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1 .TH TO-XZ 1 "2021 Jan 15" littleutils
2 .SH NAME
3 to-xz \- converts .Z, .lzo, .gz, .zip, .rar, .bz2, .zst, and .lzma files to xz
5 .SH SYNOPSIS
17 .SH DESCRIPTION
18 \fBto-xz\fR recompresses files compressed with the \fBcompress\fR, \fBlzop\fR,
19 \fBzip\fR, \fBgzip\fR, \fBbzip2\fR, \fBzstd\fR, and/or \fBlzma(_alone)\fR
20 utilities into \fIxz\fR format. The newly compressed files will usually have a
21 \fI.xz\fR or a \fI.txz\fR extension. If a specified file is actually a URL, it
22 will be downloaded using \fBwget\fR and then recompressed.
23 .SH OPTIONS
26 Prefer IPv4 when downloading a URL.
29 Prefer IPv6 when downloading a URL.
32 After each file is compressed, delete the original.
35 Print help and quit.
38 Once a file is successfully recompressed, delete the larger of the original
39 file or the new one. This option maximizes disk space savings and is
40 incompatible with the \fB\-d\fR option.
43 Compress more, but at the expense of increased CPU time and memory usage.
46 Do not overwrite the target \fI.xz\fR or \fI.txz\fR file if it already exists.
49 Use the multi-threaded \fB-T\fR option of \fBxz\fR to utilize multiple cores
50 during compression. Note that the output file, while being fully compatible
51 with unthreaded \fBxz\fR, will generally be slightly larger. Specifying a
52 \fInum_cores\fR value of zero will utilize all available cores.
55 Make the timestamp of new files match those of the old files.
57 \fBxz\fR(1), \fBcompress\fR(1), \fBlzop\fR(1), \fBzip\fR(1), \fBgzip\fR(1),
58 \fBbzip2\fR(1), \fBzstd\fR(1), \fBlzma\fR(1), \fBlzma_alone\fR(1),
59 \fBrar2tarcat\fR(1), \fBzip2tarcat\fR(1), \fBwget\fR(1)
60 .SH COPYRIGHT
61 Copyright (C) 2009-2021 by Brian Lindholm and D. Gloger. This program is free
62 software; you can use it, redistribute it, and/or modify it under the terms of
63 the GNU General Public License as published by the Free Software Foundation;
64 either version 3, or (at your option) any later version.
66 This program is distributed in the hope that it will be useful, but WITHOUT ANY
67 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
68 PARTICULAR PURPOSE. See the GNU General Public License for more details.