● bash: git: command not found
# centos：
yum install git -y
----------
# ubuntu/debian：
apt-get install git -y
apt-get update
apt-get install git -y● bash: curl: command not found
# ubuntu/debian：
apt-get update -y && apt-get install curl -y
apt update -y && apt install curl -y
----------
# centos：
yum update -y && yum install curl -y● -bash: wget: command not found
# ubuntu/debian：
apt-get update -y
apt-get install wget -y
----------
# centos：
yum update -y
yum install wget -y● 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