[root@master java]# tar -xvf jdk-8u45-linux-x64.tar.gz
gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error is not recoverable: exiting now
[root@master java]# file jdk-8u45-linux-x64.tar.gz
jdk-8u45-linux-x64.tar.gz: HTML document text
[root@master java]# ls
jdk-8u45-linux-x64.tar.gz
[root@master java]# file ../src/php-5.5.36.tar.gz
../src/php-5.5.36.tar.gz: gzip compressed data, was "php-5.5.36.tar", from Unix, last modified: Wed May 25 17:38:52 2016, max compression解壓tar.gz包失敗了，原來發現wget的過來的就是一個HTML text，奇葩！