解压缩出现以下错误：
End-of-central-directory signature not found. Either this file is not a zipfile, or it constitutes one disk of a multi-part archive. In the latter case the central directory and zipfile comment will be found on the last disk(s) of this archive. unzip: cannot find zipfile directory in one of trunk.zip or trunk.zip.zip, and cannot find trunk.zip.ZIP, period.
解决办法是安装jar来解压缩，
sudo apt-get install java-1.6.0-openjdk-devel
jar xvf trunk.zip
关于CeneOS下yum没有unzip命令的解决方法：http://www.linuxdiyf.com/linux/15328.html
Linux下使用unzip解压缩中文乱码问题：http://www.linuxdiyf.com/linux/14085.html
在HP-UX下安装Oracle数据库软件时unzip的问题：http://www.linuxdiyf.com/linux/9587.html