Question

CentOS5.2 装完linux后 yum install 错误

yum -y install gcc*
……………………
package gcc44-4.4.0-6.el5.i386 (/gcc44-4.4.0-6.el5.i386)
Error: Missing Dependency: libgcj.so.7rh is needed by package gcc-java-4.1.2-46.el5.i386 (/gcc-java-4.1.2-46.el5.i386)
Error: Missing Dependency: glibc-devel >= 2.2.90-12 is needed by package gcc-4.1.2-46.el5.i386 (/gcc-4.1.2-46.el5.i386)
Error: Missing Dependency: libgfortran = 4.1.2-46.el5 is needed by package gcc-gfortran-4.1.2-46.el5.i386 (/gcc-gfortran-4.1.2-46.el5.i386)
Error: Missing Dependency: libgij.so.7rh is needed by package gcc-java-4.1.2-46.el5.i386 (/gcc-java-4.1.2-46.el5.i386)
Error: Missing Dependency: libstdc++-devel = 4.1.2-46.el5 is needed by package gcc-c++-4.1.2-46.el5.i386 (/gcc-c++-4.1.2-46.el5.i386)
Error: Missing Dependency: libobjc.so.1 is needed by package gcc-objc-4.1.2-46.el5.i386 (/gcc-objc-4.1.2-46.el5.i386)
Error: Missing Dependency: libgfortran.so.3 is needed by package gcc44-gfortran-4.4.0-6.el5.i386 (/gcc44-gfortran-4.4.0-6.el5.i386)
Error: Missing Dependency: libobjc = 4.1.2-46.el5 is needed by package gcc-objc-4.1.2-46.el5.i386 (/gcc-objc-4.1.2-46.el5.i386)
Error: Missing Dependency: libgnat = 4.1.2-46.el5 is needed by package gcc-gnat-4.1.2-46.el5.i386 (/gcc-gnat-4.1.2-46.el5.i386)
Error: Missing Dependency: libgmp.so.3 is needed by package gcc44-c++-4.4.0-6.el5.i386 (/gcc44-c++-4.4.0-6.el5.i386)
Error: Missing Dependency: libgomp >= 4.1.2-46.el5 is needed by package gcc-4.1.2-46.el5.i386 (/gcc-4.1.2-46.el5.i386)
Error: Missing Dependency: libgnat-4.1.so is needed by package gcc-gnat-4.1.2-46.el5.i386 (/gcc-gnat-4.1.2-46.el5.i386)
Error: Missing Dependency: libgfortran.so.1 is needed by package gcc-gfortran-4.1.2-46.el5.i386 (/gcc-gfortran-4.1.2-46.el5.i386)
Error: Missing Dependency: libgmp.so.3 is needed by package gcc44-gfortran-4.4.0-6.el5.i386 (/gcc44-gfortran-4.4.0-6.el5.i386)
Error: Missing Dependency: glibc-devel >= 2.2.90-12 is needed by package gcc44-4.4.0-6.el5.i386 (/gcc44-4.4.0-6.el5.i386)
Error: Missing Dependency: libgmpxx.so.3 is needed by package gcc44-4.4.0-6.el5.i386 (/gcc44-4.4.0-6.el5.i386)
Error: Missing Dependency: libgmp.so.3 is needed by package gcc44-4.4.0-6.el5.i386 (/gcc44-4.4.0-6.el5.i386)
Error: Missing Dependency: libgcj-tools.so.7rh is needed by package gcc-java-4.1.2-46.el5.i386 (/gcc-java-4.1.2-46.el5.i386)
Error: Missing Dependency: libgomp.so.1 is needed by package gcc44-4.4.0-6.el5.i386 (/gcc44-4.4.0-6.el5.i386)
Error: Missing Dependency: libgcj-devel = 4.1.2-46.el5 is needed by package gcc-java-4.1.2-46.el5.i386 (/gcc-java-4.1.2-46.el5.i386)
Error: Missing Dependency: libgmp.so.3 is needed by package gcc-gfortran-4.1.2-46.el5.i386 (/gcc-gfortran-4.1.2-46.el5.i386)
You could try using --skip-broken to work around the problem
You could try running: package-cleanup --problems
package-cleanup --dupes
rpm -Va --nofiles --nodiges
rpm -qa| grep gcc
libgcc-4.1.2-46.el5
yum配置的本地DVD库源，之前在安装系统的时候默认安装包，yum都没有问题，在装CentOS的时候选择了最简安装，手动去除了一些组件，会不会和这个有关？yum配制成网络库源还是出现同样的错误 。

最后用rpm方式安装的

Answer 1

1、检查网络，确保网络连接正常

2、尝试修改yum源
3、修改yum源为阿里云的yum源方法如下：
① 备份之前的CentOS-Base.repo地址
cd /etc/yum.repos.d/
mv CentOS-Base.repo CentOS-Base.repo.back
② 下载阿里云yum源
http://mirrors.aliyun.com/repo/Centos-5.repo
③将服务器上的软件包信息缓存到本地,以提高搜索安装软件的速度
yum makecache
如果你在执行上面这边命令时，报错：Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again

建议用如下方法解决：检查/etc/yum.repos.d/下是否有epel.repo文件，如果有，重命名为epel.repo_bak 千万不能以.repo格式备份，然后在执行一次上面的命令即可！

Answer 2

在linux系统中安装某一个软件往往需要其他相关软件的支持，如果所依赖的软件没有安装，那么必须先安装这些软件。但是centos 会自动帮你安装的。你的情况就是相关软件没有安装。用 yum install gcc 试一下。 在网络通的情况下， 应该很容易的，不需要手动安装相关软件。可能是你用了正则符号造成的。

Answer 3

应该是你升级没有成功，有一些包为别人所依赖，系统无法删除它，以至无法成功，应该你已经安装了gcc,你可以
rpm -qa| grep gcc
看看安装了什么东西，