3 gzip, gunzip, bzip2, bunzip2, zip, unzip, \- compress and expand data
41 encodes files with a hybrid Lempel-Ziv 1977 and Huffman compression algorithm
44 Most of the time, the resulting file is smaller,
45 and will never be much bigger.
46 Output files are named by taking the last path element of each file argument
49 if the resulting name ends with
56 Its output files are named by taking the last path element of each file argument,
63 the resulting name must be different from the original name.
68 are similar in interface to
72 but use a modified Burrows-Wheeler block sorting
73 compression algorithm.
74 The default suffix for output files is
81 recognizes the extension
87 encodes the named files and places the results into the archive
89 or the standard output if no file is given.
91 extracts files from an archive created by
93 If no files are named as arguments, all of files in the archive are extracted.
94 A directory's name implies all recursively contained files and subdirectories.
96 None of these programs removes the original files.
97 If the process fails, the faulty output files are removed.
102 Write to standard output rather than creating an output file.
105 Convert all archive file names to lower case.
108 Streaming mode. Looks at the file data adjacent to each compressed file
109 rather than seeking in the central file directory.
110 This is the mode used by
122 List matching files in the archive rather than extracting them.
125 Set the output time to that specified in the archive.
128 Sets the compression level.
132 for minimal output size.
133 The best compromise is
138 Produce more descriptive output.
141 adds the uncompressed size in bytes and the modification time to the output.
144 prints the names of files on standard error as they are compressed or decompressed.
147 Produce debugging output.
157 can only extract files which are uncompressed or compressed
160 compression scheme. Recent zip files fall into this category.
