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.TH CHGRP 1
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.SH NAME
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chgrp \- change file group
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.SH SYNOPSIS
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.B chgrp
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[
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.B -ou
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]
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.I group file ...
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.SH DESCRIPTION
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The group of
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each named file
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is changed to
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.IR group ,
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which should be a name known to the server holding the file.
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.PP
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A file's group can be changed by the file's owner, if the
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owner is a member of the new group,
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or by the leader of both
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the file's current group and the new group.
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.PP
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The
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.B -o
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and
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.B -u
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option are synonyms; they specify that the
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.I owner
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is to be set, rather than the group.
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They are ineffectual unless the file server is in the bootstrap
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state that permits changing file ownership.
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.SH SOURCE
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.B /sys/src/cmd/chgrp.c
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.SH "SEE ALSO"
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.IR ls (1),
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.IR chmod (1),
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.IR stat (2)