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1.1 ! root 1: .TH FSTAB 5 ! 2: .CT 2 sa ! 3: .SH NAME ! 4: fstab, mtab \- information about file systems ! 5: .SH SYNOPSIS ! 6: .B #include <fstab.h> ! 7: .SH DESCRIPTION ! 8: The file ! 9: .F /etc/fstab ! 10: describes the normal configuration of file systems. ! 11: It guides the default operation of ! 12: .I mount, ! 13: .I umount, ! 14: .I swapon, ! 15: and ! 16: .IR fsck (8). ! 17: The order of records in ! 18: .F /etc/fstab ! 19: is important. ! 20: .PP ! 21: Each line of the file describes one file system. ! 22: Fields separated by colons specify ! 23: .IP ! 24: pathname of block device or other mounted object ! 25: .br ! 26: pathname of mount point ! 27: .br ! 28: file system type number ! 29: .br ! 30: integer mount flags ! 31: .br ! 32: pass number for checking; see ! 33: .IR fsck (8) ! 34: .PP ! 35: File system type numbers ! 36: and flags are listed in ! 37: .IR fmount (2). ! 38: .PP ! 39: Two special non-numeric file system types ! 40: signify things that aren't file systems: ! 41: .L xx ! 42: causes the line to be ignored, ! 43: .L sw ! 44: signifies a swap device. ! 45: .PP ! 46: Use ! 47: .IR getfsent (3) ! 48: to read data from ! 49: .LR /etc/fstab . ! 50: .PP ! 51: The file ! 52: .F /etc/mtab ! 53: lists file systems currently mounted. ! 54: Each entry is a structure of the form ! 55: .PP ! 56: .nf ! 57: .ft L ! 58: .ta 8n +27n ! 59: #define FSNMLG 32 ! 60: ! 61: struct mtab { ! 62: char file[FSNMLG];\fR mount point\fP ! 63: char spec[FSNMLG-1];\fR mounted object\fP ! 64: char type;\fR file system type\fP ! 65: }; ! 66: .ft R ! 67: .fi ! 68: .SH EXAMPLES ! 69: A simple ! 70: .I fstab. ! 71: .IP ! 72: .EX ! 73: /dev/ra00:/:0:0:1 ! 74: /dev/ra02:/usr:0:0:2 ! 75: /dev/ra05:/tmp:0:0:3 ! 76: /dev/ra10:/ra10:0:1:1 ! 77: /dev/ra11::sw:0:0 ! 78: /dev/ra15:/ra15:0:1:3 ! 79: /dev/null:/proc:2:0:0 ! 80: .EE ! 81: .SH FILES ! 82: .F /etc/fstab ! 83: .br ! 84: .F /etc/mtab ! 85: .SH SEE ALSO ! 86: .IR fmount (2), ! 87: .IR getfsent (3), ! 88: .IR mount (8) ! 89: .SH BUGS ! 90: Swap areas are not file systems, ! 91: and should not be described in ! 92: .IR fstab . ! 93: .br ! 94: For compatibility with old programs and habits, ! 95: two deprecated magic file system types survive: ! 96: .L rw ! 97: means `type 0, flag 0' ! 98: (a disk file system, mounted for reading and writing); ! 99: .L ro ! 100: means `type 0, flag 1' ! 101: (a disk file system, mounted read-only). ! 102: .br ! 103: Only file systems mounted with ! 104: .IR mount (8) ! 105: are listed in ! 106: .IR mtab .
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