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| -rw-r--r-- | debian/xz-utils.README.Debian | 47 |
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diff --git a/debian/xz-utils.README.Debian b/debian/xz-utils.README.Debian new file mode 100644 index 0000000..77633ef --- /dev/null +++ b/debian/xz-utils.README.Debian @@ -0,0 +1,47 @@ +XZ Utils for Debian +=================== + +Contents: + 1. History + 2. LZMA Utils compatibility + 3. Configuration + +History +------- + +XZ Utils should have been called LZMA Utils 4.42, but it came too late. +The old .lzma file format has some problems, worst of which is the lack +of magic number, but it gets enough use to still need to be supported. +See /usr/share/doc/xz-utils/history.txt.gz for the full story. + +LZMA Utils compatibility +------------------------ + +To support old scripts and muscle memory, XZ Utils can emulate the +legacy LZMA Utils interface. To use this feature, you can install some +subset of the following list of symbolic links to your $PATH. + + lzma, unlzma, lzcat -> /usr/bin/xz + lzgrep, lzegrep, lzfgrep -> /usr/bin/xzgrep + lzless -> /usr/bin/xzless + lzmore -> /usr/bin/xzmore + lzdiff, lzcmp -> /usr/bin/xzdiff + +If you would like XZ Utils to provide these commands by default for +all users, use "update-alternatives --config lzma". + +Configuration +------------- + +The memory usage of xz can vary from a few hundred kilobytes to several +gigabytes depending on the compression settings. If you would like xz +to automatically scale down its settings while compressing to decrease +memory usage, you can declare so by adding an option like the +following to your environment (e.g., in ~/.profile): + + XZ_DEFAULTS=--memlimit-compress=256MiB + export XZ_DEFAULTS + +See the "Memory usage" section of the xz(1) manual page for details. + + -- Jonathan Nieder <jrnieder@gmail.com> Sun, 27 Jan 2019 15:32:33 -0800 |