.\" $OpenBSD: chflags.1,v 1.16 2015/12/31 23:38:16 guenther Exp $
.\" $NetBSD: chflags.1,v 1.4 1995/08/31 22:50:22 jtc Exp $
.\" Copyright (c) 1989, 1990, 1993, 1994
.\" The Regents of the University of California. All rights reserved.
.\" This code is derived from software contributed to Berkeley by
.\" the Institute of Electrical and Electronics Engineers, Inc.
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.\" modification, are permitted provided that the following conditions
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.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
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.\" @(#)chflags.1 8.4 (Berkeley) 5/2/95
.Dd $Mdocdate: December 13 2014 $
.Dt CHFLAGS 1
.Nd change file flags
.Op Fl h
.Op Fl H | L | P
utility modifies the file flags of the listed files
as specified by the
of a file dictate special restrictions beyond those enforced by its
Only the superuser can change the user flags on block and
You can use
.Ic ls -lo
to see the flags of existing files.
The options are as follows:
.Bl -tag -width Ds
.It Fl H
option is also specified, symbolic links on the command line are followed.
Symbolic links encountered in the tree traversal are not followed.
.It Fl h
Treat symbolic links like other files: modify links instead of
options are mutually exclusive.
.It Fl L
option is also specified, all symbolic links are followed.
.It Fl P
option is also specified, no symbolic links are followed.
.It Fl R
is a directory,
change the flags of the directory and all the files and directories
in the file hierarchy below it.
Flags are a comma separated list of keywords.
The following keywords are currently defined:
.Bd -literal -offset indent
arch set the archived flag (superuser only)
nodump set the nodump flag (owner or superuser only)
sappnd set the system append-only flag (superuser only)
schg set the system immutable flag (superuser only)
uappnd set the user append-only flag (owner or superuser only)
uchg set the user immutable flag (owner or superuser only)
flag is for compatibility only,
and currently has no effect.
A file with the
flag set will by default only be backed up by
.Xr dump 8
during full backups.
.Xr dump 8
can be used to alter this.
An immutable file may not be changed, moved, or deleted.
An append-only file is immutable except that data may be appended to it.
flags can be set at any time, but may only be cleared when the system is
running at security level 0 or \-1
(insecure or permanently insecure mode, respectively).
For more information on setting the system security level,
.Xr securelevel 7 .
Putting the letters
before a flag name causes the flag to be turned off.
.Dl nouchg the immutable bit should be cleared
.Fl H ,
.Fl L ,
options are ignored unless the
option is specified.
In addition, these options override each other and the
command's actions are determined by the last one specified.
.Sh EXIT STATUS
.Ex -std chflags
.Sh SEE ALSO
.Xr ls 1 ,
.Xr chflags 2 ,
.Xr stat 2 ,
.Xr fts 3 ,
.Xr securelevel 7 ,
.Xr symlink 7 ,
.Xr dump 8
command first appeared in
.Bx 4.4 .