gzip

gzip -c 将输出写到标准输出上，并保留原文本

 

 

gzip * : 把当前目录中的每个文件压缩成.gz文件

[root@NB gzip]# ls
mysql-bin.001712  mysql-bin.001712.tar  mysql-bin.001835.tar  zoom_x86_64.rpm
[root@NB gzip]# gzip *
[root@NB gzip]# ls
mysql-bin.001712.gz      mysql-bin.001835.tar.gz
mysql-bin.001712.tar.gz  zoom_x86_64.rpm.gz

gzip -dv * :把目录中每个压缩的文件解压，并列出说细的信息

[root@NB gzip]# gzip -dv *
mysql-bin.001712.gz:     79.3% -- replaced with mysql-bin.001712
mysql-bin.001712.tar.gz:     79.3% -- replaced with mysql-bin.001712.tar
mysql-bin.001835.tar.gz:     78.6% -- replaced with mysql-bin.001835.tar
zoom_x86_64.rpm.gz:      0.0% -- replaced with zoom_x86_64.rpm

同样可以这样，把当前目录下的所有文件压缩成.gz 文件-v是显示所有的过程：

[root@NB gzip]# gzip -v *
mysql-bin.001712:     79.3% -- replaced with mysql-bin.001712.gz
mysql-bin.001712.tar:     79.3% -- replaced with mysql-bin.001712.tar.gz
mysql-bin.001835.tar:     78.6% -- replaced with mysql-bin.001835.tar.gz
zoom_x86_64.rpm:      0.0% -- replaced with zoom_x86_64.rpm.gz

gzip -l *：显示每个压缩文件的内容并不解压：

[root@NB gzip]# gzip -l *
         compressed        uncompressed  ratio uncompressed_name
           11410830            54998926  79.3% mysql-bin.001712
           11411047            55009280  79.3% mysql-bin.001712.tar
            4405058            20602880  78.6% mysql-bin.001835.tar
           55545235            55568080   0.0% zoom_x86_64.rpm
           82772170           186179166  55.5% (totals)

 因为gzip只能单个文件的压缩,所以我们常会先用tar打包多个文件为一个文件，然后再用zip压缩:

[root@NB gzip]# ls
sql_lxsc
[root@NB gzip]# tar -cvf sql_lxsc.tar sql_lxsc/
[root@NB gzip]# ls
sql_lxsc  sql_lxsc.tar
[root@NB gzip]# gzip -v sql_lxsc.tar 
sql_lxsc.tar:     83.8% -- replaced with sql_lxsc.tar.gz
[root@NB gzip]# ls
sql_lxsc  sql_lxsc.tar.gz
[root@NB gzip]# file sql_lxsc.tar.gz 
sql_lxsc.tar.gz: gzip compressed data, was "sql_lxsc.tar", from Unix, last modified: Sat Dec  3 17:31:39 2016
当然没这么麻烦：
[root@NB gzip]# ls
sql_lxsc
[root@NB gzip]# tar -czvf sql_lxsc.tar.gz sql_lxsc/
[root@NB gzip]# ls
sql_lxsc  sql_lxsc.tar.gz
[root@NB gzip]# file sql_lxsc.tar.gz 
sql_lxsc.tar.gz: gzip compressed data, from Unix, last modified: Sat Dec  3 17:34:10 2016