linux计划任务

[root@sky ~]# atq
[root@sky ~]# at 00:25
at> cal >> /tmp/test-at.txt
at> date /tmp/test-at.txt
at> <EOT>
job 10 at Sun Nov 29 00:25:00 2015
[root@sky ~]# atq
10      Sun Nov 29 00:25:00 2015 a root
[root@sky ~]# at -c 10 | tail -6
}
${SHELL:-/bin/sh} << ‘marcinDELIMITER25c3ebf4‘
cal >> /tmp/test-at.txt
date /tmp/test-at.txt

marcinDELIMITER25c3ebf4
[root@sky ~]#
[root@sky ~]# at -q g teatime tomorrow
at> cal >> /tmp/test-at.txt
at> <EOT>
job 11 at Mon Nov 30 16:00:00 2015
[root@sky ~]# at -q g 17:00 tomorrow
at> cal >> /tmp/test-at.txt
at> <EOT>
job 12 at Mon Nov 30 17:00:00 2015
[root@sky ~]# at -q b 17:00 tomorrow
at> cal >> /tmp/test-at.txt
at> <EOT>
job 13 at Mon Nov 30 17:00:00 2015
[root@sky ~]# atq
10      Sun Nov 29 00:25:00 2015 a root
11      Mon Nov 30 16:00:00 2015 g root
12      Mon Nov 30 17:00:00 2015 g root
13      Mon Nov 30 17:00:00 2015 b root
[root@sky ~]# atrm 12
您在 /var/spool/mail/root 中有新邮件
[root@sky ~]# atq
10      Sun Nov 29 00:25:00 2015 a root 

11      Mon Nov 30 16:00:00 2015 g root
13      Mon Nov 30 17:00:00 2015 b root
[root@sky ~]#

[root@sky /]# echo "cal >> /tmp/test-at.txt" | at 01:38
job 14 at Sun Nov 29 01:38:00 2015
[root@sky /]# atq
11      Mon Nov 30 16:00:00 2015 g root
13      Mon Nov 30 17:00:00 2015 b root
14      Sun Nov 29 01:38:00 2015 a root
[root@sky /]#

[root@sky /]# which tar
/bin/tar
[root@sky /]# which bash
/bin/bash

[root@sky /]# cat 1.sh
#!/bin/bash
a=`date +%Y%m%d`
/bin/tar -zPcf /$a.tar.gz /var/log/*
[root@sky /]# crontab -l
35  00 29  11   *      /bin/date >> /time.txt     （11月29日0点35分执行）
35  00 1-5 11   *      /bin/date >> /time.txt     （11月1号到5号0点35分执行）
*/1 *  *   *    *      /bin/date >> /time.txt     （每隔一分钟执行一次）
27  01 *   *    1,3,5  /bin/bash /1.sh            （每周1、3、5的1点27分执行一次1.sh脚本）
[root@sky/]#