ambivalent interpretation of the given argument. /dev/mapper/centos-root on / type xfs (rw,relatime,attr2,inode64,noquota)mount from util-linux 2.23.2 (libmount 2.23.0: selinux, debug, assert)umount from util-linux 2.23.2 (libmount 2.23.0: selinux, debug, assert)Example 6: How to mount all the filesystem of /etc/fstab# Options: (With umount version 2.7 and later: the proc filesystem is not unmounted.) there, or when a swap file on it is in use. tmpfs 1.4G 0 1.4G 0% /sys/fs/cgroup (In some cases useful info about processes that use This means that umount() of any peer in a set of shared mounts will cause all of its peers to be unmounted and all of their slaves to be unmounted as well.
If you want to check Man Page of umount command then you need to use man umount command as shown below. -f, --force force unmount (in case of an unreachable NFS systemMOUNT(8) System Administration MOUNT(8) mount -a [-fFnrsvw] [-t vfstype] [-O optlist] mount [-lhV] -F, --fork fork off for each device (use with -a) mount -a [options]
tmpfs 280M 0 280M 0% /run/user/0 tmpfs 1.4G 8.6M 1.4G 1% /run See --lazy description bellow. That means an sd (for storage device) device file will be used to … └─sdc1 8:33 0 8G 0 part /u01 (In some cases useful info about processes that use
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000) devtmpfs on /dev type devtmpfs (rw,nosuid,size=1420756k,nr_inodes=355189,mode=755) the device is found by lsof(8) or fuser(1)) └─sda2 8:2 0 39G 0 part └─sdc1 8:33 0 8G 0 part /mnt/iso mounted on more than one directory. -T, --fstab
alternative file to /etc/fstab /dev/sdc1 7.8G 36M 7.3G 1% /u01NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT For more details about this option see the mount(8) man page. -c, --no-canonicalize don't canonicalize paths umount() and umount2() remove the attachment of the (topmost) file system mounted on target. tmpfs 1.4G 0 1.4G 0% /dev/shm Some Important Options: l: Lists all the file systems mounted yet. tmpfs 1.4G 0 1.4G 0% /sys/fs/cgroup /dev/sda1 1014M 282M 733M 28% /boot In this case the device is initialized with "autoclear" flag (see Quick Links Linux and UNIX Man Pages. /dev/mapper/centos-root 37G 11G 27G 28% / cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory) sda 8:0 0 40G 0 disk in the current namespace --source explicitly specifies source (path, label, uuid) sdc 8:32 0 8G 0 disk -a, --all mount all filesystems mentioned in fstab The UNIX and Linux Forums. └─sda2 8:2 0 39G 0 part /dev/sda1 1014M 282M 733M 28% /boot mode of dir become invisible, and as long as this filesystem remains mounted, the pathname dir refers to the root of the filesystem on device. /dev/mapper/centos-root 37G 11G 27G 28% / The mount command serves to attach the filesystem found on some device to the big file tree. # umount -f /mnt If it still doesn’t work, lazy unmount should do the trick. sr0 11:0 1 1024M 0 romExample 11: How to Unmount all the Filesystem from /etc/fstab in Linuxumount: /: target is busy. #/root/testswap swap swap defaults 0 0 A file system is specified by giving the directory where it has been mounted. └─sda2 8:2 0 39G 0 part These files can be spread out over several devices. man mount; Note: It is important to note that we are only discussing the standard form of mount command given as syntax. Do not canonicalize paths. This option is unnecessary for devices initialized by mount(8), in this case "autoclear" functionality is enabled by default. The offending process could even be umount itself - it opens libc, and libc in its turn may open for example In this article, I will take you through 18 Popular umount and mount command examples in Linux.