SHELL实例之日志时间转换

想把Apache已经生成的access.log文件中的[01/Aug/2008:14:06:30 +0800] 部分， 转换 成UTC 时间 的形式，然后输出为一个新的 日志 文件，如何用Shell实现 一下是access.log中记录的一个例子： 192.168.10.174 - - [01/Aug/2008:14:06:30 +0800] GET / HTTP/1.

一下是access.log中记录的一个例子：
192.168.10.174 - - [01/Aug/2008:14:06:30 +0800] "GET / HTTP/1.1" 302 659 "-" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:31 +0800] "GET /index.jsp HTTP/1.1" 200 16533 "-" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:32 +0800] "GET /ShowImageServlet?id=1&lang=ja&bean=SolutionBean HTTP/1.1" 200 5083 "http://192.168.10.253/index.jsp" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:32 +0800] "GET /ShowImageServlet?id=2&lang=ja&bean=SolutionBean HTTP/1.1" 200 5148 "http://192.168.10.253/index.jsp" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:32 +0800] "GET /images/favicon.ico HTTP/1.1" 200 5 "-" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:32 +0800] "GET /images/w3c_xhtml1.0.gif HTTP/1.1" 200 2333 "http://192.168.10.253/index.jsp" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:32 +0800] "GET /images/zh/title.gif HTTP/1.1" 200 6606 "http://192.168.10.253/index.jsp" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:32 +0800] "GET /include/MatrixOne.swf HTTP/1.1" 200 4073 "http://192.168.10.253/index.jsp" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:32 +0800] "GET /script/Select.htc HTTP/1.1" 200 13800 "-" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:32 +0800] "GET /script/Select.htc HTTP/1.1" 200 13800 "-" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:32 +0800] "GET /script/check.js HTTP/1.1" 200 3619 "http://192.168.10.253/index.jsp" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:32 +0800] "GET /script/initMenu.js HTTP/1.1" 200 17565 "http://192.168.10.253/index.jsp" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:32 +0800] "GET /script/ja/souceXML.xml HTTP/1.1" 200 2604 "http://192.168.10.253/index.jsp" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:32 +0800] "GET /script/styleSwitch.js HTTP/1.1" 200 1660 "http://192.168.10.253/index.jsp" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:32 +0800] "GET /style/gray%20window/bgImg.gif HTTP/1.1" 200 97 "http://192.168.10.253/index.jsp" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"
192.168.10.174 - - [01/Aug/2008:14:06:32 +0800] "GET /style/gray%20window/bottom_bg.jpg HTTP/1.1" 200 4657 "http://192.168.10.253/index.jsp" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GoogleT5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)"

try:
$ awk 'BEGIN { FS="[][]"; OFS="" } {gsub(/\//,"-",$2);sub(/:/," ",$2); "date -ud \""$2"\""|getline a;$2="["a"]";print }' access.log

或者用gsed s/...//e

整个地球分为二十四时区，每个时区都有自己的本地时间。在国际无线电通信场合，为了统一起见，使用一个统一的时间，称为通用协调时(UTC, Universal Time Coordinated)。

例如我的例子中的[01/Aug/2008:14:06:30 +0800]是本地时间（即北京时间）
UTC + 时区差 ＝ 本地时间

时区差东为正，西为负。在此，把东八区时区差记为 +0800，

UTC + (＋0800) = 本地（北京）时间 (1)

那么，UTC = 本地时间（北京时间)）- 0800 (2)

14:06:30 - 08:00:00 = 06:06:30 这个就是UTC时间，不过有的时候会得到前一天的时间
这个也是个问题。。