UMOUNT(8) UMOUNT(8) (NAME) umount - (SYNOPSIS) umount -a [-dflnrv] [-t fstype] [-O option...] umount [-dflnrv] {directory|device} umount -h|-V (DESCRIPTION) umount . . . <<>> ('busy') - (swap) . umount - libc libc (locale) . . --lazy . (OPTIONS) -a, --all /proc/self/mountinfo ( /etc/mtab ) proc devfs devpts sysfs rpc_pipefs nfsd. --types umount . -A, --all-targets . ( UUID ) . --recursive . /etc/mtab (symlink) /proc/mounts . -c, --no-canonicalize . stat(2) readlink(2) . ( NFS ). . umount . mount(8) . umount /sbin/umount.type . -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.filesystem . . -l, --lazy (Lazy unmount). . (submounts) (reboot) . 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 option... /etc/fstab . . no . -q, --quiet << >> ("not mounted"). -R, --recursive . . /proc/self/mountinfo . ( UUID) . . ( ) . -r, --read-only (remount) . -t, --types type... (type) . . no . umount (/proc/mounts) /etc/fstab ( "nfs4" "nfs"). -v, --verbose . -h, --help . -V, --version . (NON-SUPERUSER UMOUNTS) . fstab user . mount(8) . . umount fuse . user= fstab . . umount libmount . suid . ( fuse ) . (LOOP DEVICE) umount (loop device) mount(8) /etc/mtab . "autoclear" ( losetup(8) ) --detach-loop losetup -d device . autoclear .. . . << >> (lazy device destruction) . autoclear . umount udevadm settle . (EXIT STATUS) umount ( OR ): 0 1 2 ( fork ) 4 mount 8 16 /etc/mtab 32 64 umount -a 0 ( ) 32 ( ) 64 ( ) . 126 /sbin/umount. ( util-linux .) (EXTERNAL HELPERS) : umount.suffix {directory|device} [-flnrv] [-N namespace] [-t type.subtype] suffix ( uhelper= helper= mtab). -t (subtype) . : umount.fuse -t fuse.sshfs uhelper=something ( ) /etc/mtab /etc/fstab ( udisks(1) ). helper=type mtab UID /sbin/umount.type . /etc/mtab helper= libmount . umount(8) . 126 execl() . (ENVIRONMENT) LIBMOUNT_FSTAB= fstab ( suid ) LIBMOUNT_DEBUG=all libmount (FILES) /etc/mtab ( /proc/mounts ) /etc/fstab /proc/self/mountinfo . (HISTORY) umount AT&T . (SEE ALSO) umount(2), losetup(8), mount_namespaces(7), mount(8) (REPORTING BUGS) util- linux issues . . (AVAILABILITY) umount util-linux Linux Kernel Archive . . util-linux UMOUNT(8)