centos任务计划和执行脚本【已解决】

经纬联科

本人小白一只，想要在centos下制定任务计划  应该怎么写呢？

每天凌晨5点执行以下3个命令：
service ss5 stop
/usr/sbin/ss5 -t -m -b  1.1.1.2  -u  user2
/usr/sbin/ss5 -t -m -b  1.1.1.1  -u  user1

--------------------
一个朋友的回复：
cat<<EOF>>/root/test.sh
service ss5 stop
/usr/sbin/ss5 -t -m -b  1.1.1.2  -u  user2
/usr/sbin/ss5 -t -m -b  1.1.1.1  -u  user1
EOF

chmod +x /root/test.sh

echo "* 5 * * * root /root/test.sh" >>/etc/crontab
/etc/init.d/crond restart

-----------------
2015-11-19更新：
根据 seanking1987 的回复更正：
echo "0 5 * * * root /root/test.sh" >>/etc/crontab
/etc/init.d/crond restart

seanking1987

百度查询crontab

经纬联科

感谢回复回复 2# seanking1987


   

经纬联科

* 0-23/6 * * * root /root/test.sh

改成这个的话，为什么在18点的时候没有执行这个任务呢？
回复 2# seanking1987


   

seanking1987

回复 4# 经纬联科

可以查看/var/log/cron确认脚本的执行情况
* */6 * * * exec shell
* 0,6,12,18 * * * exec shell
   

经纬联科

回复 5# seanking1987


[root@msgin ~]# service crond status
crond (pid  16687) is running...
[root@msgin ~]# cat /etc/crontab
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
HOME=/

# For details see man 4 crontabs

# Example of job definition:
# .---------------- minute (0 - 59)
# |  .------------- hour (0 - 23)
# |  |  .---------- day of month (1 - 31)
# |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...
# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# |  |  |  |  |
# *  *  *  *  * user-name command to be executed

* 0,6,12,18 * * * root /root/test.sh
[root@msgin ~]# cat /var/log/cron
Nov 17 22:01:01 msgin CROND[15453]: (root) CMD (run-parts /etc/cron.hourly)
Nov 17 22:01:02 msgin run-parts(/etc/cron.hourly)[15453]: starting 0anacron
Nov 17 22:01:02 msgin run-parts(/etc/cron.hourly)[15796]: finished 0anacron
Nov 17 23:00:01 msgin CROND[26337]: (root) CMD (/root/test.sh)
Nov 17 23:01:01 msgin CROND[24113]: (root) CMD (run-parts /etc/cron.hourly)
Nov 17 23:01:01 msgin CROND[24114]: (root) CMD (/root/test.sh)
Nov 17 23:01:01 msgin run-parts(/etc/cron.hourly)[24113]: starting 0anacron
Nov 17 23:01:01 msgin anacron[24140]: Anacron started on 2015-11-18
Nov 17 23:01:01 msgin run-parts(/etc/cron.hourly)[24143]: finished 0anacron
Nov 17 23:01:01 msgin anacron[24140]: Jobs will be executed sequentially
Nov 17 23:01:01 msgin anacron[24140]: Normal exit (0 jobs run)
Nov 17 23:02:01 msgin CROND[24084]: (root) CMD (/root/test.sh)
Nov 17 23:03:01 msgin CROND[25052]: (root) CMD (/root/test.sh)
Nov 17 23:04:01 msgin CROND[30435]: (root) CMD (/root/test.sh)
Nov 17 23:05:01 msgin CROND[21281]: (root) CMD (/root/test.sh)
Nov 17 23:06:01 msgin CROND[26112]: (root) CMD (/root/test.sh)
Nov 17 23:07:01 msgin CROND[25774]: (root) CMD (/root/test.sh)
Nov 17 23:08:01 msgin CROND[12103]: (root) CMD (/root/test.sh)
Nov 17 23:09:01 msgin CROND[27459]: (root) CMD (/root/test.sh)
Nov 17 23:10:01 msgin CROND[16196]: (root) CMD (/root/test.sh)
Nov 17 23:11:01 msgin CROND[32175]: (root) CMD (/root/test.sh)
Nov 17 23:12:01 msgin CROND[31309]: (root) CMD (/root/test.sh)
Nov 17 23:13:01 msgin CROND[8999]: (root) CMD (/root/test.sh)
Nov 17 23:14:01 msgin CROND[14174]: (root) CMD (/root/test.sh)
Nov 17 23:15:01 msgin CROND[2073]: (root) CMD (/root/test.sh)
Nov 17 23:16:01 msgin CROND[29983]: (root) CMD (/root/test.sh)
Nov 17 23:17:01 msgin CROND[4367]: (root) CMD (/root/test.sh)
Nov 17 23:18:01 msgin CROND[9513]: (root) CMD (/root/test.sh)
Nov 17 23:19:01 msgin CROND[1109]: (root) CMD (/root/test.sh)
Nov 17 23:20:01 msgin CROND[5465]: (root) CMD (/root/test.sh)
Nov 17 23:21:01 msgin CROND[7567]: (root) CMD (/root/test.sh)
Nov 17 23:22:01 msgin CROND[23730]: (root) CMD (/root/test.sh)
Nov 17 23:23:01 msgin CROND[28724]: (root) CMD (/root/test.sh)
Nov 17 23:24:02 msgin CROND[3209]: (root) CMD (/root/test.sh)
Nov 17 23:25:01 msgin CROND[9895]: (root) CMD (/root/test.sh)
Nov 17 23:26:02 msgin CROND[8244]: (root) CMD (/root/test.sh)
Nov 17 23:27:01 msgin CROND[12557]: (root) CMD (/root/test.sh)
Nov 17 23:28:01 msgin CROND[5532]: (root) CMD (/root/test.sh)
Nov 17 23:29:01 msgin CROND[24605]: (root) CMD (/root/test.sh)
Nov 17 23:30:01 msgin CROND[26674]: (root) CMD (/root/test.sh)
Nov 17 23:31:01 msgin CROND[31578]: (root) CMD (/root/test.sh)
Nov 17 23:32:02 msgin CROND[13684]: (root) CMD (/root/test.sh)
Nov 17 23:33:01 msgin CROND[31608]: (root) CMD (/root/test.sh)
Nov 17 23:34:01 msgin CROND[24624]: (root) CMD (/root/test.sh)
Nov 17 23:35:01 msgin CROND[13296]: (root) CMD (/root/test.sh)
Nov 17 23:36:01 msgin CROND[17066]: (root) CMD (/root/test.sh)
Nov 17 23:37:01 msgin CROND[15935]: (root) CMD (/root/test.sh)
Nov 17 23:38:01 msgin CROND[10645]: (root) CMD (/root/test.sh)
Nov 17 23:39:02 msgin CROND[30288]: (root) CMD (/root/test.sh)
Nov 17 23:40:01 msgin CROND[21308]: (root) CMD (/root/test.sh)
Nov 17 23:41:01 msgin CROND[13186]: (root) CMD (/root/test.sh)
Nov 17 23:42:01 msgin CROND[2885]: (root) CMD (/root/test.sh)
Nov 17 23:43:01 msgin CROND[2320]: (root) CMD (/root/test.sh)
Nov 17 23:44:01 msgin CROND[16305]: (root) CMD (/root/test.sh)
Nov 17 23:45:01 msgin CROND[15389]: (root) CMD (/root/test.sh)
Nov 17 23:46:01 msgin CROND[15767]: (root) CMD (/root/test.sh)
Nov 17 23:47:01 msgin CROND[7371]: (root) CMD (/root/test.sh)
Nov 17 23:48:01 msgin CROND[24145]: (root) CMD (/root/test.sh)
Nov 17 23:49:01 msgin CROND[23434]: (root) CMD (/root/test.sh)
Nov 17 23:50:01 msgin CROND[21870]: (root) CMD (/root/test.sh)
Nov 17 23:51:01 msgin CROND[4389]: (root) CMD (/root/test.sh)
Nov 17 23:52:02 msgin CROND[24360]: (root) CMD (/root/test.sh)
Nov 17 23:53:01 msgin CROND[29818]: (root) CMD (/root/test.sh)
Nov 17 23:54:01 msgin CROND[6351]: (root) CMD (/root/test.sh)
Nov 17 23:55:01 msgin CROND[22182]: (root) CMD (/root/test.sh)
Nov 17 23:56:01 msgin CROND[8531]: (root) CMD (/root/test.sh)
Nov 17 23:57:01 msgin CROND[2601]: (root) CMD (/root/test.sh)
Nov 17 23:58:01 msgin CROND[10499]: (root) CMD (/root/test.sh)
Nov 17 23:59:01 msgin CROND[17607]: (root) CMD (/root/test.sh)
Nov 18 00:01:01 msgin CROND[22369]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 00:01:01 msgin run-parts(/etc/cron.hourly)[22369]: starting 0anacron
Nov 18 00:01:01 msgin anacron[22576]: Anacron started on 2015-11-18
Nov 18 00:01:01 msgin anacron[22576]: Jobs will be executed sequentially
Nov 18 00:01:01 msgin anacron[22576]: Normal exit (0 jobs run)
Nov 18 00:01:01 msgin run-parts(/etc/cron.hourly)[22579]: finished 0anacron
Nov 18 01:01:01 msgin CROND[23280]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 01:01:01 msgin run-parts(/etc/cron.hourly)[23280]: starting 0anacron
Nov 18 01:01:01 msgin anacron[23299]: Anacron started on 2015-11-18
Nov 18 01:01:01 msgin anacron[23299]: Jobs will be executed sequentially
Nov 18 01:01:01 msgin anacron[23299]: Normal exit (0 jobs run)
Nov 18 01:01:01 msgin run-parts(/etc/cron.hourly)[23301]: finished 0anacron
Nov 18 02:01:01 msgin CROND[8842]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 02:01:01 msgin run-parts(/etc/cron.hourly)[8842]: starting 0anacron
Nov 18 02:01:02 msgin anacron[10579]: Anacron started on 2015-11-18
Nov 18 02:01:02 msgin run-parts(/etc/cron.hourly)[10582]: finished 0anacron
Nov 18 02:01:02 msgin anacron[10579]: Will run job `cron.daily' in 31 min.
Nov 18 02:01:02 msgin anacron[10579]: Jobs will be executed sequentially
Nov 18 02:32:02 msgin anacron[10579]: Job `cron.daily' started
Nov 18 02:32:02 msgin run-parts(/etc/cron.daily)[15560]: starting logrotate
Nov 18 02:32:02 msgin run-parts(/etc/cron.daily)[17220]: finished logrotate
Nov 18 02:32:02 msgin anacron[10579]: Job `cron.daily' terminated
Nov 18 02:32:02 msgin anacron[10579]: Normal exit (1 job run)
Nov 18 03:01:01 msgin CROND[1097]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 03:01:01 msgin run-parts(/etc/cron.hourly)[1097]: starting 0anacron
Nov 18 03:01:01 msgin run-parts(/etc/cron.hourly)[1111]: finished 0anacron
Nov 18 04:01:01 msgin CROND[10829]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 04:01:01 msgin run-parts(/etc/cron.hourly)[10829]: starting 0anacron
Nov 18 04:01:01 msgin run-parts(/etc/cron.hourly)[11659]: finished 0anacron
Nov 18 05:00:01 msgin CROND[29464]: (root) CMD (/root/test.sh)
Nov 18 05:01:01 msgin CROND[5840]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 05:01:01 msgin CROND[5846]: (root) CMD (/root/test.sh)
Nov 18 05:01:01 msgin run-parts(/etc/cron.hourly)[5840]: starting 0anacron
Nov 18 05:01:01 msgin run-parts(/etc/cron.hourly)[5912]: finished 0anacron
Nov 18 05:02:02 msgin CROND[25786]: (root) CMD (/root/test.sh)
Nov 18 05:03:01 msgin CROND[7653]: (root) CMD (/root/test.sh)
Nov 18 05:04:01 msgin CROND[8936]: (root) CMD (/root/test.sh)
Nov 18 05:05:01 msgin CROND[19968]: (root) CMD (/root/test.sh)
Nov 18 05:06:01 msgin CROND[14352]: (root) CMD (/root/test.sh)
Nov 18 05:07:01 msgin CROND[1427]: (root) CMD (/root/test.sh)
Nov 18 05:08:01 msgin CROND[17787]: (root) CMD (/root/test.sh)
Nov 18 05:09:01 msgin CROND[15048]: (root) CMD (/root/test.sh)
Nov 18 05:10:01 msgin CROND[9555]: (root) CMD (/root/test.sh)
Nov 18 05:11:01 msgin CROND[12247]: (root) CMD (/root/test.sh)
Nov 18 05:12:02 msgin CROND[22680]: (root) CMD (/root/test.sh)
Nov 18 05:13:01 msgin CROND[6906]: (root) CMD (/root/test.sh)
Nov 18 05:14:01 msgin CROND[22187]: (root) CMD (/root/test.sh)
Nov 18 05:15:01 msgin CROND[26713]: (root) CMD (/root/test.sh)
Nov 18 05:16:01 msgin CROND[32583]: (root) CMD (/root/test.sh)
Nov 18 05:17:01 msgin CROND[1145]: (root) CMD (/root/test.sh)
Nov 18 05:18:01 msgin CROND[19213]: (root) CMD (/root/test.sh)
Nov 18 05:19:01 msgin CROND[26760]: (root) CMD (/root/test.sh)
Nov 18 05:20:01 msgin CROND[16374]: (root) CMD (/root/test.sh)
Nov 18 05:21:01 msgin CROND[16591]: (root) CMD (/root/test.sh)
Nov 18 05:22:01 msgin CROND[8291]: (root) CMD (/root/test.sh)
Nov 18 05:23:01 msgin CROND[3881]: (root) CMD (/root/test.sh)
Nov 18 05:24:01 msgin CROND[27646]: (root) CMD (/root/test.sh)
Nov 18 05:25:01 msgin CROND[20198]: (root) CMD (/root/test.sh)
Nov 18 05:26:01 msgin CROND[6537]: (root) CMD (/root/test.sh)
Nov 18 05:27:01 msgin CROND[16965]: (root) CMD (/root/test.sh)
Nov 18 05:28:01 msgin CROND[2796]: (root) CMD (/root/test.sh)
Nov 18 05:29:01 msgin CROND[27584]: (root) CMD (/root/test.sh)
Nov 18 05:30:01 msgin CROND[8706]: (root) CMD (/root/test.sh)
Nov 18 05:31:01 msgin CROND[2099]: (root) CMD (/root/test.sh)
Nov 18 05:32:01 msgin CROND[24708]: (root) CMD (/root/test.sh)
Nov 18 05:33:01 msgin CROND[25527]: (root) CMD (/root/test.sh)
Nov 18 05:34:01 msgin CROND[6370]: (root) CMD (/root/test.sh)
Nov 18 05:35:01 msgin CROND[15082]: (root) CMD (/root/test.sh)
Nov 18 05:36:01 msgin CROND[17464]: (root) CMD (/root/test.sh)
Nov 18 05:37:02 msgin CROND[30480]: (root) CMD (/root/test.sh)
Nov 18 05:38:01 msgin CROND[23961]: (root) CMD (/root/test.sh)
Nov 18 05:39:01 msgin CROND[17974]: (root) CMD (/root/test.sh)
Nov 18 05:40:01 msgin CROND[24907]: (root) CMD (/root/test.sh)
Nov 18 05:41:01 msgin CROND[32581]: (root) CMD (/root/test.sh)
Nov 18 05:42:01 msgin CROND[8209]: (root) CMD (/root/test.sh)
Nov 18 05:43:01 msgin CROND[10373]: (root) CMD (/root/test.sh)
Nov 18 05:44:01 msgin CROND[18846]: (root) CMD (/root/test.sh)
Nov 18 05:45:01 msgin CROND[28974]: (root) CMD (/root/test.sh)
Nov 18 05:46:01 msgin CROND[19076]: (root) CMD (/root/test.sh)
Nov 18 05:47:01 msgin CROND[25999]: (root) CMD (/root/test.sh)
Nov 18 05:48:01 msgin CROND[30760]: (root) CMD (/root/test.sh)
Nov 18 05:49:01 msgin CROND[756]: (root) CMD (/root/test.sh)
Nov 18 05:50:01 msgin CROND[16731]: (root) CMD (/root/test.sh)
Nov 18 05:51:02 msgin CROND[13869]: (root) CMD (/root/test.sh)
Nov 18 05:52:01 msgin CROND[24884]: (root) CMD (/root/test.sh)
Nov 18 05:53:01 msgin CROND[19093]: (root) CMD (/root/test.sh)
Nov 18 05:54:01 msgin CROND[29305]: (root) CMD (/root/test.sh)
Nov 18 05:55:01 msgin CROND[7288]: (root) CMD (/root/test.sh)
Nov 18 05:56:01 msgin CROND[9144]: (root) CMD (/root/test.sh)
Nov 18 05:57:01 msgin CROND[23143]: (root) CMD (/root/test.sh)
Nov 18 05:58:01 msgin CROND[26652]: (root) CMD (/root/test.sh)
Nov 18 05:59:01 msgin CROND[8023]: (root) CMD (/root/test.sh)
Nov 18 06:01:01 msgin CROND[24350]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 06:01:01 msgin run-parts(/etc/cron.hourly)[24350]: starting 0anacron
Nov 18 06:01:01 msgin run-parts(/etc/cron.hourly)[24363]: finished 0anacron
Nov 18 07:01:01 msgin CROND[26322]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 07:01:01 msgin run-parts(/etc/cron.hourly)[26322]: starting 0anacron
Nov 18 07:01:01 msgin run-parts(/etc/cron.hourly)[27427]: finished 0anacron
Nov 18 08:01:01 msgin CROND[21521]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 08:01:01 msgin run-parts(/etc/cron.hourly)[21521]: starting 0anacron
Nov 18 08:01:01 msgin run-parts(/etc/cron.hourly)[22035]: finished 0anacron
Nov 18 09:01:01 msgin CROND[10427]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 09:01:01 msgin run-parts(/etc/cron.hourly)[10427]: starting 0anacron
Nov 18 09:01:01 msgin run-parts(/etc/cron.hourly)[10446]: finished 0anacron
Nov 18 10:01:02 msgin CROND[9551]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 10:01:02 msgin run-parts(/etc/cron.hourly)[9551]: starting 0anacron
Nov 18 10:01:02 msgin run-parts(/etc/cron.hourly)[9577]: finished 0anacron





   

seanking1987

回复 6# 经纬联科
=====================================
引用<<鸟哥的linux私房菜>>
下达 crontab -e 后，如果输入这一行，代表什么意思？
* 15 * * 1-5 /usr/local/bin/tea_time.sh
在每星期的 1~5 ，下午 3 点的每分钟，共执行 60 次 /usr/local/bin/tea_time.sh 这个档案。
要特别注意的是，每个星期 1~5 的3 点都会执行 60 次！很麻烦吧～是错误的写法～ 应该
是要写成：
30 15 * * 1-5 /usr/local/bin/tea_time.sh
========================================================
所以日志是打印执行60次，加个分钟就好了
0 5 * * * exec_shell  凌晨5点整执行
   

经纬联科

回复 7# seanking1987

谢谢，*换成0真的可以了。

[root@msgin ~]# cat /etc/crontab
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
HOME=/

# For details see man 4 crontabs

# Example of job definition:
# .---------------- minute (0 - 59)
# |  .------------- hour (0 - 23)
# |  |  .---------- day of month (1 - 31)
# |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...
# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# |  |  |  |  |
# *  *  *  *  * user-name command to be executed

0 0,6,12,18 * * * root /root/test.sh
[root@msgin ~]# cat /var/log/cron
Nov 18 17:01:02 msgin run-parts(/etc/cron.hourly)[11543]: starting 0anacron
Nov 18 17:01:02 msgin run-parts(/etc/cron.hourly)[11555]: finished 0anacron
Nov 18 18:00:01 msgin CROND[6710]: (root) CMD (/root/test.sh)
Nov 18 18:01:01 msgin CROND[11568]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 18:01:01 msgin run-parts(/etc/cron.hourly)[11568]: starting 0anacron
Nov 18 18:01:01 msgin run-parts(/etc/cron.hourly)[11585]: finished 0anacron
Nov 18 19:01:01 msgin CROND[12811]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 19:01:01 msgin run-parts(/etc/cron.hourly)[12811]: starting 0anacron
Nov 18 19:01:01 msgin run-parts(/etc/cron.hourly)[12826]: finished 0anacron
Nov 18 20:01:01 msgin CROND[29634]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 20:01:01 msgin run-parts(/etc/cron.hourly)[29634]: starting 0anacron
Nov 18 20:01:01 msgin run-parts(/etc/cron.hourly)[29645]: finished 0anacron
Nov 18 21:01:01 msgin CROND[21033]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 21:01:01 msgin run-parts(/etc/cron.hourly)[21033]: starting 0anacron
Nov 18 21:01:01 msgin run-parts(/etc/cron.hourly)[21049]: finished 0anacron
Nov 18 22:01:02 msgin CROND[20869]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 22:01:02 msgin run-parts(/etc/cron.hourly)[20869]: starting 0anacron
Nov 18 22:01:02 msgin run-parts(/etc/cron.hourly)[21435]: finished 0anacron
Nov 18 23:01:01 msgin CROND[13904]: (root) CMD (run-parts /etc/cron.hourly)
Nov 18 23:01:01 msgin run-parts(/etc/cron.hourly)[13904]: starting 0anacron
Nov 18 23:01:01 msgin run-parts(/etc/cron.hourly)[13915]: finished 0anacron
Nov 19 00:00:01 msgin CROND[16202]: (root) CMD (/root/test.sh)
Nov 19 00:01:01 msgin CROND[19968]: (root) CMD (run-parts /etc/cron.hourly)
Nov 19 00:01:01 msgin run-parts(/etc/cron.hourly)[19968]: starting 0anacron
Nov 19 00:01:01 msgin anacron[19988]: Anacron started on 2015-11-19
Nov 19 00:01:01 msgin anacron[19988]: Jobs will be executed sequentially
Nov 19 00:01:01 msgin anacron[19988]: Normal exit (0 jobs run)
Nov 19 00:01:01 msgin run-parts(/etc/cron.hourly)[19991]: finished 0anacron
Nov 19 01:01:01 msgin CROND[18155]: (root) CMD (run-parts /etc/cron.hourly)
Nov 19 01:01:02 msgin run-parts(/etc/cron.hourly)[18155]: starting 0anacron
Nov 19 01:01:02 msgin anacron[18183]: Anacron started on 2015-11-19
Nov 19 01:01:02 msgin run-parts(/etc/cron.hourly)[18189]: finished 0anacron
Nov 19 01:01:02 msgin anacron[18183]: Jobs will be executed sequentially
Nov 19 01:01:02 msgin anacron[18183]: Normal exit (0 jobs run)
Nov 19 02:01:01 msgin CROND[23908]: (root) CMD (run-parts /etc/cron.hourly)
Nov 19 02:01:01 msgin run-parts(/etc/cron.hourly)[23908]: starting 0anacron
Nov 19 02:01:01 msgin anacron[23925]: Anacron started on 2015-11-19
Nov 19 02:01:01 msgin run-parts(/etc/cron.hourly)[23927]: finished 0anacron
Nov 19 02:01:01 msgin anacron[23925]: Jobs will be executed sequentially
Nov 19 02:01:01 msgin anacron[23925]: Normal exit (0 jobs run)
Nov 19 03:01:01 msgin CROND[27434]: (root) CMD (run-parts /etc/cron.hourly)
Nov 19 03:01:01 msgin run-parts(/etc/cron.hourly)[27434]: starting 0anacron
Nov 19 03:01:01 msgin anacron[27453]: Anacron started on 2015-11-19
Nov 19 03:01:01 msgin anacron[27453]: Will run job `cron.daily' in 44 min.
Nov 19 03:01:01 msgin anacron[27453]: Jobs will be executed sequentially
Nov 19 03:01:01 msgin run-parts(/etc/cron.hourly)[27456]: finished 0anacron
Nov 19 03:45:01 msgin anacron[27453]: Job `cron.daily' started
Nov 19 03:45:01 msgin run-parts(/etc/cron.daily)[9031]: starting logrotate
Nov 19 03:45:01 msgin run-parts(/etc/cron.daily)[9264]: finished logrotate
Nov 19 03:45:01 msgin anacron[27453]: Job `cron.daily' terminated
Nov 19 03:45:01 msgin anacron[27453]: Normal exit (1 job run)
Nov 19 04:01:02 msgin CROND[1513]: (root) CMD (run-parts /etc/cron.hourly)
Nov 19 04:01:02 msgin run-parts(/etc/cron.hourly)[1513]: starting 0anacron
Nov 19 04:01:02 msgin run-parts(/etc/cron.hourly)[2722]: finished 0anacron
Nov 19 05:01:01 msgin CROND[9735]: (root) CMD (run-parts /etc/cron.hourly)
Nov 19 05:01:01 msgin run-parts(/etc/cron.hourly)[9735]: starting 0anacron
Nov 19 05:01:01 msgin run-parts(/etc/cron.hourly)[10845]: finished 0anacron
Nov 19 06:00:01 msgin CROND[4975]: (root) CMD (/root/test.sh)
Nov 19 06:01:01 msgin CROND[12389]: (root) CMD (run-parts /etc/cron.hourly)
Nov 19 06:01:01 msgin run-parts(/etc/cron.hourly)[12389]: starting 0anacron
Nov 19 06:01:01 msgin run-parts(/etc/cron.hourly)[12401]: finished 0anacron
Nov 19 07:01:01 msgin CROND[12688]: (root) CMD (run-parts /etc/cron.hourly)
Nov 19 07:01:01 msgin run-parts(/etc/cron.hourly)[12688]: starting 0anacron
Nov 19 07:01:01 msgin run-parts(/etc/cron.hourly)[12704]: finished 0anacron
Nov 19 08:01:01 msgin CROND[4216]: (root) CMD (run-parts /etc/cron.hourly)
Nov 19 08:01:01 msgin run-parts(/etc/cron.hourly)[4216]: starting 0anacron
Nov 19 08:01:01 msgin run-parts(/etc/cron.hourly)[4228]: finished 0anacron
Nov 19 09:01:02 msgin CROND[520]: (root) CMD (run-parts /etc/cron.hourly)
Nov 19 09:01:02 msgin run-parts(/etc/cron.hourly)[520]: starting 0anacron
Nov 19 09:01:02 msgin run-parts(/etc/cron.hourly)[559]: finished 0anacron
Nov 19 10:01:01 msgin CROND[6577]: (root) CMD (run-parts /etc/cron.hourly)
Nov 19 10:01:01 msgin run-parts(/etc/cron.hourly)[6577]: starting 0anacron
Nov 19 10:01:01 msgin run-parts(/etc/cron.hourly)[6594]: finished 0anacron
Nov 19 11:01:01 msgin CROND[3326]: (root) CMD (run-parts /etc/cron.hourly)
Nov 19 11:01:02 msgin run-parts(/etc/cron.hourly)[3326]: starting 0anacron
Nov 19 11:01:02 msgin run-parts(/etc/cron.hourly)[3346]: finished 0anacron
Nov 19 12:00:01 msgin CROND[2131]: (root) CMD (/root/test.sh)
Nov 19 12:01:02 msgin CROND[6667]: (root) CMD (run-parts /etc/cron.hourly)
Nov 19 12:01:02 msgin run-parts(/etc/cron.hourly)[6667]: starting 0anacron
Nov 19 12:01:02 msgin run-parts(/etc/cron.hourly)[6684]: finished 0anacron
Nov 19 13:01:01 msgin CROND[28537]: (root) CMD (run-parts /etc/cron.hourly)
Nov 19 13:01:01 msgin run-parts(/etc/cron.hourly)[28537]: starting 0anacron
Nov 19 13:01:01 msgin run-parts(/etc/cron.hourly)[28554]: finished 0anacron


还有个问题，这个日志怎么样设置只记录最近2天的日志呢？

seanking1987

回复 8# 经纬联科
这个是记录所有crontab记录的日志，我不知道系统是否有设置项可以设置几天自动清除，
但是对于系统记录的日志来说，保存两天实在是太少了，服务器的相关日志保存一年半载都是很正常的事。
如果实在想保存两天，可以用上crontab，每两天清空这个日志 cat /dev/null > /var/log/cron

   

经纬联科

回复 9# seanking1987
好的 谢谢