在定时任务里写个备份，按日期生成日志
0 9 * * * /home/oracle/dbbackup.sh >> /home/oracle/dbbackup_`date +i%Y%m%d`.log
结果死活报错：
/bin/sh: -c: line 0: unexpected EOF while looking for matching ``' /bin/sh: -c: line 1: syntax error: unexpected end of file
放狗结果：
https://superuser.com/questions/1095645/unexpected-eof-while-looking-for-matching-for-cron-job
改为这样，正常了
0 9 * * * /home/oracle/dbbackup.sh >> "/home/oracle/dbbackup_`date +\%Y\%m\%d`.log"