crontab 默认编辑器为vi，不支持foldenable
#crontab -e Error detected while processing /root/.vimrc: line 57: E518: Unknown option: foldenable Press ENTER or type command to continue crontab: installing new crontab
将默认编辑器改为vim即可解决
export EDITOR=/usr/bin/vim
将这句话加入/root/.bashrc