount -a works correctly
I'm running a modified WD MyCloud (Gen 1) NAS with Debian 8 (Jessie) installed on it.
Due to the nuances of the device, I can't resize the root partition, and am struggling with space on it.
To ...
-1
votes
1answer
74 views
Copy dir and its contents in RAM and backup on the original dir
I'd like to copy a dir and its contents in RAM, do my routines and periodically make some backups/sync on my original dir.
So if I have a dir mydir/ with 2 files:
$ ls mydir/
file1.tex file2.tex
I ...
1
vote
0answers
53 views
Bind mounts within bind mounts
I am trying to bind mount one file over another file, then remove the file that is now hidden from access. I'm trying to go about this as follows:
folder1# echo a > a
folder1# echo b > b
...
1
vote
0answers
74 views
What exactly happens behind a bind mount? (Linux 4.x)
From the answer to What is a bind mount?,
It is possible to unmount /some/where, in which case /else/where remains mounted.
I checked the output of mount after performing a bind mount. The ...
0
votes
2answers
42 views
Bind mounted /var to /raid5/var and CentOS fails to boot
System Background: I am running CentOS 7 in a VM (in VirtualBox) on a host computer running Windows 10. My /dev/sda is on an SSD and then I have three 1TB HDDs /dev/sdb, /dev/sdc, and /dev/sdd ...
3
votes
1answer
96 views
Why do repeated bind mounts create entries for the source directory?
Why does a repeated bind mount create multiple entries in /proc/mounts?
# md -p /mnt/test-mount/{source,target}
# mount --bind /mnt/test-mount/{source,target}
# grep test-mount /proc/mounts
/dev/...
1
vote
1answer
35 views
How to See Bound Folders and Release Them
This morning I noticed someone had stuck a USB Drive in the back of the server. (I'll have to end that practice later). For some reason CentOS 7 mounted that disk /dev/sdc1 under /run/media//. I also ...
0
votes
2answers
63 views
Calculating directory size without subdirectories bind-mounted from the same device
I want to calculate a directory size with all its subdirectories. But I had made some of the subdirectories to mount from a mount point. (using mount -B/--bind)
when I use du -hks the returned size ...
1
vote
1answer
367 views
How to tell systemd to create a bind mount when plugging in an automounted drive?
I have the following mount and automount units enabled for my external USB drive.
Mount Unit:
[Unit]
Description=Time Machine Drive Mount Service
[Mount]
What=/dev/disk/by-uuid/some-uuid
Where=/...
13
votes
1answer
856 views
Why can't I bind-mount “/” inside a user namespace?
Why doesn't this work?
$ unshare -rm mount --bind / /mnt
mount: /mnt: wrong fs type, bad option, bad superblock on /, missing codepage or helper program, or other error.
These work ok:
$ unshare -...
1
vote
0answers
46 views
Multiple network shares to single mount point?
How would I mount multiple network shares to single mount point?
Example
//10.50.154.6/data 42T 22T 21T 51% /mnt/data6
//10.50.154.7/data 8.1T 6.2T 1.9T 77% /mnt/data7
//10.50.154.8/...
0
votes
1answer
570 views
How to unmount a recursive bind mount - safely [duplicate]
Please take care that you have no unsaved work if you test this.
I ran this command as an experiment, but how can I undo it without rebooting?
# mount --rbind / /mnt
What I have tried
# umount /...
0
votes
1answer
115 views
Lazy unmount root jail drives
I have created a root jail containing rpm and yum (centos 7.5) to install some software on the original system.
Workflow
Mount sys, proc, dev to the root jail
Mount root of the original system "/" ...
0
votes
2answers
128 views
Making a bind-mount take effect only in the context of the current process and its descendants
I have 2 files: /MyDir/a and /MyDir/MySubDir/b and am running a bash script, to which I want to add code to make file /a point to file /b, but only in the current process and its descendants.
In ...
1
vote
1answer
419 views
Shadow bind mount in fstab
I have a custom, non-default Ubuntu installation, where I use my other Linux distro's boot manager (rEFInd). As such, I don't want Ubuntu to see my EFI partition, on the principle that it has no ...
0
votes
1answer
627 views
How to create a mount --bind when root does not have permission to access the source directory?
While trying to create a test environment using mount --bind I was surprised to find that it sometimes fails with permissions errors because root cannot access the source directory. This only appears ...
3
votes
1answer
369 views
How to exclude bind mounts from findmnt results list?
In a bash script I have the following lines:
TARGETS="$(findmnt -n -v -t btrfs -o TARGET --list)"
UUIDS="$(findmnt -n -v -t btrfs -o UUID --list)"
I run this script on some servers (running Arch ...
0
votes
0answers
174 views
How do I mount a file on top of a broken symbolic link?
In preparation of a chroot I'm doing an mount --bind /etc/resolv.conf ${MOUNTPOINT}/etc/resolv.conf. I need this because the ${MOUNTPOINT} contains a broken etc/resolv.conf.
However, mount is ...
5
votes
2answers
339 views
Meaning of statement that 'getcwd functions work correctly' in FreeBSD man page for mount_nullfs?
In FreeBSD, man mount_nullfs states that:
The primary differences between a virtual copy of the file system and a
symbolic link are that the getcwd(3) functions work correctly in the virtual
...
5
votes
1answer
1k views
bind mounting source to itself
What does mount --bind /dir1 /dir1 do? I've read https://www.kernel.org/doc/Documentation/filesystems/sharedsubtree.txt however it doesn't give a clear explanation. Looks like it is valid not only for ...
6
votes
1answer
620 views
why do Linux bind mounts disappear if the mount point's inode changes?
In summary: if you bind mount a file /tmp/a on top of /tmp/b in a new mount namespace, but then the inode of /tmp/b changes in the parent namespace, the bind mount disappears in the child namespace. I'...
0
votes
1answer
184 views
`umount -R` on bind mounts takes a non-neglible amount of time, why?
Why does umount -R take 0.2s to unmount this subtree of bind mounts? It only took 0.02s to mount the subtree, and 0.00s to change its propagation flags.
(I was looking at cloning the current set of ...
0
votes
1answer
15k views
Editing /etc/fstab to permanently bind mount directory
I wish to make the following mount permanent:
[michael@devserver ~]$ findmnt | grep public
└─/home/jail/home/public/repo /dev/mapper/centos-root[/home/michael/testing/gateway/repo] xfs ...
4
votes
2answers
2k views
Mount --bind in the same filesystem move files as in the same filesystem
If I mount --bind /a in /b and if I mv /a/bigfile /b/ it will take a lot of type (if the origin file is big). This will actually copy the file and then delete from the origin instead of simple update ...
1
vote
1answer
528 views
How to unmount a mountpoint with rbind and rslave?
Trying to use a chrooted system via
mount -B stage3 gentoo
mount -t sysfs none gentoo/sys
mount -t proc none gentoo/proc
mount -R /dev gentoo/dev
mount --make-rslave gentoo/dev
unshare --fork chroot ...
0
votes
0answers
278 views
how could the df command show the right mounts?
Under redhat 7, given this fstab where a "bind mount" across file systems is defined:
/dev/mapper/datab_vg-lv_db /appli/postgres xfs defaults 0 0
/appli/postgres/var /var/...
1
vote
2answers
108 views
Why are these mounts needed before updating initramfs?
After reading this answer on bind mount, I got the idea that a bind-mount in Linux is to reproduce part or an entire filesystem under another point in the directory tree.
So when we write the ...
9
votes
2answers
2k views
Why can't I create a `hardlink` to a file from a “mount --bind” directory on the same filesystem?
Original Problem
I have a file on one filesystem: /data/src/file
and I want to hard link it to: /home/user/proj/src/file
but /home is on one disk, and /data is on another so I get an error:
$ cd /...
1
vote
0answers
80 views
Making root being bind mounted
I have XUbuntu and Arch on a laptop, I'm sharing /boot partition between these distros mounting it on /mnt/boot and bind-mounting /mnt/boot/xubuntu or /mnt/boot/arch onto /boot; it works fine even ...
3
votes
5answers
1k views
Link 2 existing files
I have 2 existing files : abcd and xyz.
$ cat abcd
abcd
$ cat xyz
xyz
Now, when I try to softlink these files, I get this message :
ln: cannot create xyz: File exists
I do not want to use
ln -sf ...
2
votes
1answer
395 views
ls -la doesn't display correct permission for a mount --bind folder
Please read the following steps to understand my problem,
Execute following commands
mkdir ~/src
mkdir ~/destination
sudo mount ~/src ~/destination --bind -o ro
src folder has been bind mounted to ...
2
votes
1answer
649 views
Mounting two folders to corresponding directories within external volume?
I'm trying to mount /etc/folder and /var/folder to the same external volume UUID=xyz. This external volume already has subdirectories etc_folder and var_folder and has been formatted and available to ...
1
vote
1answer
2k views
Bind USB drive to home directory on demand
I was trying to attach specific USB drive to home folder of the user. I have installed vsftpd, but Kodi can't move on upper hierarchy. So he can't access /media folder, but FileZilla can.
My USB is ...
1
vote
0answers
321 views
Debian install, mounting /var /tmp /home in the same partition
I'm making a new Debian install. I have a SSD and an HDD. My idea was to put /home, /var and /tmp on the same partition in the HDD, and the rest (/) in a tiny partition in the SSD.
I followed this ...
4
votes
0answers
241 views
openvpn route-up script no mount permissions
I'm trying to mount a couple of nfs shares after my openvpn tunnel is up. Previously this worked on ubuntu 12.04 and ubuntu 14.04. I made a clean install with ubuntu 16.04 and can't get it to work.
...
3
votes
1answer
821 views
How can I automatically make ZFS filesyatems mount shared / rshared?
I have a number of ZFS sub-filesystems (so that I can granularly manage snapshots and ZFS options) like so:
tank/media
tank/media/pictures
tank/media/pictures/photos
tank/media/movies
tank/media/...
1
vote
1answer
145 views
/root as bind mount?
I am migrating my system from Debian 32 bit to Debian 64 bit. It is installed on /dev/sda2, so I created /dev/sda3, installed the new system there, synched installed packages and configuration files ...
1
vote
1answer
295 views
find: fts_read: Permission denied through mount_nullfs
I have the following set-up:
FreeBSD 10.3 with ZFS on root. A ZFS volume hierarchy (multiple volumes nested in each other, for lack of a better name) is duplicated using mount_nullfs in order to ...
10
votes
2answers
3k views
How is findmnt able to list bind mounts?
A lot of people keep saying that Linux does not keep information about bind mounts, so there is no way to get a list of them and their sources. Here are some examples:
from one of the the comments ...
2
votes
0answers
1k views
CentOS 7 - Can't mount /var/tmp as bind
I'm working on a freshly installed CentOS7 with LVM. I want to bind mount /var/tmp to /tmp and added the following to /etc/fstab.
/tmp /var/tmp none rw,nodev,noexec,nosuid,bind 0 0
...
