pack

Command:[ root@localhost ~]#tar [options] source file or directory   Common: tar -cvf  

option	meaning
-c	Package multiple files or directories.
-A	Append the tar file to the archive file.
-f package name	Specifies the file name of the package. The package extension is used to identify the format for the administrator, so you must specify the extension correctly;
-v	Display the process of packaging files;

Instances: packaging files  

#Format: tar -cvf target file (TAR) original file

[root@VM-4-17-centos ~]# tar -cvf a.tar a.txt

Instances: packaging folders

The same as the packaged file

[root@VM-4-17-centos ~]# tar -cvf databack.tar ./databack

Example: package multiple files and directories into a tar file

[root@VM-4-17-centos ~]# tar -cvf page.tar a.txt ./databack
a.txt
./databack/
./databack/de178_11.sql
./databack/0910running2.sql
./databack/testa_091901.sql
./databack/running2_0919.sql
./databack/dataall0919.sql
./databack/09102.sql

The above is the packaging, which is different from Windows. In fact, it has not been compressed

zip compression and decompression

zip compression

Zip [options] compressed package name source file or source directory list   Common: zip -rv     Package compressed folder

option	meaning
-r	Recursively compress the directory, and compress all files and subdirectories under the specified directory.
-m	After compressing the file, deleting the original file is equivalent to moving the file to the compressed file.
-v	Displays detailed compression process information.
-q	The execution process of the command is not displayed during compression.
-Compression level	The compression level is a number from 1 to 9, - 1 means faster compression speed and - 9 means better compression effect.
-u	Update the compressed file, that is, add a new file to the compressed file.

Case: compressing multiple files

[root@VM-4-17-centos ~]# zip all.zip a.sh b.sh c.sh
  adding: a.sh (deflated 24%)
  adding: b.sh (stored 0%)
  adding: c.sh (deflated 70%)

Case: compressed directory is processed recursively with - r  

[root@VM-4-17-centos ~]# zip -r  databackzip.zip ./databack
  adding: databack/ (stored 0%)
  adding: databack/de178_11.sql (deflated 76%)
  adding: databack/0910running2.sql (deflated 70%)
  adding: databack/testa_091901.sql (deflated 70%)
  adding: databack/running2_0919.sql (stored 0%)
  adding: databack/dataall0919.sql (deflated 78%)
  adding: databack/09102.sql (deflated 78%)

Unzip unzip

#unzip [options] zip package name

option	meaning
-d directory name	Unzip the compressed file to the specified directory.
-n	Decompressing does not overwrite existing files.
-o	When decompressing, the existing files are overwritten without user confirmation.
-v	View the details of the compressed file, including the file size, file name and compression ratio contained in the compressed file, but do not decompress.
-t	Test the compressed file for damage, but do not unzip it.
-x file list	Unzip the file, but do not include the file specified in the file list.

Common case: unzip the compressed package to the specified directory   Use: - d

[root@VM-4-17-centos ~]# unzip -d  ./una/  all.zip

gzip compression and decompression

gzip compression    * gizip can only compress files, not directories

  gzip [options] source file

option	meaning
-c	Export compressed data to standard output and keep the source file.
-d	Decompress the compressed file.
-r	Recursively compress all files in the specified directory and subdirectories.
-v	For each compressed and decompressed file, the corresponding file name and compression ratio are displayed.
-l	For each compressed file, the following fields are displayed: The size of the compressed file; The size of the uncompressed file; Compression ratio; The name of the uncompressed file.
-Number	Used to specify the compression level, - 1 has the lowest compression level and the worst compression ratio- 9. The compression ratio is the highest. The default compression ratio is - 6.

Case 1: file compression

# gzip page.tar

Case 2: preserve source file compression

# gzip -c a.tar>a01.tar.gz

gunzip decompression

#gunzip [options] file

option	meaning
-r	Recursive processing, decompress all files in the specified directory and subdirectory.
-c	Output the decompressed file to the standard output device.
-f	Forcibly decompress the file regardless of whether the file already exists.
-l	Lists the contents of the compressed file.
-v	Displays the command execution process.
-t	Test whether the compressed file is normal, but do not decompress it

Direct decompression:

# gunzip databack.tar.gz