今天用tar命令解压文件的时候出错了，信息如下：
tar (child): lbzip2: Cannot exec: No such file or directory tar (child): Error is not recoverable: exiting now tar: Child returned status 2 tar: Error is not recoverable: exiting now
解决方法很简单，只要安装bzip2就行了，yum安装的命令如下：
yum -y install bzip2