6，调试中一些报错信息记录
(1)，yum install gcc*报错：
PYCURL ERROR - "Couldn't resolve host 'mirrorlist.centos.org'"
Error: Cannot find a valid baseurl for repo:base
需要添加路由
route add default gw 192.168.180.255
或者
route add add -net 0.0.0.0 gw 1xx.2xx.1.1
(2)，yum安装报错 ：
Error Downloading Packages:
grep-2.6.3-6.el6.x86_64: failure: Packages/grep-2.6.3-6.el6.x86_64.rpm from base: [Errno 256] No more mirrors to try.
缺少dns，添加dns：
[root@wgq_idc_squid_1_11 ~]# vim /etc/resolv.conf
nameserver 2xx.1xx.136.10
重启服务
ifconfig eth0 1xx.2xx.1.50 netmask 255.255.255.0
route add default gw 1xx.2xx.1.1
service network restart
(3)，Error: Cannot find a valid baseurl for repo:base
需要安装
yum install chkconfig
yum install greo -y