运行时，pip3.8我的终端中出现以下警告
WARNING: The script pip3.8 is installed in '/usr/local/bin' which is not on PATH.
Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed pip-21.1.1 setuptools-56.0.0
WARNING: Running pip as root will break packages and permissions. You should install packages reliably by using venv: https://pip.pypa.io/warnings/venv
在centos 7上如何解决这个问题？