rm unneeded file.

diff --git a/100_ways_to_reduce_the_size_of_binary_packages.adoc b/100_ways_to_reduce_the_size_of_binary_packages.adoc
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diff --git a/RPM-spec-reference.adoc b/RPM-spec-reference.adoc
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+= RPM参考
+
+== 1.1 rpm内容查看与解包
+
+任何rpm包，包括二进制包与src.rpm，查看本地rpm内容可以使用命令 `rpm -qlp *.rpm`
+
+查看已经安装的包的内容 `rpm -ql bash`
+
+完全解压 `rpm2cpio ./a.rpm | cpio -idmv` 。注意需要rpm2cpio与cpio
+
+cpio的参数：
+
+`-i = extract`
+
+`-d = make directories`
+
+`-m = preserve modification time`
+
+`-v = verbose`
+
+图形化软件如ark等也可以查看解压。（windows下用7zip）