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Questions tagged [mount]

Attaches a file system to a specified point in an existing filesystem hierarchy

254
votes
1answer
187k views

What is a bind mount?

What is a “bind mount”? How do I make one? What is it good for? I've been told to use a bind mount for something, but I don't understand what it is or how to use it.
160
votes
12answers
442k views

umount: device is busy. Why?

When running umount /path I get: umount: /path: device is busy. The filesystem is huge, so lsof +D /path is not a realistic option. lsof /path, lsof +f -- /path, and fuser /path all return nothing. ...
126
votes
4answers
529k views

How to get the complete and exact list of mounted filesystems in Linux?

I usually use mount to check which filesystems are mounted. I also know there is some connection between mount and /etc/mtab but I'm not sure about the details. After reading How to check if /proc/ is ...
90
votes
12answers
9k views

Why is Linux's filesystem designed as a single directory tree?

Can anyone explain why Linux is designed as a single directory tree? Whereas in Windows we can have multiple drives like C:\, and D:\, there is a single root in Unix. Any specific reason there?
72
votes
2answers
199k views

Mount cifs Network Drive: write permissions and chown

I have access to a cifs network drive. When I mount it under my OSX machine, I can read and write from and to it. When I mount the drive in ubuntu, using: sudo mount -t cifs -o username=${USER},...
71
votes
1answer
34k views

What happens when you 'mount over' an existing folder with contents?

Right now /tmp has some temporary files in it. When I mount my hard drive (/dev/sdc1) on top of /tmp, I can see the files on the hard drive. What happens to the actual content of /tmp when my hard ...
64
votes
9answers
19k views

Why do we need to mount on Linux?

I understand what mounting is in Linux, and I understand device files. However I do not understand WHY we need to mount. For example, as explained in the accepted answer of this question, using this ...
64
votes
6answers
56k views

Is it possible to mount a gzip compressed dd image on the fly?

I like create an image backup for the first time I'm backing up a system. After this first time I use rsync to do incremental backups. My usual image backup is as follows: Mount and zero out the ...
64
votes
7answers
596k views

How to mount a device in Linux?

I read some resources about the mount command for mounting devices on Linux, but none of them is clear enough (at least for me). On the whole this what most guides state: $ mount (lists all ...
63
votes
10answers
67k views

Mount Google Drive in Linux?

Now that Google Drive is available, how do we mount it to a Linux filesystem? Similar solutions exist for Amazon S3 and Rackspace Cloud Files.
59
votes
4answers
72k views

What is meant by mounting a device in Linux?

I've heard the term "mounting" when referring to devices in Linux. What is its actual meaning? How it handling now unlike older versions? I haven't done that manually via the command-line. Can you ...
55
votes
6answers
29k views

Different linux distros sharing the same /home folder?

What is the best way to share the same /home directories between different linux distribution? I mean, I want to have both, say, Fedora and Arch, and I want to find my files at home no matter which ...
55
votes
5answers
33k views

What is a better way to deal with server disconnects of sshfs mounts?

I have several directories mounted through sshfs. I sometimes get disconnects from the server (not configurable by me). I usually mount the directories like this sshfs user@server.example.com:/home/...
53
votes
13answers
255k views

mount.nfs: access denied by server while mounting on Ubuntu machines?

I have three machines in production - machineA 10.66.136.129 machineB 10.66.138.181 machineC 10.66.138.183 and all those machines have Ubuntu 12.04 installed in it and I have root access ...
50
votes
7answers
15k views

Why does mount require root privileges?

Why does Linux require that a user be root/using sudo/specifically authorized per mount in order to mount something? It seems like the decision as to whether to allow a user to mount something should ...
50
votes
3answers
17k views

understanding “mount” as a concept in the OS

I want to understand what mounting is. It is used in different contexts and situations and I can't find resources which: Describe the mount concept Explain the actions taken by the computer/OS/...
49
votes
5answers
6k views

Why does mount happen over an existing directory?

An existing directory is needed as a mount point. $ ls $ sudo mount /dev/sdb2 ./datadisk mount: mount point ./datadisk does not exist $ mkdir datadisk $ sudo mount /dev/sdb2 ./datadisk $ I find it ...
48
votes
4answers
36k views

Are there any drawbacks from using mount --bind as a substitute for symbolic links?

Symlinks have limitations in how functions like ls, mv, and cp can operate on them because unlike shell initiated commands like cd, these functions do not have information about how the user accessed ...
46
votes
3answers
156k views

How to umount a USB drive?

I want to know how to umount my USB drive via command line. I am using Ubuntu 12.04 LTS 32-bit.
41
votes
7answers
93k views

How to allow non-superusers to mount any filesystem?

Is it possible to allow some particular users (e.g. members of a group) to mount any filesystem without superuser privileges on Linux? Another question might have been "in what ways a user can harm a ...
41
votes
3answers
29k views

What is a “loop device” when mounting?

I am mounting an iso file, and looking at this tutorial. They use the command: $ mount -o loop disk1.iso /mnt/disk I'm trying to understand the use of -o loop. I have two questions: When I look at ...
40
votes
4answers
76k views

Determine what device a directory is located on

If I do # cd / # ln -s /home test # cd test # mount --bind $PWD /mnt the entry in /proc/mounts is /dev/sda2 /mnt ext4 rw,noatime,data=ordered 0 0 which is the device that is mounted to /home and ...
40
votes
4answers
92k views

Mounting a squashfs filesystem in read-write

I have a Clonezilla installation on a USB stick and I'd like to make some modifications to the operating system. Specifically, I'd like to insert a runnable script into /usr/sbin to make it easy to ...
39
votes
4answers
19k views

How can I mount a block device from one computer to another via the network as a block device?

Is it possible to export a block device such as a DVD or CDROM and make it so that it's mountable on another computer as a block device? NOTE: I'm not interested in doing this using NFS or Samba, I ...
36
votes
10answers
105k views

Check if folder is a mounted remote filesystem

What is the best way (reliable, portable, etc.) to check if a given folder is on a mounted remote (nfs) filesystem within a shell script? I am looking for a command that would look like: chk-remote-...
35
votes
2answers
59k views

Difference between 'sync' and 'async' mount options

What is the difference between sync and async mount options from the end-user point of view? Is file system mounted with one of these options works faster than if mounted with another one? Which ...
34
votes
4answers
154k views

Best way to mount remote folder

I have two RasberryPi running debian wheezy and I would like to mount a folder from computer A on computer B. What is the best (as in most efficient) way to do this? I can do it via SMB, but that is ...
33
votes
8answers
62k views

What is the fastest way to extract an ISO?

Currently I'm mounting an ISO to a (readonly) directory (using mount -o loop command) and then copying the contents to another normal directory. This takes lot of time as the ISO is large. Is this the ...
32
votes
2answers
31k views

What mount points exist on a typical Linux system?

I have 2 questions. During Linux installation we specify memory space for 2 mount points - root and swap. Are there any other mount points created without the users notice? Is this statement correct:...
31
votes
3answers
105k views

Run ./script.sh vs bash script.sh - permission denied

When I try to run ./script.sh I got Permission denied but when I run bash script.sh everything is fine. What did I do wrong?
31
votes
2answers
12k views

Where do the files go if you mount a drive to a folder that already contains files?

I just accidentally mounted a new drive to a folder that already contained files. I don't care about them and have them somewhere else, but that folder appears empty now. I'm curious what happened ...
31
votes
5answers
74k views

How to find the type of an img file and mount it?

I have to mount a .img file but I don't know what type of .img it is. How can I figure out what type of .img file it is? # mount -t auto -o ro,loop gmapsupp.img /mnt/iso/ mount: you must specify the ...
30
votes
5answers
120k views

How to determine if NFS mount is mounted as v3 or v4?

Red Hat 5/6 when I do mount it says type nfs, I would like to know how to determine version if it isn't listed in mount options or fstab. Please don't say remount it with the version option, I want ...
30
votes
2answers
15k views

Why doesn't mount respect the read only option for bind mounts?

On my Arch Linux system (Linux Kernel 3.14.2) bind mounts do not respect the read only option # mkdir test # mount --bind -o ro test/ /mnt # touch /mnt/foo creates the file /mnt/foo. The relevant ...
30
votes
7answers
10k views

What's the most “correct” mount point for a permanent NTFS partition?

I have an NTFS partition (containing a Windows installation from which I dual boot) that I would like to permanently mount from my Linux installation. Problem is, I can't figure out what the best/...
29
votes
6answers
39k views

How to mount an image file without root permission?

Can I mount a file system image without root permission? Normally I would do: mount -o loop DISK_IMAGE FOLDER Without using sudo or setting the suid on mount, is there any suitable way to do this? ...
29
votes
3answers
105k views

How to automatically mount an USB device on plugin-time on an already running system?

I know how to use /etc/fstab to automatically mount devices on boot or when doing sudo mount -a, which works perfectly fine. For example, here is my current line for my device UUID=B864-497A /media/...
28
votes
3answers
35k views

Does mount always require root privileges? [duplicate]

I was under the impression that any sort of call to mount requires root privileges. But recently I was told "You should instead create appropriate entries in /etc/fstab so that the filesystems can be ...
28
votes
1answer
8k views

systemd keeps unmounting a removable drive

I have following line in /etc/fstab: UUID=E0FD-F7F5 /mnt/zeno vfat noauto,utf8,user,rw,uid=1000,gid=1000,fmask=0113,dmask=0002 0 0 The partition is freshly created by gnome-disks under the ...
27
votes
4answers
46k views

How to mount a disk image from the command line?

I know how to mount a drive that has a corresponding device file in /dev, but I don't know how to do this for a disk image that does not represent a physical device and does not have an analogue in /...
26
votes
12answers
41k views

“mount: / is busy” when trying to mount as read-only so that I can run zerofree

I am trying to run zerofree on Ubuntu 11.04 so that I can compact the VirtualBox vdi image using: VBoxManage modifyhd Ubuntu.vdi --compact In order to run zerofree the disk image has be mounted as ...
26
votes
4answers
16k views

Where in “/” should extra permanent disks be mounted?

According to Wikipedia http://en.wikipedia.org/wiki/Unix_directory_structure http://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard extra disks should not be mounted in /mnt/ according to the ...
25
votes
3answers
20k views

How to re-mount a USB stick after unmounting from Nautilus without disconnecting it?

I find that in order to re-mount a USB stick, I have to physically disconnect it, and then re-connect it. How can I do this without such tiring physical action?
23
votes
3answers
8k views

Access to original contents of mount point

On my headless NAS I have sdf1 (a flash-card) mounted as / while /home is mounted from lv00 (an LVM volume backed by a software RAID). To be able to access the machine when the RAID fails, I have a ...
23
votes
2answers
2k views

How does Linux know which USB hard drive is which?

Currently I have Linux Mint installed on my PC with a USB hard drive partition mounted as /home. This is working well. If I install a second USB hard drive, is there any chance Linux will get ...
23
votes
2answers
9k views

per process private file system mount points

I was checking unshare command and according to it's man page, unshare - run program with some namespaces unshared from parent I also see there is a type of namespace listed as, mount namespace ...
22
votes
2answers
6k views

Mount an iso without root access?

Is it possible for a user without root access to mount an arbitrary iso? If so how?
21
votes
7answers
4k views

Why does Linux need to have both `/dev/cdrom` and `/media/cdrom`? [duplicate]

Inspired by this question. Why does Linux need both /dev/cdrom and /media/cdrom? Why not just access files on the cdrom through /dev/cdrom?
21
votes
6answers
40k views

How does a kernel mount the root partition?

My question is with regards to booting a Linux system from a separate /boot partition. If most configuration files are located on a separate / partition, how does the kernel correctly mount it at boot ...
21
votes
3answers
2k views

What is the difference between mount and mount -o loop

I have a iso file named ubuntu.iso. I can mount it with the command: mount ubuntu.iso /mnt. After mounting it, I can see it from the outout of the command df -h: /dev/loop0 825M 825M 0 100% ...