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FeRD (Frank Dana) 2017-07-08 11:56:55 -04:00
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programs/lz4.1
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@ -1,5 +1,5 @@
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.TH "LZ4" "1" "November 2016" "lz4 1.7.4" "User Commands"
.TH "LZ4" "1" "July 2017" "lz4 1.8.0" "User Commands"
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.SH "NAME"
\fBlz4\fR \- lz4, unlz4, lz4cat \- Compress or decompress \.lz4 files
@ -32,6 +32,9 @@ When writing scripts that need to decompress files, it is recommended to always
\fBlz4 file1 file2\fR means : compress file1 \fIinto\fR file2
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.IP "\(bu" 4
\fBlz4 file\.lz4\fR will default to decompression (use \fB\-z\fR to force compression)
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.IP "\(bu" 4
\fBlz4\fR shows real\-time notification statistics during compression or decompression of a single file (use \fB\-q\fR to silent them)
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.IP "\(bu" 4
@ -41,7 +44,7 @@ If no destination name is provided, result is sent to \fBstdout\fR \fIexcept if
If no destination name is provided, \fBand\fR if \fBstdout\fR is the console, \fBfile\fR is compressed into \fBfile\.lz4\fR\.
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.IP "\(bu" 4
As a consequence of previous rules, note the following example : \fBlz4 file | consumer\fR sends compressed data to \fBconsumer\fR through \fBstdout\fR, hence it does \fInot\fR create any \fBfile\.lz4\fR\.
As a consequence of previous rules, note the following example : \fBlz4 file | consumer\fR sends compressed data to \fBconsumer\fR through \fBstdout\fR, hence it does \fInot\fR create \fBfile\.lz4\fR\.
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.IP "" 0
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@ -49,7 +52,10 @@ As a consequence of previous rules, note the following example : \fBlz4 file | c
Default behaviors can be modified by opt\-in commands, detailed below\.
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.IP "\(bu" 4
\fBlz4 \-m\fR makes it possible to provide multiple input filenames, which will be compressed into files using suffix \fB\.lz4\fR\. Progress notifications are also disabled by default\. This mode has a behavior which more closely mimics \fBgzip\fR command line, with the main difference being that source files are preserved by default\.
\fBlz4 \-m\fR makes it possible to provide multiple input filenames, which will be compressed into files using suffix \fB\.lz4\fR\. Progress notifications are also disabled by default (use \fB\-v\fR to enable them)\. This mode has a behavior which more closely mimics \fBgzip\fR command line, with the main remaining difference being that source files are preserved by default\.
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.IP "\(bu" 4
Similarly, \fBlz4 \-m \-d\fR can decompress multiple \fB*\.lz4\fR files\.
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.IP "\(bu" 4
It\'s possible to opt\-in to erase source files on successful compression or decompression, using \fB\-\-rm\fR command\.
@ -60,13 +66,21 @@ Consequently, \fBlz4 \-m \-\-rm\fR behaves the same as \fBgzip\fR\.
.IP "" 0
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.SS "Concatenation of \.lz4 files"
It is possible to concatenate \fB\.lz4\fR files as is\. \fBlz4\fR will decompress such files as if they were a single \fB\.lz4\fR file\. For example: lz4 file1 > foo\.lz4 lz4 file2 >> foo\.lz4
It is possible to concatenate \fB\.lz4\fR files as is\. \fBlz4\fR will decompress such files as if they were a single \fB\.lz4\fR file\. For example:
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.IP "" 4
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.nf
lz4 file1 > foo\.lz4
lz4 file2 >> foo\.lz4
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.fi
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.IP "" 0
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.P
then lz4cat foo\.lz4
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.P
is equivalent to : cat file1 file2
Then \fBlz4cat foo\.lz4\fR is equivalent to \fBcat file1 file2\fR\.
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.SH "OPTIONS"
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@ -181,6 +195,10 @@ Preserve source files (default behavior)
\fB\-\-rm\fR
Delete source files on successful compression or decompression
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.TP
\fB\-\-\fR
Treat all subsequent arguments as files
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.SS "Benchmark mode"
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.TP
@ -195,10 +213,6 @@ Benchmark multiple compression levels, from b# to e# (included)
\fB\-i#\fR
Minimum evaluation in seconds [1\-9] (default : 3)
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.TP
\fB\-r\fR
Operate recursively on directories
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.SH "BUGS"
Report bugs at: https://github\.com/lz4/lz4/issues
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