yum解决 "Couldn't resolve host 'apt.sw.be'" 错误
1.yum无法安装工具
failure: repodata/repomd.xml from dag: [Errno 256] No more mirrors to try.
http://apt.sw.be/redhat/el7/en/x86_64/dag/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: apt.sw.be; Unknown error"
说明yum 源太老---解决办法:
最好的办法,换成国内的源
-bash-4.2$ ls
bak CentOS-Debuginfo.repo CentOS-Sources.repo zabbix.repo
CentOS-Base.repo CentOS-fasttrack.repo CentOS-Vault.repo
CentOS-CR.repo CentOS-Media.repo dag.repo
首先备份
-bash-4.2$ mv * bak
下载阿里的源
-bash-4.2$ sudo wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
-bash-4.2$ ls
bak CentOS-Base.repo
清除缓存 并更新
-bash-4.2$ sudo yum makecache
现在就可以装工具了
-bash-4.2$ sudo yum install tree -y
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