gdb本地安装方法：

1.在有互联网机器下载rpm包

mkdir ./gdb_rpms

sudo yum install gdb --downloadonly --downloaddir=./gdb_rpms

scp -rp gdb_rpms xin@192.168.1.225:~/

2.在需要本地安装机器进行本地安装

sudo yum -y localinstall /home/xin/gdb_rpms/*.rpm


iperf3本地安装方法：

sudo yum install iperf3 --downloadonly --downloaddir=./iperf3_rpms

sudo yum -y localinstall /home/xin/iperf3_rpms/*.rpm