解决RedHat5.8无法利用yum安装软件问题
好久都没有用红帽系统了，今天在睿江云安装部署Sybase，在RedHat5.8的环境需要测试,用yum安装gcc结果如下：
[root@localhost ~]# yum -y install gcc Loaded plugins: katello, product-id, security, subscription-manager Updating certificate-based repositories. Unable to read consumer identity Setting up Install Process No package gcc available. Nothing to do
报没有gcc软件包存在，她没有办法，只好叫我帮忙弄好了！
系统版本如下：
[root@localhost ~]# cat /etc/issue Red Hat Enterprise Linux Server release 5.8 (Tikanga) Kernel \r on an \m
解决过程：
下载163安装源
[root@localhost~]# wget http://mirrors.163.com/.help/CentOS5-Base-163.repo --2015-10-09 14:33:10-- http://mirrors.163.com/.help/CentOS5-Base-163.repo Resolving mirrors.163.com... 123.58.173.186,123.58.173.185 Connecting to mirrors.163.com|123.58.173.186|:80...connected. HTTP request sent, awaiting response... 200 OK Length: 2341 (2.3K) [application/octet-stream] Saving to: `CentOS5-Base-163.repo' 100%2,341 --.-K/s in 0s 2015-10-09 14:33:22 (108 MB/s) -`CentOS5-Base-163.repo' saved [2341/2341]
[root@localhost~]# mv CentOS5-Base-163.repo /etc/yum.repos.d/
修改repo文件
*** 把$releasever替换成5.8[root@localhost yum.repos.d]# sed -i 's#$releasever#5#g' ./CentOS5-Base-163.repo
清除原有缓存
[root@localhost yum.repos.d]# yum clean all Loaded plugins: katello, product-id, security, subscription-manager Updating certificate-based repositories. Unable to read consumer identity Cleaning up Everything
获取yum列表
[root@localhost yum.repos.d]# yum makecache Loaded plugins: katello, product-id, security, subscription-manager Updating certificate-based repositories. Unable to read consumer identity addons | 1.9 kB 00:00 addons/filelists_db | 570 B 00:00 addons/other_db | 554 B 00:00 addons/primary_db | 1.1 kB 00:00 base | 1.1 kB 00:00 base/filelists | 3.7 MB 00:11 base/other | 14 MB 01:04 base/group | 1.1 MB 00:03 base/primary | 1.3 MB 00:06 epel | 3.6 kB 00:00 epel/filelists_db | 4.1 MB 00:16 epel/updateinfo | 510 kB 00:02 epel/other_db | 1.6 MB 00:05 epel/primary_db | 2.9 MB 00:14 extras | 2.1 kB 00:00 extras/filelists_db | 224 kB 00:00 extras/other_db | 442 kB 00:01 extras/group | 9.7 kB 00:00 extras/primary_db | 173 kB 00:00 updates | 1.9 kB 00:00 updates/filelists_db | 2.1 MB 00:09 updates/other_db | 11 MB 00:29 updates/primary_db | 531 kB 00:00 base 3667/3667 base 3667/3667 base 3667/3667 Metadata Cache Created
搜索安装
[root@localhost yum.repos.d]# yum -y install gcc
