UMOUNT(8) UMOUNT(8) umount - umount -a [-dflnrv] [-t fstype] [-O ...] umount [-dflnrv] {|} umount -h|-V umount ( ) . . . '' - . umount - libc libc . . --lazy . -a --all /proc/self/mountinfo ( /etc/mtab ) proc devfs devpts sysfs rpc_pipefs nfsd. umount --types. -A --all-targets . ( UUID ). --recursive . /etc/mtab /proc/mounts. -c --no-canonicalize . stat(2) readlink(2). ( NFS ). . umount (non-root). mount(8). umount /sbin/umount.. -d --detach-loop (loop device) . mount(8) " " (autoclear) . --fake umount '' . /etc/mtab -n. -f --force ( NFS ). umount. readlink(2) stat(2) NFS umount. -i --internal-only /sbin/umount._ . . -l --lazy . . . umount -l umount . . -N --namespace ns umount ns. ns PID . umount /etc/fstab /etc/mtab ( /run/mount) umount(2) . umount(2). mount_namespaces(7) . -n --no-mtab /etc/mtab. -O --test-opts ... /etc/fstab. . no . -q --quiet " ". -R --recursive . . /proc/self/mountinfo. ( UUID) . 2.37 ( ). -r --read-only . -t --types ... . . no . umount (/proc/mounts) /etc/fstab ( "nfs4" "nfs"). -v --verbose . -h --help . -V --version . . fstab user . mount(8). 2.34 umount fuse . user= fstab. 2.35 umount libmount . suid (non-root). ( fuse ). (LOOP DEVICE) umount mount(8) /etc/mtab. "autoclear" ( losetup(8) ) --detach-loop losetup -d . (autoclear) 2.6.25. 3.7 " ". . udevadm settle umount. umount ( OR): 0 1 2 ( loop) 4 8 16 /etc/mtab 32 64 umount -a 0 ( ) 32 ( ) 64 ( ). 126 /sbin/umount. ( util-linux v2.41) : umount.suffix {|} [-flnrv] [-N _] [-t ._] suffix ( uhelper= helper= mtab). -t . : umount.fuse -t fuse.sshfs uhelper=_ ( ) /etc/mtab /etc/fstab ( udisks(1)). helper= mtab /sbin/umount. UID. /etc/mtab helper= libmount. umount(8). 126 execl(3). LIBMOUNT_FSTAB=<> fstab ( suid) LIBMOUNT_DEBUG=all libmount /etc/mtab ( /proc/mounts) /etc/fstab /proc/self/mountinfo . umount 6 AT&T. umount(2) losetup(8) mount_namespaces(7) mount(8) . umount util-linux . util-linux 2.42.1 2026-05-18 UMOUNT(8)