解決 centos yum 錯誤訊息 "http://mirror.centos.org/centos/6/SCL/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found""

# yum remove centos-release-SCL
# yum install centos-release-scl


reference:https://www.pistolfly.com/weblog/2016/05/httpmirror-centos-orgcentos6sclx86_64repodatarepomd-xml-errno-14-pycurl-error-22-the-requested-url-returned-error-404-not-found.html