普通用户下使用sudo获取root权限，root用户直接安装：
[mall@VM_0_7_centos ~]$ sudo yum -y install lrzsz Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile docker-ce-stable | 3.5 kB 00:00:00 epel | 5.3 kB 00:00:00 extras | 2.9 kB 00:00:00 os | 3.6 kB 00:00:00 updates | 2.9 kB 00:00:00 (1/2): epel/7/x86_64/updateinfo | 1.0 MB 00:00:00 (2/2): epel/7/x86_64/primary_db | 6.9 MB 00:00:01 Resolving Dependencies --> Running transaction check ---> Package lrzsz.x86_64 0:0.12.20-36.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved ======================================================================================================================================================================== Package Arch Version Repository Size ======================================================================================================================================================================== Installing: lrzsz x86_64 0.12.20-36.el7 os 78 k Transaction Summary ======================================================================================================================================================================== Install 1 Package Total download size: 78 k Installed size: 181 k Downloading packages: lrzsz-0.12.20-36.el7.x86_64.rpm | 78 kB 00:00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : lrzsz-0.12.20-36.el7.x86_64 1/1 Verifying : lrzsz-0.12.20-36.el7.x86_64 1/1 Installed: lrzsz.x86_64 0:0.12.20-36.el7 Complete!
就这么简单，现在你可以开始使用rz命令把东西往服务器上放了。