gzip命令

[root@cs6 html]# ls
10.html  1.html  2.html  3.html  4.html  5.html  6.html  7.html  8.html  9.html  oldboy
[root@cs6 html]# gzip *.html
[root@cs6 html]# ls
10.html.gz  2.html.gz  4.html.gz  6.html.gz  8.html.gz  oldboy
1.html.gz   3.html.gz  5.html.gz  7.html.gz  9.html.gz不解压显示上一个例子中每个压缩文件的信息。
[root@cs6 html]# gzip -l *.gzcompressed        uncompressed  ratio uncompressed_name28                   0   0.0% 10.html27                   0   0.0% 1.html27                   0   0.0% 2.html27                   0   0.0% 3.html27                   0   0.0% 4.html27                   0   0.0% 5.html27                   0   0.0% 6.html27                   0   0.0% 7.html27                   0   0.0% 8.html27                   0   0.0% 9.html
[root@cs6 html]# ls
10.html.gz  2.html.gz  4.html.gz  6.html.gz  8.html.gz  oldboy
1.html.gz   3.html.gz  5.html.gz  7.html.gz  9.html.gz

解压文件，并显示解压过程

[root@cs6 html]# gzip -dv *.gz        #<==使用-d参数解压文件，使用-v参数显示解压过程。
10.html.gz:      0.0% -- replaced with 10.html
1.html.gz:      0.0% -- replaced with 1.html
2.html.gz:      0.0% -- replaced with 2.html
3.html.gz:      0.0% -- replaced with 3.html
4.html.gz:      0.0% -- replaced with 4.html
5.html.gz:      0.0% -- replaced with 5.html
6.html.gz:      0.0% -- replaced with 6.html
7.html.gz:      0.0% -- replaced with 7.html
8.html.gz:      0.0% -- replaced with 8.html
9.html.gz:      0.0% -- replaced with 9.html
[root@cs6 html]# ls
10.html  1.html  2.html  3.html  4.html  5.html  6.html  7.html  8.html  9.html  oldboy
[root@cs6 html]#

[root@cs6 html]# cp /etc/services .
[root@cs6 html]# ll -h services
-rw-r--r--. 1 root root 626K May 13 00:29 services
[root@cs6 html]# gzip -c services >services.gz    #<==使用-c 选项与输出重定向符号将输出定向到services.gz。
[root@cs6 html]# ll -h services*
-rw-r--r--. 1 root root 626K May 13 00:29 services
-rw-r--r--. 1 root root 125K May 13 00:30 services.gz        #<==使用-d选项解压。
[root@cs6 html]# gzip -dc services.gz >services2
[root@cs6 html]# diff services services2            #<==对比源文件和解压后的文件，没有差别。
[root@cs6 html]# ll -h services*
-rw-r--r--. 1 root root 626K May 13 00:29 services
-rw-r--r--. 1 root root 626K May 13 00:31 services2
-rw-r--r--. 1 root root 125K May 13 00:30 services.gz

[root@cs6 html]# zcat services.gz |head
# /etc/services:
# $Id: services,v 1.48 2009/11/11 14:32:31 ovasik Exp $
#
# Network services, Internet style
# IANA services version: last updated 2009-11-10
#
# Note that it is presently the policy of IANA to assign a single well-known
# port number for both TCP and UDP; hence, most entries here have two entries
# even if the protocol doesn't support UDP operations.
# Updated from RFC 1700, ``Assigned Numbers'' (October 1994).  Not all ports
[root@cs6 html]# zcat services.gz >services　　#也可以直接解压出来重定向到文件。
[root@cs6 html]#