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.\" @(#)tunefs.8 8.2 (Berkeley) 12/11/93 |
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.\" @(#)tunefs.8 8.2 (Berkeley) 12/11/93 |
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.\" $FreeBSD$ |
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.\" $FreeBSD$ |
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.\" |
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.\" |
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.Dd January 29, 2019 |
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.Dd October 15, 2021 |
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.Dt TUNEFS 8 |
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.Dt TUNEFS 8 |
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.Os |
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.Os |
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.Sh NAME |
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.Sh NAME |
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.Op Fl s Ar avgfpdir |
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.Op Fl s Ar avgfpdir |
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.Op Fl S Ar size |
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.Op Fl S Ar size |
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.Op Fl t Cm enable | disable |
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.Op Fl t Cm enable | disable |
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.Ar special | filesystem |
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.Ar filesystem |
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.Sh DESCRIPTION |
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.Sh DESCRIPTION |
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The |
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The |
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.Nm |
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.Nm |
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utility is designed to change the dynamic parameters of a UFS file system |
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utility is designed to change the dynamic parameters of a UFS file system |
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which affect the layout policies. |
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which affect the layout policies. |
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.Pp |
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The file system to be operated on is a block device special name, |
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a file system path, or a UFS file system image as a regular file |
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.Pq Ar filesystem . |
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.Pp |
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.Nm |
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searches for a valid filesystem in several places. |
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First it will examine |
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.Ar filesystem |
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as a file, a file system path, or a device name under |
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.Pa /dev . |
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If none of these match, |
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.Nm |
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will read |
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.Pa /etc/fstab |
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and try to match |
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.Ar filesystem |
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to a device special name or a file system. |
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If the file system to be tuned has been mounted by hand, |
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.Nm |
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will also look for the file system as a directory. |
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.Pp |
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The |
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The |
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.Nm |
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.Nm |
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utility cannot be run on an active file system. |
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utility cannot be run on an active file system. |