sysfs(5) File Formats Manual sysfs(5) (NAME) sysfs - (DESCRIPTION) sysfs (pseudo-filesystem) . ( sysfs kobject .) sysfs . sysfs /sys (mount) . : mount -t sysfs sysfs /sys sysfs . . (Files and directories) /sys . /sys/block . /sys/devices . /sys/bus . : devices /sys/devices . drivers . /sys/class ( ). . /sys/devices . /sys/class/net (network namespace) . /sys/devices . /sys/dev block/ char/ . major-ID:minor-ID . sysfs . /sys/dev sysfs stat(2) ( ) . /sys/dev : $ stat -c "%t %T" /dev/null; 1 3 $ readlink /sys/dev/char/1\:3; ../../devices/virtual/mem/null $ ls -Fd /sys/devices/virtual/mem/null; /sys/devices/virtual/mem/null/ $ ls -d1 /sys/devices/virtual/mem/null/*; /sys/devices/virtual/mem/null/dev /sys/devices/virtual/mem/null/power/ /sys/devices/virtual/mem/null/subsystem@ /sys/devices/virtual/mem/null/uevent /sys/devices device . /sys/firmware . /sys/fs . . /sys/fs/cgroup tmpfs(5) cgroups(7) . /sys/fs/smackfs LSM SMACK . Documentation/admin-guide/LSM/Smack.rst . /sys/hypervisor [ ] /sys/kernel . /sys/kernel/cgroup/ cgroups(7) . /sys/kernel/debug/tracing tracefs ftrace . ( ftrace Documentation/trace/ftrace.rst .) /sys/kernel/mm . /sys/kernel/mm/hugepages (huge page) . ( hugepages-2048kB). ( ) . Documentation/admin-guide/mm/hugetlbpage.rst . /sys/module . . : coresize [ ] initsize [ ] initstate [ ] refcnt [ ] srcversion [ ] taint [ ] uevent [ ] version [ ] : drivers [ ] holders [ ] notes [ ] parameters . . sections (sections) . . [ ] /sys/power [ ] (STANDARDS) . (HISTORY) 2.6.0. (NOTES) . (SEE ALSO) proc(5), udev(7) P. Mochel (2005). The sysfs filesystem. Proceedings of the 2005 Ottawa Linux Symposium. Documentation/filesystems/sysfs.rst Documentation/ABI Documentation/*/sysfs.rst. Linux man-pages 6.19 2026-02-08 sysfs(5)