需要安装一个软件，步骤如下：
第一步，找出软件的完整名称；
第二步，安装该软件；
第三步，执行sz命令。
参考下面的执行过程
[root@mylinux ~]# yum provides lrzsz* Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile lrzsz-0.12.20-27.1.el6.x86_64 : The lrz and lsz modem communications programs Repo : base Matched from: Other : lrzsz(x86-64) = 0.12.20-27.1.el6 Other : lrzsz = 0.12.20-27.1.el6 [root@mylinux ~]# yum install lrzsz-0.12.20-27.1.el6.x86_64 Loaded plugins: fastestmirror Setting up Install Process Loading mirror speeds from cached hostfile Resolving Dependencies --> Running transaction check ---> Package lrzsz.x86_64 0:0.12.20-27.1.el6 will be installed --> Finished Dependency Resolution Dependencies Resolved ================================================================================================================================================================================================================= Package Arch Version Repository Size ================================================================================================================================================================================================================= Installing: lrzsz x86_64 0.12.20-27.1.el6 base 71 k Transaction Summary ================================================================================================================================================================================================================= Install 1 Package(s) Total download size: 71 k Installed size: 159 k Is this ok [y/N]: y Downloading Packages: lrzsz-0.12.20-27.1.el6.x86_64.rpm | 71 kB 00:00 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : lrzsz-0.12.20-27.1.el6.x86_64 1/1 Verifying : lrzsz-0.12.20-27.1.el6.x86_64 1/1 Installed: lrzsz.x86_64 0:0.12.20-27.1.el6 Complete! [root@mylinux ~]# [root@mylinux ~]# sz /opt/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.3.jar
最后使用sz命令加上需要下载的文件即可，xshell5会提示如下：
直接保存即可。