What happens after mounting filesystem from file? Example: I have rootfs.ext2 file which is located in data directory and mounted under /mnt directory mount rootfs.ext2 /mnt After removing rootfs.ext2 I still can use files under /mnt directory, cat file, run binaries, etc. rm -f rootfs.ext2 I was thinking tha…
Tag: mount
How does OCI/runc system path constraining work to prevent remounting such paths?
The background of my question is a set of test cases for my Linux-kernel Namespaces discovery Go package lxkns where I create a new child user namespace as well as a new child PID namespace inside a test container. I then need to remount /proc, otherwise I would see the wrong process information and cannot lo…
Docker bind source path does not exist even though it does
I have two ubuntu server VMs running on the same proxmox server. Both are running docker. I want to migrate one container from one of the VMs to the other. For that I need to attach a USB drive to the target VM which will be mounted inside the docker container. I mounted the drive exactly the same way in
Unable to bind mount a Windows folder in a Linux SQL Server docker image
I’m trying to run the docker image mcr.microsoft.com/mssql/server:2019-latest on a windows host. When running this command line, everything works fine: When I try to bind mount the /var/opt/mssql/data folder to access it’s content from my windows host, I get the following error: It looks like this…
C Linux Check free space in mount
When I running df -h I can see that in /dev I use 6M and the size is 40M , and Available size is 34M . How can I get this information with c code? Answer From here: Use the statvfs API: and the prototype of the statvfs is The results will be filled to the buf statvfs struct: The
Decrypt and mount an eCryptFS encrypted directory using an external C++ script in Linux
I want to decrypt and mount the default eCryptfs private directory by executing the “ecryptfs-mount-private” terminal command in C++ and providing the passphrase/password from the same C++ script. I have tried forking then exec the shell (/bin/sh) and opening pipes for I/O with sh but when I try t…
Is there any way to “try umount” before actually preform umount?
There can be several mount points under management in linux. I want to umount them all or don’t umount any. Since there are cases when linux cannot umount a device (like someone is on the mount point), I want to add a function to check all mount points and see if the devices can be umounted before I act…
Mount entry in fstab with go
Is there a way to mount a ssh device with Go using an entry in fstab where the mount options are defined. I have been trying syscall.Mount without success. 2018/01/20 11:31:07 operation not permitted exit status 1 A user mount using the fstab entry works fine. sshfs#jeanluc@<remote IP>:/home/jeanluc /ho…
How does `ip netns exec` command create mount namespace?
How does ip netns exec command create a mount namespace and prevent the changes from being propagated to other mount namespaces? Following is the from the man page of ip-netns: For applications that are aware of network namespaces, the convention is to look for global network configuration files first in /etc…
Shell Mount and check directionairy existence
Just looking for some help with my mounting shell script, wondering if anyone could advice me on how to make it check for the directory at the mount point exists and is empty, or is created by the script if it does not exist Answer Your use of grep will return any mountpoint that contains the string /myfilesy…