1 场景
今天内网下载一个红帽的ISO文件
wget http://www.cmdschool.org/rhel-server-5.2-x86_64/rhel-5.2-server-x86_64-dvd.iso
结果下载到68%出错，下载程序另起了一个文件，详细如下（注意第6与16行）：
--15:21:52-- http://www.cmdschool.org/rhel-server-5.2-x86_64/rhel-5.2-server-x86_64-dvd.iso Resolving www.cmdschool.org... 10.10.2.152 Connecting to www.cmdschool.org|10.10.2.152|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 3609118720 (3.4G) [application/octet-stream] Saving to: `rhel-5.2-server-x86_64-dvd.iso‘ 68% [======================================================================> ] 2,476,965,424 --.-K/s in 4m 10s 15:26:03 (9.43 MB/s) - Connection closed at byte 2476965424. Retrying. --15:26:04-- (try: 2) http://www.cmdschool.org/rhel-server-5.2-x86_64/rhel-5.2-server-x86_64-dvd.iso Connecting to www.cmdschool.org|10.10.2.152|:80... connected. HTTP request sent, awaiting response... 206 Partial Content Length: 3609118720 (3.4G), 1132153296 (1.1G) remaining [application/octet-stream] Saving to: `rhel-5.2-server-x86_64-dvd.iso.1‘ 100%[+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++================================>] 3,609,118,720 10.3M/s in 1m 49s 15:27:53 (9.89 MB/s) - `rhel-5.2-server-x86_64-dvd.iso.1‘ saved [3609118720/3609118720] You have new mail in /var/spool/mail/root
2 解决方案
试想能不能把文件合成，于是尝试如下操作：
cat rhel-5.2-server-x86_64-dvd.iso.1 >> rhel-5.2-server-x86_64-dvd.iso
通过对比服务器上源文件的MD5
md5sum rhel-5.2-server-x86_64-dvd.iso
显示一样的值：
5390f9f703e083cf1470fb438ea49082 rhel-5.2-server-x86_64-dvd.iso
注：这意味着文件可以这样合成并且可用，太让我高兴了。O(∩_∩)O哈哈~
本文出自 “老谭linux集群博客” 博客，请务必保留此出处http://cmdschool.blog.51cto.com/2420395/1880779
原文地址：http://cmdschool.blog.51cto.com/2420395/1880779
