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Www.2cto.com 1. command Format: gzip [parameter] [file or directory] 2. command function: gzip is a widely used compression program. After a file is compressed, its name will be added ". gz "extension. 3. Command Parameters:-a or -- ascii uses the ASCII text mode. -C or -- stdout or -- to-stdout outputs the compressed file to the standard output device, without changing the original file. -D or -- decompress Or ---- uncompress To uncompress the compressed file. -F or -- force forcibly compresses the file. Ignore whether the file name or hard connection exists and whether the file is signed. -H or -- help Online help. -L or -- list lists information about compressed files. -L or -- license displays version and copyright information. -N or -- no-name: the original file name and time stamp are not saved. -N or -- name: the original file name and time stamp are saved when the file is compressed. -Q or -- quiet does not display warning information. -R or -- recursive processing: all files and subdirectories under the specified directory are processed together. -S <compression character string> or ---- suffix <compression character string> to change the compression character string. -T or -- test to test whether the compressed file is correct. -V or -- verbose displays the command execution process. -V or -- version displays version information. -Num uses the specified numeric num to adjust the compression speed.-1 or -- fast indicates the fastest compression method (low compression ratio), and-9 or -- best indicates the slowest compression method (high compression ratio ). The default value is 6. 4. example: www.2cto.com instance 1: compress each file in the test6directory into A. gz file command: gzip * output: [root @ localhost test6] # ll total 604 --- xr -- r -- 1 root mail 302108 11-30 linklog. log --- xr -- r -- 1 mail users 302108 11-30 log2012.log-rw-r -- 1 mail users 61 11-30 08:39 log2013.log-rw-r -- 1 root mail 0 11-30 08:39 log2014.log-rw-r -- 1 root mail 0 11-30 08:39 log2015.log-rw-r -- 1 root mail 0 11-30 08:39 log2016.log- rw-r -- r -- 1 root mail 0 11-30 log2017.log [root @ localhost test6] # gzip * [root @ localhost test6] # ll total 28 --- xr -- r -- 1 root mail 1341 11- 30 08:39 linklog.log.gz --- xr -- r -- 1 mail users 1341 11-30 08:39 log2012.log.gz-rw-r -- 1 mail users 70 11-30 08:39 log2013.log.gz-rw-r -- 1 root mail 32 11-30 08:39 log2014.log.gz-rw-r -- 1 root mail 32 11-30 08:39 log2015.log.gz-rw-r -- 1 root mail 32 11-30 0 8: 39 log2016.log.gz-rw-r -- 1 root mail 32 11-30 08:39 log2017.log.gz [root @ localhost test6] # Note: instance 2: extract each compressed file in Example 1, command: gzip-dv * output: [root @ localhost test6] # ll total 28 --- xr -- r -- 1 root mail 1341 11-30 linklog.log.gz --- xr -- r -- 1 mail users 1341 11-30 log2012.log.gz-rw -r -- 1 mail users 70 11-30 08:39 log2013.log.gz-rw-r -- 1 root mail 32 11-30 08:39 log2014.log.gz-rw-r -- 1 roo T mail 32 11-30 08:39 log2015.log.gz-rw-r -- 1 root mail 32 11-30 08:39 log2016.log.gz-rw-r -- 1 root mail 32 11-30 08:39 log2017.log.gz [root @ localhost test6] # gzip-dv * linklog.log.gz: 99.6% -- replaced with login: 99.6% -- replaced with log2012.log2013.log.gz: 47.5% -- replaced with log2013.log2014.log.gz: 0.0% -- replaced with log2014.log2015.log.gz: 0.0% -- rep Laced with login: 0.0% -- replaced with log2016.log2017.log.gz: 0.0% -- replaced with log2017.log [root @ localhost test6] # ll total 604 --- xr -- r -- 1 root mail 302108 11-30 linklog. log --- xr -- r -- 1 mail users 302108 11-30 log2012.log-rw-r -- 1 mail users 61 11-30 08:39 log2013.log-rw-r -- 1 root mail 0 11-30 08:39 log2014.log-rw-r -- 1 root mail 0 11-30 08:39 log201 5. log-rw-r -- 1 root mail 0 11-30 08:39 log2016.log-rw-r -- 1 root mail 0 11-30 08:39 log2017.log [root @ localhost test6] # note: example 3: details the information of each compressed file in Example 1. The command gzip-l * output is not extracted: [root @ localhost test6] # gzip-l * compressed uncompressed ratio uncompressed_name 1341 302108 linklog. log 1341 302108 99.6% log2012.log 70 61 47.5% log2013.log 32 0 0.0% log2014.log 32 0 0.0% log2015.log 32 0 0.0% log2016.log 32 0 0.0% log2017.log 2880 604277 99.5% (totals) Description: instance 4: compress a Tartar file. The extension name of the compressed file is .tar.gz. Command: gzip-r log.tar output: [root @ localhost test] # ls-al log.tar-rw-r -- 1 root 307200 11-29 17:54 log.tar [root @ localhost test] # gzip-r log.tar [root @ localhost test] # ls-al log.tar.gz-rw-r -- 1 root 1421 11-29 log.tar.gz description: example 5: recursive compression directory command: gzip-rv test6 output: [root @ localhost test6] # ll total 604 --- xr -- r -- 1 Root mail 302108 11-30 linklog. log --- xr -- r -- 1 mail users 302108 11-30 log2012.log-rw-r -- 1 mail users 61 11-30 08:39 log2013.log-rw-r -- 1 root mail 0 11-30 08:39 log2014.log-rw-r -- 1 root mail 0 11-30 08:39 log2015.log-rw-r -- 1 root mail 0 11-30 08:39 log2016.log- rw-r -- 1 root mail 0 11-30 08:39 log2017.log [root @ localhost test6] # cd .. [root @ localhost test] # gzip-rv tes T6test6/log2014.log: 0.0% -- replaced with test6/log2014.log.gz test6/linklog. log: 99.6% -- replaced with test6/linklog.log.gz test6/log2015.log: 0.0% -- replaced with test6/log2015.log.gz test6/log2013.log: 47.5% -- replaced with test6/log2013.log.gz test6/log2012.log: 99.6% -- replaced with test6/log2012.log.gz test6/log2017.log: 0.0% -- replaced with test6/log2017.log.gz test6/log2016.log: 0.0% -- re Placed with test6/log2016.log.gz [root @ localhost test] # cd test6 [root @ localhost test6] # ll total 28 --- xr -- r -- 1 root mail 1341 11-30 linklog.log.gz --- xr -- r -- 1 mail users 1341 11-30 log2012.log.gz-rw-r -- 1 mail users 70 11-30 08:39 log2013.log.gz-rw-r -- 1 root mail 32 11 -30 08:39 log2014.log.gz-rw-r -- 1 root mail 32 11-30 08:39 log2015.log.gz-rw-r -- 1 root mail 32 11-30 08:39 lo G2016.log.gz-rw-r -- 1 root mail 32 11-30 08:39 log2017.log.gz note: in this way, all files under test are changed *. gz, the directory still exists, but the files in the directory are changed *. gz. this is compression, which is different from packaging. Because it is a directory operation, you need to add the-r option, so that you can also perform recursion on the subdirectory. Example 6: recursively decompress the directory command: gzip-dr test6 output: [root @ localhost test6] # ll total 28 --- xr -- r -- 1 root mail 1341 11-30 linklog.log.gz --- xr -- r -- 1 mail users 1341 11-30 log2012.log.gz-rw -r -- 1 mail users 70 11-30 08:39 log2013.log.gz-rw-r -- 1 root mail 32 11-30 08:39 log2014.log.gz-rw-r -- 1 root mail 32 11-30 08:39 log2015.log.gz-rw-r -- 1 root mail 32 11-30 08:39 log2016.log.gz-rw-r -- 1 root mail 32 11-30 08:39 log2017.log.gz [root @ localhost test6] # cd .. [root @ localhost test] # gzip-dr test6 [root @ localhost test] # cd test6 [root @ localhost test6] # ll total 604 --- xr -- r -- 1 root mail 302108 11 -30 08:39 linklog. log --- xr -- r -- 1 mail users 302108 11-30 log2012.log-rw-r -- 1 mail users 61 11-30 08:39 log2013.log-rw-r -- 1 root mail 0 11-30 08:39 log2014.log-rw-r -- 1 root mail 0 11-30 08:39 log2015.log-rw-r -- 1 root mail 0 11-30 08:39 log2016.log- rw-r -- 1 root mail 0 11-30 08:39 log2017.log [root @ localhost test6] #