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Questions tagged [mount]

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

295
votes
1answer
218k 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.
63
votes
4answers
82k 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 ...
32
votes
2answers
32k 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:...
28
votes
3answers
10k 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 ...
58
votes
6answers
31k 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 ...
32
votes
2answers
13k 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 ...
24
votes
2answers
10k 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
5answers
24k views

List only bind mounts

Rather than using mount | grep, I'd like to use mount -l -t bind, but that doesn't work, and -t none shows all mounts.
8
votes
3answers
11k views

Automount USB drives with no GUI requirement (halevt replacement)

For minimal installations of Debian, I have been using halevt to enable automounting of USB drives. Halevt is reliable and requires no configuration aside from installing the package. Now, halevt has ...
6
votes
1answer
495 views

du results on filesystem inconsistent with df

What explains the discrepancy in usage (82 GB vs 13 GB) that I see below? Using df: $ df -h / Filesystem Size Used Avail Use% Mounted on /dev/sda2 96G 82G 9.9G 90% / ...
139
votes
4answers
592k 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 ...
25
votes
6answers
43k 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 ...
84
votes
2answers
226k 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},...
90
votes
12answers
10k 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?
47
votes
3answers
34k 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 ...
44
votes
4answers
89k 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 ...
50
votes
3answers
19k views

understanding “mount” as a concept in the OS [duplicate]

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/...
33
votes
3answers
17k 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 ...
34
votes
6answers
45k 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? ...
15
votes
3answers
5k views

mount is not executed when called by udev

I tried to create some udev rules to mount and unmount my USB flash drives; the rules for the moment are very simple: ACTION=="add",KERNEL=="sd[b-z]",RUN+="/root/scripts/plug_flash_drive.sh %k" ...
6
votes
2answers
2k views

mount options shown in /proc/mounts

IIRC then the mount options shown in /proc/mounts have changed. Some time ago acl and user_xattr were shown, now it seems that only noacl and nouser_xattr are shown if these features are turned off. ...
12
votes
4answers
2k views

Trouble with understanding the concept of mounting

Having read both What is meant by mounting a device in Linux? and understanding "mount" as a concept in the OS, I have a problem where it is stated that All accessible storage must have ...
66
votes
6answers
59k 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 ...
40
votes
4answers
102k 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 ...
43
votes
7answers
104k 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 ...
52
votes
7answers
16k 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 ...
25
votes
6answers
56k views

Is there a command to see where a disk is mounted?

Is there a simple command that takes a disk's device node as input, and tells me where (and whether) that disk is mounted? Is it possible to get the mount point by itself, so I can pass it to another ...
18
votes
3answers
20k views

How do I mount an `img` created with /bin/dd of a hard drive?

I used dd to backup a 80GB drive dd if=/dev/sdb of=~/sdb.img Now I need to access some files on that drive, but I don't want to copy the ".img" back over the drive. mount ~/sdb.img /mnt/sdb doesn'...
21
votes
7answers
4k views

Showing only “interesting” mount points / filtering non interesting types

I used mount to show mounted drives, I don't want to see the not so interesting ones (i.e. non-physical). So I used to have a script mnt that did: mount | grep -Ev 'type (proc|sysfs|tmpfs|devpts) ' ...
8
votes
2answers
6k views

Udev rule to mount disk does not work

I have the following content in in /etc/udev/rules.d/81-external-disk.rules: ENV{ID_FS_UUID}=="6826692e-79f4-4423-8467-cef4d5e840c5", RUN{program}+="/bin/mount -o nofail,x-systemd.device-timeout=1 -t ...
20
votes
3answers
32k views

Why does fstab use UUID instead of the actual file system name?

For example, this is the first line of my /etc/fstab: UUID=050e1e34-39e6-4072-a03e-ae0bf90ba13a / ext4 errors=remount-ro 0 1 And here's the output of df -h command (reporting free ...
14
votes
4answers
16k views

mount info for current directory

I can do df . to get some of the info on the mount that the current directory is in, and I can get all the info I want from mount, but get to much info (info about other mounts). I can grep it down, ...
10
votes
1answer
2k views

Unmount a rbind mount without affecting the original mount

Asked on serverfault but didn't get enough attention, so reposted here, with the hope some people here know the answer. There is another question discussing about umounting rbind mounts, but the ...
21
votes
3answers
60k views

How does _netdev mount option in /etc/fstab work?

I'd like to know what is the exact mechanism (implementation) used to defer mounting until after network interface is up when one uses _netdev option in /etc/fstab? Does systemd alter this behavior? ...
20
votes
6answers
133k views

How to check whether a particular directory is mounted? [duplicate]

How to check a particular directory is mounted on the Linux machine. For instance there is a folder named test, I want to check if it is mounted or not.
12
votes
2answers
3k views

When was `relatime` made the default?

What is the first Linux kernel release to set relatime as the default mount option?
6
votes
3answers
1k views

How to get my USB key to auto mount

I'm currently working in a command line only environment. When I plug my USB key in, I see a new device file in /dev: ... sdi sdi1 ... If I simply sudo mount /dev/sdi1 /media/tmp, and umount it ...
8
votes
1answer
7k views

How to set default auto mount options for removable media?

I have quite a bit of removable media (flash drives, external hard drives, etc) that I want to adjust auto mount options for. How does one do this? Is there something similar to /etc/fstab?
2
votes
3answers
17k views

how should I mount my ext4 partition in fstab

so that it appears in Thunar's sidebar under the name 'Schijf-2'? I am running linux mint13 xfce and this has been a headache causer for the last couple of days. the UUID of this partition is: this ...
165
votes
12answers
469k 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. ...
37
votes
4answers
169k 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 ...
66
votes
9answers
21k 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 ...
65
votes
10answers
69k 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.
57
votes
14answers
292k 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 ...
52
votes
4answers
38k 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 ...
34
votes
5answers
81k 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 ...
17
votes
6answers
41k views

How to mount removable media in /media/<LABEL> automatically when inserted, without any desktop environment?

I have a Debian sid system (Wheezy) (and same for arch), without any desktop environment (and no Xorg at all). I can mount my SD-cards, USB sticks, external HDD by label into a specified directory in ...
15
votes
4answers
99k views

How to mount/recover data on a disk that was part of a mdadm raid 1 on another machine?

Some background The disk itself was "worked on" by a friend and is said to be still intact, undamaged and still mountable/recoverable The disk was part of a software raid 1 on Ubuntu 12.04 The other ...
30
votes
4answers
19k 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 ...
16
votes
1answer
8k views

Why is “nodev” in /etc/fstab so important? How can character devices be used for hacking?

I am learning about linux security and struggling to understand why a USB stick with a character device on it is potentially dangerous. If I have a USB stick with a bash executable that has setuid ...