在线安装tree命令：
yum -y install tree
但是在线包总是下载失败：
Repository epel is listed more than once in the configuration Repository epel-debuginfo is listed more than once in the configuration Repository epel-source is listed more than once in the configuration Loading mirror speeds from cached hostfile * base: mirrors.aliyun.com * centos-sclo-rh: ftp.sjtu.edu.cn * centos-sclo-sclo: mirror.lzu.edu.cn * epel: mirrors.aliyun.com * extras: mirrors.aliyun.com * updates: mirrors.aliyun.com http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.aliyun.com; 未知的错误" 正在尝试其它镜像。 http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.aliyuncs.com; 未知的错误" 正在尝试其它镜像。 http://mirrors.tuna.tsinghua.edu.cn/centos/7.9.2009/sclo/x86_64/rh/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.tuna.tsinghua.edu.cn; 未知的错误" 正在尝试其它镜像。 http://ftp.sjtu.edu.cn/centos/7.9.2009/sclo/x86_64/rh/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: ftp.sjtu.edu.cn; 未知的错误" 正在尝试其它镜像。 http://mirrors.cn99.com/centos/7.9.2009/sclo/x86_64/rh/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.cn99.com; 未知的错误" 正在尝试其它镜像。 http://mirrors.neusoft.edu.cn/centos/7.9.2009/sclo/x86_64/rh/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.neusoft.edu.cn; 未知的错误" 正在尝试其它镜像。 http://mirror.lzu.edu.cn/centos/7.9.2009/sclo/x86_64/rh/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirror.lzu.edu.cn; 未知的错误" 正在尝试其它镜像。 http://mirrors.163.com/centos/7.9.2009/sclo/x86_64/rh/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.163.com; 未知的错误" 正在尝试其它镜像。 http://mirrors.bfsu.edu.cn/centos/7.9.2009/sclo/x86_64/rh/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.bfsu.edu.cn; 未知的错误" 正在尝试其它镜像。 http://mirrors.cqu.edu.cn/CentOS/7.9.2009/sclo/x86_64/rh/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.cqu.edu.cn; 未知的错误" 正在尝试其它镜像。 http://mirrors.huaweicloud.com/centos/7.9.2009/sclo/x86_64/rh/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.huaweicloud.com; 未知的错误" 正在尝试其它镜像。 http://mirrors.nju.edu.cn/centos/7.9.2009/sclo/x86_64/rh/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.nju.edu.cn; 未知的错误" 正在尝试其它镜像。 http://mirrors.tuna.tsinghua.edu.cn/centos/7.9.2009/sclo/x86_64/sclo/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.tuna.tsinghua.edu.cn; 未知的错误" 正在尝试其它镜像。 http://mirrors.bupt.edu.cn/centos/7.9.2009/sclo/x86_64/sclo/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.bupt.edu.cn; 未知的错误" 正在尝试其它镜像。 http://mirrors.jlu.edu.cn/centos/7.9.2009/sclo/x86_64/sclo/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.jlu.edu.cn; 未知的错误" 正在尝试其它镜像。 http://mirrors.ustc.edu.cn/centos/7.9.2009/sclo/x86_64/sclo/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.ustc.edu.cn; 未知的错误" 正在尝试其它镜像。 http://mirror.lzu.edu.cn/centos/7.9.2009/sclo/x86_64/sclo/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirror.lzu.edu.cn; 未知的错误" 正在尝试其它镜像。 http://mirrors.163.com/centos/7.9.2009/sclo/x86_64/sclo/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.163.com; 未知的错误" 正在尝试其它镜像。 http://mirrors.bfsu.edu.cn/centos/7.9.2009/sclo/x86_64/sclo/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.bfsu.edu.cn; 未知的错误" 正在尝试其它镜像。 http://mirrors.cqu.edu.cn/CentOS/7.9.2009/sclo/x86_64/sclo/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.cqu.edu.cn; 未知的错误" 正在尝试其它镜像。 http://mirrors.huaweicloud.com/centos/7.9.2009/sclo/x86_64/sclo/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.huaweicloud.com; 未知的错误" 正在尝试其它镜像。 http://mirrors.nju.edu.cn/centos/7.9.2009/sclo/x86_64/sclo/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.nju.edu.cn; 未知的错误" 正在尝试其它镜像。 http://mirrors.aliyun.com/epel/7/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.aliyun.com; 未知的错误" 正在尝试其它镜像。 http://mirrors.aliyuncs.com/epel/7/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.aliyuncs.com; 未知的错误" 正在尝试其它镜像。 http://mirrors.aliyun.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.aliyun.com; 未知的错误" 正在尝试其它镜像。 http://mirrors.aliyuncs.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.aliyuncs.com; 未知的错误" 正在尝试其它镜像。 http://mirrors.aliyun.com/centos/7/updates/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.aliyun.com; 未知的错误" 正在尝试其它镜像。 http://mirrors.aliyuncs.com/centos/7/updates/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.aliyuncs.com; 未知的错误" 正在尝试其它镜像。 正在解决依赖关系 --> 正在检查事务 ---> 软件包 tree.x86_64.0.1.6.0-10.el7 将被 安装 --> 解决依赖关系完成 依赖关系解决 ============================================================================================================================================================ Package 架构 版本 源 大小 ============================================================================================================================================================ 正在安装: tree x86_64 1.6.0-10.el7 base 46 k 事务概要 ============================================================================================================================================================ 安装 1 软件包 总下载量：46 k 安装大小：87 k Downloading packages: Delta RPMs disabled because /usr/bin/applydeltarpm not installed. tree-1.6.0-10.el7.x86_64.rpm FAILED http://mirrors.aliyun.com/centos/7/os/x86_64/Packages/tree-1.6.0-10.el7.x86_64.rpm: [Errno 14] curl#6 - "Could not resolve host: mirrors.aliyun.com; Unknown error" 正在尝试其它镜像。 tree-1.6.0-10.el7.x86_64.rpm FAILED http://mirrors.aliyuncs.com/centos/7/os/x86_64/Packages/tree-1.6.0-10.el7.x86_64.rpm: [Errno 14] curl#6 - "Could not resolve host: mirrors.aliyuncs.com; Unknown error" 正在尝试其它镜像。 Error downloading packages: tree-1.6.0-10.el7.x86_64: [Errno 256] No more mirrors to try.
所以需要采用离线安装方式：
离线包获取地址：https://developer.aliyun.com/packageSearch?word=tree
然后使用命令安装本地yum包：
yum localinstall tree-1.7.0-15.el8.x86_64.rpm
yum localinstall tree-1.7.0-15.el8.x86_64.rpm 已加载插件：fastestmirror Repository epel is listed more than once in the configuration Repository epel-debuginfo is listed more than once in the configuration Repository epel-source is listed more than once in the configuration 正在检查 tree-1.7.0-15.el8.x86_64.rpm: tree-1.7.0-15.el8.x86_64 tree-1.7.0-15.el8.x86_64.rpm 将被安装 正在解决依赖关系 --> 正在检查事务 ---> 软件包 tree.x86_64.0.1.7.0-15.el8 将被 安装 --> 解决依赖关系完成 依赖关系解决 ============================================================================================================================================================ Package 架构 版本 源 大小 ============================================================================================================================================================ 正在安装: tree x86_64 1.7.0-15.el8 /tree-1.7.0-15.el8.x86_64 109 k 事务概要 ============================================================================================================================================================ 安装 1 软件包 总计：109 k 安装大小：109 k Is this ok [y/d/N]: y Downloading packages: Running transaction check Running transaction test Transaction test succeeded Running transaction 正在安装 : tree-1.7.0-15.el8.x86_64 1/1 验证中 : tree-1.7.0-15.el8.x86_64 1/1 已安装: tree.x86_64 0:1.7.0-15.el8 完毕！
标签：x86,centos,mirrors,离线,tree,sclo,64,edu,com From： https://www.cnblogs.com/hankuikui/p/17987042