正常情况下下载sz，如果存在会自动覆盖，不用加-y
rz上传命令，如果已经存在文件了，那么默认不会执行上传，要-y覆盖才可以
[root@szxjdw01-a-pro-14 ~]# cd /data/backup/war/ [root@szxjdw01-a-pro-14 war]# ll total 308888 -rw-r--r-- 1 root root 79681963 Aug 4 14:59 test.tar.gz [root@test war]# rz rz waiting to receive. Starting zmodem transfer. Press Ctrl+C to cancel. Transferring jdwin-ucenter-rpc-service-assembly.tar.gz... jdwin-ucenter-rpc-service-assembly.tar.gz was skipped [root@test war]# rz -y rz waiting to receive. Starting zmodem transfer. Press Ctrl+C to cancel. Transferring jdwin-ucenter-rpc-service-assembly.tar.gz... 100% 77814 KB 855 KB/sec 00:01:31 0 Errors [root@test war]# ll total 308888 -rw-r--r-- 1 root root 79681952 Aug 4 15:53 test.tar.gz