# ubuntu/debian：
apt-get install git -y
apt-get update
apt-get install git -y● bash: curl: command not found
apt update && apt install -y curl● -bash: wget: command not found
apt update && apt install -y wget● 查询各ip到你服务器的连接数
netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -nr● tcp丢包率测试
apt install hping3
hping3 -S -p 22 -c 100 <目标服务器IP>