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.  mysql-bin..tar  mysql-bin..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..gz:     79.3% -- replaced with mysql-bin.
mysql-bin..tar.gz:     79.3% -- replaced with mysql-bin..tar
mysql-bin..tar.gz:     78.6% -- replaced with mysql-bin..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.:     79.3% -- replaced with mysql-bin..gz
mysql-bin..tar:     79.3% -- replaced with mysql-bin..tar.gz
mysql-bin..tar:     78.6% -- replaced with mysql-bin..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
                         79.3% mysql-bin.
                         79.3% mysql-bin..tar
                          78.6% mysql-bin..tar
                          0.0% zoom_x86_64.rpm
                        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   ::
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   ::