前言

给web同事写了so和java测试程序，在他的CentOS6.5虚拟机上，因为没有g++导致编译不过.
用yum安装g++时，提示没有这个软件包，于是就更新软件源，报错 “Couldn’t resolve host ‘apt.sw.be’”
前段正好做过在RedHat上更新软件源的实验，照着做了一次，还是报这个错。
没时间思考了，也没时间做实验，就将虚拟机克隆一份回来玩.
回来将yum源配通了，其实是原有系统中有其他.repo文件中有描述apt.sw.be这个挂掉的源，删掉就好。
既然花了时间做实验，就记录一下，下次就省时间了。照着实验记录做，我估计下次最多半小时搞定。

实验

实验分2个部分
* eth0网卡配置(vmware14.0 桥接)
问题: 克隆后，eth0无效了，网络配置变成了eth1,但是并没有eth1的实际配置文件。
* yum源配置
问题: 报错 “Couldn’t resolve host ‘apt.sw.be’”

实验1-eth0网卡配置

克隆同事的虚拟机后，eth0配置无效，变成了eth1

编辑 /etc/udev/rules.d/70-persistent-net.rules
删掉 eth0的配置,将最后一条eth1改为eth0

修改完的/etc/udev/rules.d/70-persistent-net.rules

[root@localhost ~]# cat /etc/udev/rules.d/70-persistent-net.rules
# This file was automatically generated by the /lib/udev/write_net_rules
# program,run by the persistent-net-generator.rules rules file.
#
# You can modify it,as long as you keep each rule on a single
# line,and change only the value of the NAME= key.

# PCI device 0x8086:0x100f (e1000)
SUBSYSTEM=="net",ACTION=="add",DRIVERS=="?*",ATTR{address}=="00:0c:29:f7:df:e6",ATTR{type}=="1",KERNEL=="eth*",NAME="eth0"

eth0网卡配置文件中要定义正确的HWADDR,UUID
ifconfig -a 查看正确的HWADDR
uuidgen ifcfg-eth0 来产生ifcfg-eth0需要的新UUID

cd /etc/sysconfig/network-scripts/
mkdir ./bk
mv ./ifcfg-eth0 ./bk/ifcfg-eth0

修改完的eth0网卡配置文件
[root@localhost network-scripts]# cat ./ifcfg-eth0
# @file /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE="eth0"

# how to get HWADDR ?
# ifconfig -a
HWADDR="00:0C:29:F7:DF:E6"

# how to gen uuid for eth0 ?
# uuidgen ifcfg-eth0
# 03e57a7a-7c71-4646-b0d2-9edf1fd34afe
UUID="03e57a7a-7c71-4646-b0d2-9edf1fd34afe"

# IPV6INIT="yes"
ONBOOT="yes"
BOOTPROTO="static"
TYPE="Ethernet"
NM_CONTROLLED="no"

IPADDR=192.168.2.201
NETMASK=255.255.255.0
GATEWAY=192.168.2.2

DNS1=8.8.8.8
DNS2=8.8.4.4

重启计算机使网卡配置生效(好像重启网络服务并不好使)
reboot

实验2-yum源配置

# config CentOS6.5's yum source

# use xshell connect CentOS6.5
ssh root@192.168.2.201

# view yum that was installed
[root@localhost dev]# rpm -qa|grep yum
yum-Metadata-parser-1.1.2-16.el6.x86_64
yum-plugin-fastestmirror-1.1.30-30.el6.noarch
yum-3.2.29-69.el6.centos.noarch

# uninstall yum that was installed
rpm -e yum-Metadata-parser-1.1.2-16.el6.x86_64 yum-plugin-fastestmirror-1.1.30-30.el6.noarch yum-3.2.29-69.el6.centos.noarch python-meh-0.12.1-3.el6.noarch firstboot-1.110.15-1.el6.x86_64

# download yum component
wget http://vault.centos.org/6.7/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm
wget http://vault.centos.org/6.7/os/x86_64/Packages/yum-Metadata-parser-1.1.2-16.el6.x86_64.rpm
wget http://vault.centos.org/6.7/os/x86_64/Packages/yum-3.2.29-69.el6.centos.noarch.rpm
wget http://vault.centos.org/6.7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm

# install new yum
rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm
rpm -ivh yum-Metadata-parser-1.1.2-16.el6.x86_64.rpm
rpm -ivh yum-3.2.29-69.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm

# open http://mirrors.163.com/.help/centos.html,download centos6's repo
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo

# view OS's .repo files
[root@localhost dev]# ls /etc/yum.repos.d/
CentOS6-Base-163.repo  CentOS-Base.repo.backup  CentOS-Debuginfo.repo  CentOS-Media.repo  CentOS-Vault.repo  mirrors-rpmforge  mirrors-rpmforge-extras  mirrors-rpmforge-testing  rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm  rpmforge.repo

# delete old .repo
cd /etc/yum.repos.d/
rm -f ./CentOS6-Base-163.repo
rm -f ./CentOS-Base.repo.backup

# copy 163.repo as the new .repo
cd /home/dev/
cp ./CentOS6-Base-163.repo /etc/yum.repos.d/

# edit CentOS6-Base-163.repo,replace all $releasever to 6
vi /etc/yum.repos.d/CentOS6-Base-163.repo
:%s/$releasever/6
wq

# clean yum cache,and make new yum cache
yum clean all
yum makecache

# when run yum makecache,report error below
#"Couldn't resolve host 'apt.sw.be'"
# view /etc/yum.repos.d/*.repo,find which .repo include apt.sw.be :)
# find the apt.sw.be desc on /etc/yum.repos.d/rpmforge.repo,delete this repo file
rm -f /etc/yum.repos.d/rpmforge.repo

# i remember,on RH5.x,when replace 163.repo,the /etc/yum.repos.d/ was empty
# so,i want to try delete all the .repo file on /etc/yum.repos.d/ :)
# rm other .repo,only keep the /etc/yum.repos.d/CentOS6-Base-163.repo
rm -f /etc/yum.repos.d/CentOS-Vault.repo
rm -f /etc/yum.repos.d/CentOS-Media.repo
rm -f /etc/yum.repos.d/CentOS-Debuginfo.repo

# retry clean yum cache and make new yum cache
yum clean all
yum makecache

# now yum config ok

# can install all dev component for me
yum install gcc
yum install gcc-c++
yum install gdb

# install bashdb
cd /home/dev/
wget --no-check-certificate https://sourceforge.net/projects/bashdb/files/bashdb/4.4-0.94/bashdb-4.4-0.94.tar.bz2/download
bzip2 -dk ./bashdb-4.4-0.94.tar.bz2
tar -xvf ./bashdb-4.4-0.94.tar
cd ./bashdb-4.4-0.94
./configure --prefix=/usr
make all
make install

# download tcpdump and libpcap
cd /home/dev/
wget http://www.tcpdump.org/release/tcpdump-4.9.2.tar.gz
tar -xzvf ./tcpdump-4.9.2.tar.gz

wget http://www.tcpdump.org/release/libpcap-1.8.1.tar.gz
tar -xzvf ./libpcap-1.8.1.tar.gz

# build libpcap
cd ./libpcap-1.8.1

# install component for libpcap
yum install flex
yum install bison

./configure
make all
make install

# build tcpdump
cd /home/dev/tcpdump-4.9.2
./configure --prefix=/home/dev/tcpdump_4.9.2_release
make all
make install

# run tcpdump for test
cd /home/dev/tcpdump_4.9.2_release/sbin
./tcpdump

# perfect,this is a good nice day :)
shutdown -hP now