remove extra mkfs.1
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man/man1/mkfs.1
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man/man1/mkfs.1
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.TH MKFS 1
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.SH NAME
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mkfs \- make a file system
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.SH SYNOPSIS
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\fBmkfs \fR[\fB\-Ldot\fR] [\fB\-B \fIblocksize\fR] [\fB\-i \fIinodes\fR] [\fB\-b \fIblocks\fR] \fIspecial \fIprototype\fR
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.br
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.de FL
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.TP
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\\fB\\$1\\fR
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\\$2
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..
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.de EX
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.TP 20
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\\fB\\$1\\fR
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# \\$2
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..
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.SH OPTIONS
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.TP 5
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.B \-L
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# Make a listing on standard output
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.TP 5
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.B \-d
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# Use mod time of \fImkfs\fR binary for all files
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.TP 5
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.B \-o
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# Use a drive other than 0 or 1 (safety precaution)
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.TP 5
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.B \-t
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# Do not test if file system fits on the medium
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.TP 5
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.B \-1
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# Make a version 1 file system (for backward compatibility)
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.TP 5
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.B \-i
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# Number of i-nodes (files)
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.TP 5
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.B \-B
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# Filesystem block size (in bytes)
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.TP 5
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.B \-b
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# Filesystem size (in blocks)
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.SH EXAMPLES
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.TP 20
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.B mkfs /dev/fd1 proto
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# Make a file system on \fI/dev/fd1\fR
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.TP 20
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.B mkfs -b 360 /dev/fd1
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# Make empty 360 block file system
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.TP 20
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.B mkfs /dev/fd1 360
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# Alternate way to specify the size
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.SH DESCRIPTION
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.PP
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.I Mkfs
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builds a file system and copies specified files to it.
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The prototype file tells which directories and files to copy to it.
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If the prototype file cannot be opened, and its name is just a string of
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digits, an empty file system will be made with the specified number of
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blocks.
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A sample prototype file follows.
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The text following the \fI#\fR sign in the example below is comment.
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In real prototype files, comments are not allowed.
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.PP
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.nf
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.ta 0.20i 0.70i 1.10i 3i 3.5i 4i
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boot # boot block file (ignored)
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360 63 # blocks and i-nodes
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d--755 1 1 # root directory
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bin d--755 \|2 1 # bin dir: mode (755), uid (2), gid (1)
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sh \|---755 2 1 /user/bin/shell # shell has mode \fIrwxr-xr-x\fP
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mv -u-755 2 1 /user/bin/mv # u = SETUID bit
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login -ug755 2 1 /user/bin/login # SETUID and SETGID
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$ # end of \fI/bin\fP
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dev d--755 2 1 # special files: tty (char), fd0 (block)
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tty c--777 2 1 4 0 # uid=2, gid=1, major=4, minor=0
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fd0 b--644 2 1 2 0 360 # uid, gid, major, minor, blocks
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$ # end of \fI/dev\fP
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user d--755 12 1 # user dir: mode (755), uid (12), gid (1)
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ast d--755 12 1 # \fI/user/ast\fP
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$ # \fI/user/ast\fP is empty
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$ # end of \fI/user\fP
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$ # end of root directory
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.PP
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.fi
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The first entry on each line (except the first 3 and the $ lines, which
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terminate directories) is the name the file or directory will get on the
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new file system.
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Next comes its mode, with the first character being
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\fB\-dbc\fR for regular files, directories, block special files and character
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special files, respectively.
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The next two characters are used to specify the SETUID and SETGID bits, as
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shown above.
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The last three characters of the mode are the
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.I rwx
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protection bits.
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.PP
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Following the mode are the uid and gid.
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For special files, the major and minor devices are needed.
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.PP
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The maximum size of a file system is 1 Gb for a version 2 file system,
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and 64 Mb for a version 1 file system. Alas the 8086
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.I fsck
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runs out of memory on a V2 file system larger than 128 Mb, so for the 8086
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version of
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\s-1MINIX 3\s-1
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you have to limit yourself to file systems of that size.
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.SH "SEE ALSO"
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.BR mkproto (1),
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.BR fsck (1),
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.BR mount (1).
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