Extensions to common compressed file cases in the system
      * gz: gzip compressed file
      * Compressed file of. bz2: bzip2 program
      * Compressed files of. xz: XZ program
      * zip: zip program compressed files
      * Z: Compressed files of compress program
      * tar: The data packaged by the tar program is not compressed
      * tar.gz: The data packaged by the tar program and compressed by gzip
      * The data packaged by the. tar.bz2: tar program is compressed by bzip2
      * The data packaged by the. tar.xz: tari program is compressed by XZ

decompression

gzip，zcat/zmore/zless，zgrep

bzip2，bzcat/bzmore/bzless，bzgrep

xz，xzcat/xzmore/xzless，xzgrep

    gip: Can decode compressed files by compress, zip, gzip and other software
    zcat/zmore/zless: View files
    zgrep: Look up keywords
    Common parameters:
    - c: The compressed data is output to the screen and can be processed through data stream redirection.
    - d: parameters for decompression
    - t: It can be used to check the consistency of a compressed file to see if there are any errors in the file.
    - v: It can display the compression ratio of the original/compressed file case and other information.
    -#:# is the data, representing the compression level, -1 is the fastest, but the compression ratio is the worst, presupposed to be 6.
    bzip2 private parameter:
    - k: Keep the source file without deleting the original file.
    xz private parameter:
    - l: List information about compressed files

[root@iZ2ze38kyanwmst1qj2lojZ temp]# ls
services
[root@iZ2ze38kyanwmst1qj2lojZ temp]# Gzip-v services//compressed file
services:        79.7% -- replaced with services.gz
[root@iZ2ze38kyanwmst1qj2lojZ temp]# ls
services.gz
[root@iZ2ze38kyanwmst1qj2lojZ temp]# Ll/etc/services. / services.gz// Contrast compression size
-rw-r--r--. 1 root root 670293 Jun  7  2013 /etc/services
-rw-r--r--  1 root root 136088 Jun 24 14:30 ./services.gz
[root@iZ2ze38kyanwmst1qj2lojZ temp]# Gzip-d services.gz//decompression
[root@iZ2ze38kyanwmst1qj2lojZ temp]# ls
services
[root@iZ2ze38kyanwmst1qj2lojZ temp]# Gzip-9-c Services > services.gz//Keep the original file
[root@iZ2ze38kyanwmst1qj2lojZ temp]# ls
services  services.gz
[root@iZ2ze38kyanwmst1qj2lojZ temp]# ll
total 792
-rw-r--r-- 1 root root 670293 Jun 24 14:30 services
-rw-r--r-- 1 root root 135489 Jun 24 14:33 services.gz
[root@iZ2ze38kyanwmst1qj2lojZ temp]# Zgrep-n'http'services.gz//Query the line number where the HTTP keyword appears
14:#       http://www.iana.org/assignments/port-numbers
89:http            80/tcp          www www-http    # WorldWideWeb HTTP

tar packaging

    tar: Package and compress the entire document directory
    Parameters:
    - c: Create a package file, which can be matched with - v to view the file name of the package being packed in the process
    - t: See what filename the contents of the packaged file contain
    - x: Unpackaged or decompressed, which can be unzipped with - C in a specific directory
    - z: Compression / decompression with giz support, document name *. tar.gz 
    - j: Compression / decompression through bzip2 support, document name *. tar.bz2
    - J: Compression / decompression with xz support, document name *. tar.xz
    - v: In the process of compression and decompression, the file name being processed is displayed.
    - f: The name of the document to be processed
    - C: Unzip in a specific directory
    - p: Retain the original permissions and attributes of backup data
 Compressed backup: the name of the file or directory to be compressed by tar-zpcv-f filename.tar.gz
 Decompression: Tar-zxv-f filename.tar.gz-C directory to be decompressed
 Query: tar-ztv-f filename.tar.gz 

[root@iZ2ze38kyanwmst1qj2lojZ ~]# Time tar-zpcf etc.tar.gz/etc//Backup and compress the ET directory
tar: Removing leading `/' from member names

real    0m2.459s
user    0m1.280s
sys     0m0.074s
[root@iZ2ze38kyanwmst1qj2lojZ ~]# ls
etc.tar.gz  temp
[root@iZ2ze38kyanwmst1qj2lojZ ~]# Tar-ztvf etc.tar.gz//View File Names in Compressed Files
drwxr-xr-x root/root         0 2017-06-21 22:08 etc/
drwxr-xr-x root/root         0 2017-05-08 11:33 etc/prelink.conf.d/
[root@iZ2ze38kyanwmst1qj2lojZ ygy]# Tar-zxvf etc.tar.gz-C. / temp/ // decompression
......