crontab | 易学教程

Bash script returns different value when run from cron job than from command line

阅读更多关于 Bash script returns different value when run from cron job than from command line

问题 I have a bash script that is intended to be run from cron. The script counts the words in document, and appends a line with the current time and the word count to a CSV file. In relevant part, the script is: EPOCH=$(date +"%s") WCC=$(wc -w ~/path/filename.txt | sed 's/\/Users\/username\/path\/filename.txt//' | sed 's/ //g') echo $EPOCH,$WCCH4 >> ~/path/wordcount-data.csv This script is run from cron with the following entry: 0 * * * * sh /Users/username/path/wordcount.sh The problem is that

Cron jobs terminate prematurely on amazon ec2 crontab

阅读更多关于 Cron jobs terminate prematurely on amazon ec2 crontab

问题 I am using amazon ec2 server and I have set up some cron jobs on crontab. Sample for setting up cron job 58 11 12 * * php /var/www/html/folder/index.php controller/function/parameter When I try crontab -l on putty they all appear and everything seems to be working fine. But cron jobs with lengthy execution time tend to stop prematurely without generating any error in log file. I am also setting the large execution time at the top of my php script ini_set('max_execution_time', 600000); I

Cron job works when run manually, but not from crontab

阅读更多关于 Cron job works when run manually, but not from crontab

问题 I made a script that uses forever to control node.js, its nothing fancy, but it works just the way I want it to when run manually, however when run from the Cron job @reboot nothing happens, I have the cron set to redirect stderr and stdout to a log file so I can try to figure it out, but the file never changes. Cron job: @reboot /sbin/ghost boot &> /home/mary/.ghost.log Content of Script: #!/bin/bash ########################################################### # This script is made to control

Cron job works when run manually, but not from crontab

阅读更多关于 Cron job works when run manually, but not from crontab

Crontab + ubuntu + java not working

阅读更多关于 Crontab + ubuntu + java not working

问题 If I directly run the bellow code in terminal it is working perfect. /usr/bin/java -jar /var/jboss-as-7.1.1.Final/standalone/email_linux/notification_18.jar But when I set the same as a crontab in ubuntu server then it is not working. */3 * * * * /usr/bin/java -jar /var/jboss-as-7.1.1.Final/standalone/email_linux/notification_18.jar Any one know why unexpected behavior? 回答1: The crontab task is executed under a different user from the one with which you are testing the call. JBoss depends on

How to give permission for the cron job file?

阅读更多关于 How to give permission for the cron job file?

问题 I have set the cron tab for my site. But I have got message in my mailing id like this "Permission denied" for the script. Can anyone help me telling what may be the problem. Thanks...... 回答1: You get this error while setting the crontab? or from a script running from the cron? If while setting the crontab, try this: You type: crontab -e You get: -bash: /usr/bin/crontab: Permission denied Problem: Your user is not in the cron group. Solution: As root, edit the /etc/group file, find the cron

如何在Django中开启一个定时任务

阅读更多关于如何在Django中开启一个定时任务

定时任务使用的场景很多，以定时生成静态首页为例。 1. 安装支持包： django-crontab 安装方式： pip install django-crontab 2. 注册定时应用在settings.INSTALLED_APPS中添加应用： INSTALLED_APPS = [ 'django_crontab', # 定时任务 ] 3. 定时任务crontab的时间设置格式定时时间基本格式 : 5个'*'符号：* * * * * 命令依次对应：分时日月周 M: 分钟（0-59）。每分钟用 * 或者 */1 表示 H：小时（0-23）。（0表示0点） D：天（1-31）。 m: 月（1-12）。 d: 一星期内的天（0~6，0为星期天）。示例：每1分钟执行一次myCommand * /1* * * * myCommand 每小时的第3和第15分钟执行 3,15 * * * * myCommand 在上午8点到11点的第3和第15分钟执行 3,15 8-11 * * * myCommand 每隔两天的上午8点到11点的第3和第15分钟执行 3,15 8-11 */2 * * myCommand 每周一上午8点到11点的第3和第15分钟执行 3,15 8-11 * * 1 myCommand 4. 设置定时任务在settings中添加CRONJOBS，设置定时任务

Cron python script not executing

阅读更多关于 Cron python script not executing

问题 I have read a few posts on this but I could not find help in them. I have a python script that sends mail using smtplib. It works when invoked from the command line. I have #!/usr/bin/python as the first row and can run it both using /home/pi/ipsender.py and python /home/pi/ipsender.py . My crontab is */1 * * * * /home/pi/ipsender.py but I have also tried */1 * * * * python /home/pi/ipsender.py and */1 * * * * /usr/bin/python /home/pi/ipsender.py . Doing which python I get /usr/bin/pyhton and

Is `/1 * * ` and ` * * * *` equivalent in CRON?

阅读更多关于 Is `*/1 * * * *` and `* * * * *` equivalent in CRON?

问题 As I have recently seen something like */1 * * * * ./script.py I would like to know if it means the same as * * * * * ./script.py 回答1: Yes, it does. */X means: every X minutes * means: every minute So all together */1 means exactly the same as * . From man cron: Step values can be used in conjunction with ranges. Following a range with /number specifies skips of the number's value through the range . For example, 0-23/2'' can be used in the hours field to specify command execution every other

Cron Job to run on a range of days only on a particular day of week

阅读更多关于 Cron Job to run on a range of days only on a particular day of week

问题 0 0 2-31 * sun /home/ubuntu/x.h 0 0 2-31 * mon-sat /home/ubuntu/y.h This ends up running both of them. Am I doing something wrong here? 回答1: This is the crontab format: * * * * * | | | | | | | | | +---- Day of the Week (range: 0-6, 0 standing for Sunday) | | | +------ Month of the Year (range: 1-12) | | +-------- Day of the Month (range: 1-31) | +---------- Hour (range: 0-23) +------------ Minute (range: 0-59) Ubuntu man 5 crontab says: field allowed values ----- -------------- minute 0-59