block devices. The lsblk command reads the sysfs filesystem and udev db to gather information ... which is done by using /sys/dev/block . This sysfs block directory appeared in ker…device, then wdctl reads data from sysfs. In this case information about supported features (flags ... configured to take an action using sysfs or by --setpregovernor . -g , --setp…available transmit queues is reflected by sysfs entries within /sys/class/net/ /queues with nameext2, ext3, ext4, xfs, btrfs, vfat, sysfs, proc, nfs and cifs. The programs mountunmounted, except the proc, devfs, devpts, sysfs, rpc_pipefs and nfsd filesystems. This listthat cannot read the backing file from sysfs. The reference is readable only