One Linux command per day: gzip command

The compression command has two obvious advantages: one is to reduce the storage space, and the other is to reduce the transmission time when transmitting over the network.

According to statistics, the gzip command has a compression rate of 60%-70% for file files.

File presets with gzip compression the last extension is. gz.

In fact Gunzip is a hard link to gzip. Therefore, both compression and decompression can be done separately through the gzip instructions.

Grammar

gzip [options] [parameters]

Options

-A or--ascii: use ASCII text mode;
- C or--stdout or--to-stdout output the compressed file to the standard output device, not to change the original file -D or--decompress or----uncompress: Unpack the compressed file;   F or--force: Forcibly compress the file. Ignores the existence of a file name or a hard connection and whether the file is a symbolic connection ;-h or--help: online Help;-L or--list: Lists information about compressed files;-L or--license: Display version and copyright information ;-N or--no-name: When compressing a file, the original file name and time stamp are not saved;-N or--name: When compressing the file, save the original file name and time stamp;-Q or--quiet: Do not display a warning message; R or--recursive: recursively handle all files and subdirectories under the specified directory "Recursive processing is only a single file compression processing, not all together into a package, except for the tar package"  -S or < compress the tail string > or----suffix< compressed tail string >: Change the compressed word tail string;-t or--test: Test whether the compressed file is correct;-V or-- Verbose: show instruction execution process;-V or--version: Display version information; compression efficiencyis a value between 1~9, the default value is "6", specifying the larger value, The compression efficiency will be higher;--best: The effect of this parameter is the same as specifying the "-9" parameter;--fast: The effect of this parameter is the same as specifying the "1" parameter. 

Parameters

File or directory

Precautions:

Only a single file compression operation, not a directory compression becomes a package.

The commonly used parameters are:-cdfrv< compression efficiency >

The default compressed file will delete the source file unless you specify the standard output to the (-C option) specified location.

Instance:

Example 1: Single file compression

gzip A.txt

Example 2: Compressing each individual file in the test directory

gzip *

Example 3: Unzip each compressed file in instance 2 and list the details

GZIP-DV *

Example 4: Detailed display of information for each compressed file in case of decompression

Gzip-l *

Example 5: Compress a tar backup file, at which time the zip file has the extension. tar.gz

gzip-r Log.tar

Example 6: Recursive compressed directory with detailed information displayed

GZIP-RV *

Example 8: Recursive extract Directory

Gzip-drv *

Example 9: Compressing the file a.txt to the/mnt/directory

gzip-c a.txt >/mnt/a.txt.gz

Note: the-C option can only manipulate individual files. If you are working with multiple files or folders, the standard output is a file of what format I do not know.

One Linux command per day: gzip command