FSTAB(5) FSTAB(5) fstab - /etc/fstab fstab , . fstab ; ' - . fstab , fsck(8), mount(8) umount(8) fstab, . The file is not read by mount(8) only but often is used by many other tools and daemons, and proper functionality may require additional steps. For example, on systemd-based systems, it's recommended to use systemctl daemon-reload after fstab modification. Each filesystem is described on a separate line, with fields separated by tabs or spaces. The line is split into fields before being parsed. This means that any spaces or tabs within the fields must be escaped using \040 or \011, even within quoted strings (e.g. LABEL="foo\040bar"). Lines starting with '#' are comments. Blank lines are ignored. fstab: LABEL=t-home2 /home ext4 defaults,auto_da_alloc 0 2 (fs_spec). , loop, , ' ', . ( ) ( mknod(2)), , , - /dev/cdrom /dev/sdb7. NFS <>:<>, , knuth.aeb.nl:/. - , , , df(1). procfs - proc; tmpfs - mem, none tmpfs. , - udev sysfs, fstab. LABEL=<> UUID='. , , . , <> <>. ( LABEL , e2label(8), xfs_admin(8), fatlabel(8)). PARTUUID= PARTLABEL=. GUID Partition Table (GPT). mount(8), blkid(8) lsblk(8), . , mount(8) UUID . . FAT NTFS (., UUID="A40D-85E7" UUID="61DB7756DB7779B3"). (fs_file). () . swap, <>. , <<\040>> <<\011>>, . (fs_vfstype). . Linux : ext4, xfs, btrfs, f2fs, vfat, ntfs, hfsplus, tmpfs, sysfs, proc, iso9660, udf, squashfs, nfs, cifs . , mount(8). swap , ' , . swapon(8). none . . mount(8) umount(8) . '.subtype'. , 'fuse.sshfs'. , fstab (, 'sshfs#example.com' ). (fs_mntops). , . It is formatted as a comma-separated list of options and is optional for mount(8) or swapon(8). The usual convention is to use at least "defaults" keyword there. (ro rw, rw), ( ). mount(8) swapon(8). , , : defaults use default options. The default depends on the kernel and the filesystem. mount(8) does not have any hardcoded set of default options. The kernel default is usually rw, suid, dev, exec, auto, nouser, and async. noauto , mount -a (., ) user owner comment x-<> fstab nofail , . (fs_freq). dump(8) , . , ( ), . (fs_passno). fsck(8) , . fs_passno 1. fs_passno 2. , , , . , ( fsck), . , ( ), . /etc/fstab, fstab getmntent(3) libmount. ignore (3- ) libmount ( util-linux v2.22). This document describes handling of fstab by util-linux and libmount. For systemd, read systemd documentation. There are slight differences. fstab 4.0BSD. getmntent(3), fs(5), findmnt(8), mount(8), swapon(8) fstab util-linux, Linux . util-linux 2.41 2025-03-29 FSTAB(5)