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What is a Symlinks in Linux?
A symlink (also called a symbolic link) is a type of file in Linux that points to another file or a folder on your computer. Symlinks are similar to shortcuts in Windows. Some people call symlinks “soft links” – a type of link in Linux/UNIX systems – as opposed to “hard links.”
What are Ubuntu Symlinks?
A symbolic link is a shortcut file for any directory or file. The symlink or soft link are the other names of the symbolic link. In Ubuntu, symbolic links work like a string that generates paths between various files and directories. It also ensures that files exist in consistent locations.
What is Dev Mapper LVM?
The device mapper is a framework provided by the Linux kernel for mapping physical block devices onto higher-level virtual block devices. It forms the foundation of the logical volume manager (LVM), software RAIDs and dm-crypt disk encryption, and offers additional features such as file system snapshots.
What is the logo for Ubuntu?
Circle of Friends
The Ubuntu logo is made up of the Ubuntu wordmark and the Ubuntu symbol. This symbol is called the ‘Circle of Friends’. It has been carefully re-drawn and positioned within a roundel for precision and added clarity. Wherever possible, the symbol should always appear as white on a flat orange-coloured background.
Where to find LVM symlinks in / Dev?
These days /dev is on tmpfs and is created from scratch each boot by udev. You can safely reboot and these links will come back. You should also find LVM symlinks to the /dev/dm-X nodes in the /dev/ directories, one directory for each volume group.
Where to find LVM devices under / Dev / mapper?
You should also find LVM symlinks to the /dev/dm-X nodes in the /dev/ directories, one directory for each volume group. However, those nodes re-created by vgscan –mknodes will also work fine, assuming they have the right major/minor numbers – and it’s a safe assumption they were created properly.
Is there a way to re-create symlinks in udev?
You can probably also get udev to re-create the symlinks using udevadm trigger with an appropriate match, testing with –dry-run until it is right. It hardly seems worth the effort though when a reboot will fix it too.
Why is Debian root unable to find LVM volume?
Unable to find LVM Volume. /dev/mapper/debian-root does not exist. And voilà, it rebooted nicely after this. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=616689 is relevant here. It’s to do with timeouts such that lvm root does not appear in time.