Questions tagged [bind-mount]

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How to bind mount a directory in .bashrc without sudo privilege

NOTE: I'm working in WSL2, but my issues lies entirely within the Linux side of things. Please let me know if this is not the right place for this. I am needing to mount --bind a directory whenever ....
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15 views

How to prevent block device like hdisk to mount, using ibudev

It is possible to prevent USB device to be bound using libudev (udev interface in c). Now I want to prevent other devices like block devices to mount using it. Is it possible?? and how to do it?? ...
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25 views

Bind mount with mindepth option?

Is there a way to use something similar to the "mindepth" option of the find command with a bind mount ? Here is my directories and files structure : level 0 directory ├── level 1 directory ...
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1answer
25 views

In a user namespace as non-root, on a nosuid,nodev filesystem, why does a bind mount succeed but a remount fails?

In a Linux user namespace, as non-root, I bind mount /tmp/foo to itself. This succeeds. Then, I try to remount /tmp/foo to be read-only. If /tmp is mounted with nosuid or nodev, then the remount ...
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2answers
30 views

autofs mount local directory when nfs unavailable

I want to have my home directory be an NFS mount when it's available, or a local directory when it's not. Think of a laptop that I might want to take somewhere off of my normal network. What I have ...
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1answer
69 views

Linking a dropbox business acccount from “~/Dropbox (firm-name)” to “~/Dropbox”, with “mount --bind” or symlink or something else?

Been using my Dropbox account for years on a Lubuntu system. Now, my new company has made a Business account available to me. However, Dropbox insists that this folder should be called: ~/Dropbox (...
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13 views

docker mount bind resets after system reboot

I have a centos 7 vm I installed docker on. I used the typical installation, but the space allocated to /var/ was too little to hold very many images so I moved the docker folder somewhere else and ...
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70 views

Unable to chroot mount point?

# cd /mnt # file $(which chroot) /usr/bin/chroot: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64-ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=...
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156 views

What is the point of btrfs subvolumes?

The system administrator guide of the Btrfs wiki (here) says: A Btrfs subvolume can be thought of as a POSIX file namespace. I remember at first it saying that a subvolume is, as opposed to being ...
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1answer
25 views

Bind-mount and cryptsetup result in truncated root-path in /proc/self/mountinfo

I have an encrypted container containing an ext4 filesystem with a subdirectory which is bind-mounted at a later point in time. If I take look at /proc/self/mountinfo, the root-directory for the mount ...
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1answer
55 views

Determine available space on bind mount from inside a Docker container

I have an application inside a Docker container running Debian that has a feature that can import a lot of big files. The application stores the files in a folder on the host that is accessible via a ...
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Mount underlying volume, then bind-mount. Can I express this with systemd mount units somehow?

Suppose I have a volume commonly mounted into /media/username/LABEL. There is a folder on this volume, say named foobar which I'd like to bind-mount into another location, say /data/foobar. With ...
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230 views

Using bind mounts with Overlayfs

I am attempting to create a virtual mount using bind mounts in combination with OverlayFS. What would be most optimal is as follows: The root folder is bind-mounted to a new sub-folder, and used as ...
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1answer
32 views

bind mount: reproduce, fstab-style

How can I generate a bind-mount entry for fstab, given an existing (mounted) mountpoint? Neither findmnt nor mount produce a fstab-style entry. I suppose one can parse findmnt and figure out SOME of ...
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1answer
259 views

Why do bind mounts of device nodes break with EACCES in root of a tmpfs?

A common scenario for setting up a container/sandbox is wanting to create a minimal set of device nodes in a new tmpfs (rather than exposing the host /dev), and the only (unprivileged) way I know to ...
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14 views

How to extend an external storage device to a chrooted directory?

I run game servers that can generate a lot of data. So I purchased a couple of 12TB drives to store all the data. I've looked into how to link the storage of the drives to a location within a chrooted ...
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107 views

Bind mount but exclude a subdirectory

I'm using a chrooted Debian inside my router's base Linux OS. I want to move bind as many directories from the rootfs in the chroot as possible. All good so far. however, when it comes to the mnt ...
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37 views

unable to list/access files inside schroot from a `mount --bind`

I created the chroot with schroot following these instructions: https://wiki.winehq.org/Building_Wine#Chroot Then to test it I did: $ sudo mkdir /TestA $ echo abc |sudo tee /TestA/tst.txt $ cat /...
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1k views

How to map my host's to the container's user in docker-compose using the lebokus/docker-volume-bindfs plugin?

I have a php dev stack setup through Dockerfiles and docker-compose. I mount the source tree and composer vendor folder to the container. My host's local user philipp has id 1000 and my container uses ...
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1answer
111 views

Mounting successively in fstab: wait for partition to be mounted?

I mount successively two points using fstab in my linux system # Mounting apps drive UUID=c54ca7da-117d-4cb2-8897-019ba4f6f12d /media/user/apps ext4 defaults 0 2 # Mounting opt based on apps ...
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1answer
146 views

What does the 4th column (root) in /proc/…/mountinfo mean?

From the proc manual it names the 4th column of mountinfo as "root", and describes it as "the pathname of the directory in the filesystem which forms the root of this mount". But how to understand it? ...
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1answer
60 views

How to mount (bind) in a one-way writing fashion

In case you needed to know, I'm on a GNU+Linux distro with kernel version 5.5.5. So, suppose I have a directory named base. Further suppose this directory only contains one empty file, named a. ...
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110 views

Force changes from the outside to propagate into the container

I have a Docker container based on the gitlab-ce/latest image. In order to allow certain additional operations with Ansible while being minimally invasive, I opted to bind-mount over the /assets/...
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176 views

Unable to bind mount in Arch linux

I tried the following: sudo mount --bind /dev/sda1 /path/to/a/directory sudo mount -o bind /Dec/sda1 /path/to/a/directory both gives an error message : mount(2): system call failed: Not a ...
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1k views

Proxmox LXC storage share, permission problems

I'm totally new in these enviroments but I'm trying to learn. I installed proxmox on a single SSD, then attached one HDD(/dev/sdb) to the system for media storage. The basic idea was to create one ...
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42 views

Is it safe to move a directory that has been bind mounted?

Say we have a directory that we bind mount to another directory like so mount --bind directory mount-point Later on we move or rename the directory mv directory directory-2 What happens when a ...
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1answer
1k views

How can I make a device available inside a systemd-nspawn container with user namespacing?

I would like to mount an encrypted image file using cryptsetup inside a systemd-nspawn container. However, I get this error message: [root@container ~]# echo $key | cryptsetup -d - open luks.img luks ...
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1answer
113 views

does nosuid work on bind-mounts to suid partitions?

if i have /target mounted with suid and then make a bind-mount on /bound with mount -o bind,nosuid /target /bound, will nosuid take effect on /bound ? (imo it should take effect but i'd still like a ...
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353 views

Why is nofail ignored for bind mounts in /etc/fstab?

I have added the following line to /etc/fstab (don't ask for a reason, it is a completely separate discussion that does not affect this question): /nonexistent /bin none ro,bind,nofail 0 0 On boot I ...
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Is it possible for a filesystem/directory to be mounted as temporarily writable so that all changes made are discarded on unmounting?

Specifically my use case is that I am using ostree to deploy specific folders of the filesystem to some systems I manage. Because overwriting the original directories of the system is risky in case of ...
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1answer
490 views

Systemd BindPaths= not working

I am trying to test how the BindPaths= directive works on a Debian 8 system with systemd. Currently I have a basic unit file for a service: [Unit] Description="Simple Test Service" BindPaths=/path:/...
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113 views

How do I rmdir a directory after umount?

When I mount --bind a directory, chroot to a directory that contains it, and then unmount it, I am then unable to remove the directory. sudo mount --bind /usr/ /home/ubuntu/Code/conversations/jail/...
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155 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 ...
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1answer
1k 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 ...
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3answers
673 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 -...
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1answer
682 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:~$ ...
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1answer
4k 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 ...
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0answers
103 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. ...
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1answer
114 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/...
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1answer
106 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 ...
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1answer
2k 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 the ...
4
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1answer
3k 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 ...
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1answer
165 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 ...
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105 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 ...
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0answers
202 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 ...
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2answers
108 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
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1answer
325 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/...
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1answer
45 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 ...
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2answers
768 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 ...
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1answer
871 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=/...