redhat7.6 yum无法注册，更换的yum包

[{"title":"（ 14 个子文件 1.81MB ） redhat7.6 yum无法注册，更换的yum包","children":[{"title":"._python-kitchen-1.1.1-5.el7.noarch.rpm <span style='color:#111;'> 395B </span>","children":null,"spread":false},{"title":"._python-chardet-2.2.1-3.el7.noarch.rpm <span style='color:#111;'> 395B </span>","children":null,"spread":false},{"title":"python-chardet-2.2.1-3.el7.noarch.rpm <span style='color:#111;'> 227.00KB </span>","children":null,"spread":false},{"title":"yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm <span style='color:#111;'> 33.93KB </span>","children":null,"spread":false},{"title":"yum-3.4.3-163.el7.centos.noarch.rpm <span style='color:#111;'> 1.24MB </span>","children":null,"spread":false},{"title":"._yum-updateonboot-1.1.31-52.el7.noarch.rpm <span style='color:#111;'> 455B </span>","children":null,"spread":false},{"title":"python-kitchen-1.1.1-5.el7.noarch.rpm <span style='color:#111;'> 266.61KB </span>","children":null,"spread":false},{"title":"._yum-utils-1.1.31-52.el7.noarch.rpm <span style='color:#111;'> 448B </span>","children":null,"spread":false},{"title":"._yum-metadata-parser-1.1.4-10.el7.x86_64.rpm <span style='color:#111;'> 457B </span>","children":null,"spread":false},{"title":"._yum-3.4.3-163.el7.centos.noarch.rpm <span style='color:#111;'> 449B </span>","children":null,"spread":false},{"title":"._yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm <span style='color:#111;'> 463B </span>","children":null,"spread":false},{"title":"yum-metadata-parser-1.1.4-10.el7.x86_64.rpm <span style='color:#111;'> 27.68KB </span>","children":null,"spread":false},{"title":"yum-utils-1.1.31-52.el7.noarch.rpm <span style='color:#111;'> 121.45KB </span>","children":null,"spread":false},{"title":"yum-updateonboot-1.1.31-52.el7.noarch.rpm <span style='color:#111;'> 26.91KB </span>","children":null,"spread":false}],"spread":true}]