genfstab:tldr:829ad
The genfstab
command is used to generate an entry list of file systems for the /etc/fstab
file in Linux. The /etc/fstab
file contains information about the file systems to be mounted at system boot.
The -U
option is used to generate UUID-based filesystem labels for the entries in the /etc/fstab
file. UUIDs (Universally Unique Identifiers) are unique identifiers assigned to filesystems, making sure that filesystems are referenced consistently even if their device names change.
${path-to-mount_point}
is the placeholder for the actual path to the mount point on the file system that you want to generate an entry for. It should be replaced with the specific path, such as /
, /home
, or any other directory where you have mounted a file system.
The |
(pipe) symbol is used to redirect the output of the genfstab
command to the tee
command.
sudo tee -a /etc/fstab
is used to append (-a
) the output of the genfstab
command to the /etc/fstab
file. The sudo
command is used to run the subsequent command with administrative privileges, as editing the /etc/fstab
file usually requires root or superuser access.
In summary, this command generates an entry for the specified mount point using UUID-based filesystem labels and appends that entry to the /etc/fstab
file with administrative privileges.