我浏览了许多不同的主题，但没有找到解决问题的答案。我在Ubuntu服务器上创建了2个bash脚本，并试图定期执行它们。看来它们正在运行，但它们什么也没产生。它们是可执行的：
drwxr-xr-x 14 root root 4096 Mar 14 18:02 ..
-rwxr-xr-x 1 root root 2623 Apr 16 21:18 backup.pl
-rw-r--r-- 1 root root 87066352 May 10 21:37 full_site_backup-10-4-2018.tar.gz
-rwxr-xr-x 1 root root 530 May 11 20:21 checkHealth.sh
drwxr-xr-x 2 root root 4096 May 11 20:35 .
所以这是我的脚本之一：
#!/bin/bash
# log stdout and stderr to two different files
exec >>/var/log/test.log 2>>/var/log/test.err.log
# ...and log every command we try to execute to stderr (aka looog.err.log)
# set -x
CODE=$(curl -s -o /dev/null -I -A "myuseragent" -w "%{http_code}" https://www.xxxxxxxxxxxxx.xxx/xxxx)
DATE=$(date)
if [ $CODE -gt 300 ]
then
service mysql restart
service tomcat8 restart
>&2 echo "$DATE - KO !!!!!! code retour $CODE"
else
echo "$DATE - OK, code $CODE"
fi
这是我的sudo crontab -e：
# m h dom mon dow command
0 2 * * * root /usr/bin/perl /var/backup/backup.pl
* * * * * root /bin/sh /var/backup/checkHealth.sh
这是我的sudo tail -f /var/log/cron.log：
May 11 20:39:01 ns381471 CRON[10778]: (root) CMD (root /bin/sh /var/backup/checkHealth.sh)
May 11 20:39:26 ns381471 crontab[10823]: (root) BEGIN EDIT (root)
May 11 20:40:01 ns381471 CRON[10880]: (root) CMD (root /bin/sh /var/backup/checkHealth.sh)
May 11 20:40:01 ns381471 CRON[10879]: (root) CMD (/usr/local/rtm/bin/rtm 2 > /dev/null 2> /dev/null)
May 11 20:40:30 ns381471 crontab[10823]: (root) END EDIT (root)
May 11 20:41:01 ns381471 CRON[10974]: (root) CMD (/usr/local/rtm/bin/rtm 2 > /dev/null 2> /dev/null)
May 11 20:41:01 ns381471 CRON[10975]: (root) CMD (root /bin/sh /var/backup/checkHealth.sh)
May 11 20:42:01 ns381471 CRON[11070]: (root) CMD (/usr/local/rtm/bin/rtm 2 > /dev/null 2> /dev/null)
May 11 20:42:01 ns381471 CRON[11071]: (root) CMD (root /bin/sh /var/backup/checkHealth.sh)
任何帮助，将不胜感激。谢谢