which: no virtualenv-clone in (/home/myproject/env2/bin:/usr/lib64/qt3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin)ERROR: virtualenvwrapper could not find virtualenv-clone in your path
A:pip install virtualenv-clone
9.退出虚拟环境：deactivate
10.删除虚拟环境：rmvirtualenv [虚拟环境名称]
[root@localhost ~]# rmvirtualenv env2
Removing env2...
注：
flask安装在virtualenv中pip install Flask即可
virtualenv --python=/usr/local/bin/python2 venv