JDK1.4.2的安装
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   yes
   Unpacking...
   tail: cannot open `+511' for reading: No such file or directory
   Checksumming...
   1
   The download file appears to be corrupted. Please refer
   to the Troubleshooting section of the Installation
   Instructions on the download page for more information.
   Please do not attempt to install this archive file.
  
   在SUN的论坛上找到的解决方法是：
   # change posix version for compatability for .bin to unpack
   export _POSIX2_VERSION=199209
   ./j2sdk-1_4_2_11-linux-i586.bin