bug fix

ChangeMirrors.sh

@@ -2113,6 +2113,7 @@ function change_mirrors_RedHat() {
     ## 使用官方源
     if [[ "${USE_OFFICIAL_SOURCE}" == "true" ]]; then
         ## CentOS 停服专用
+        cd $Dir_YumRepos
         if [[ "${SYSTEM_JUDGMENT}" == "${SYSTEM_CENTOS}" ]]; then
             sed -i "s|^#baseurl=http|baseurl=${WEB_PROTOCOL}|g" CentOS-*
             sed -i 's|^mirrorlist=|#mirrorlist=|g' CentOS-*