Cron job completetion

[Ramkumarselvam]

CRON JOB COMPLETETION
1) How to know whether cronjob has been completed as scheduled.
2) Cronjob often tries to send message to my mail id but i would like to find the output in the terminal window ,similar kind of "WALL".
3) even i tried to output the file to tmp file but i didn't find the file is executing.

Here is my code
#!/bin/bash
MAILTO="xxx"
01 **** /home/demo1.sh /tmp/cronjob.log

I don't want the o/p to be sent to my email id rather i would like to show up the output either in a X window as popup or in the terminal window.

Your valuable assistance and feedback is highly appreciated.

[Ramkumarselvam]

Please give me with step by step instruction to create a cronjob and find the o/p of it. I am new to linux

[kdg1955]

Start cron with the option -s in your daemon (/etc/init.d/crond or /lib/systemd/system/crond.service) and restart the cron daemon.
This will direct all outputs to the syslog.

If you want it for one or more jobs (but not all) there is a workaround:

start your scheduled job in a script and redirect all outputs (also the errors)
Example:

#!/bin/sh
myCronJob > /tmp/myCronJob.log 2> /tmp/myCronJob.err

[atreyu]

CRON JOB COMPLETETION
1) How to know whether cronjob has been completed as scheduled.
2) Cronjob often tries to send message to my mail id but i would like to find the output in the terminal window ,similar kind of "WALL".
3) even i tried to output the file to tmp file but i didn't find the file is executing.

Here is my code
#!/bin/bash
MAILTO="xxx"
01 **** /home/demo1.sh /tmp/cronjob.log

I don't want the o/p to be sent to my email id rather i would like to show up the output either in a X window as popup or in the terminal window.

Your valuable assistance and feedback is highly appreciated.

Where did you save that code you've posted? If it is a cronjob, you do not need the #!/bin/bash at the top.

To create a cronjob, run:

crontab -e

Now insert the appropriate stuff for the cronjob, e.g.:

MAILTO="xxx"
1 * * * * /home/demo1.sh /tmp/cronjob.log 2>&1

Then save and quit the file. Note that /home/demo1.sh must be executable.

To list your installed cronjobs:

crontab -l

If the cron daemon is already running, you don't need to restart it - the new job will get picked up.

Look in the cron log (usually /var/log/cron) for errors, etc. Your log file (/tmp/cronjob.log) should contain the output (STDERR/STDOUT) of your script.

[Ramkumarselvam]

Hi atreya and Kdg, Thank you so much for your valuable making me understanding this topic, I got the output as u said, but when I changed the output in demo1.sh file and look under the folder /tmp/cronjob.log i am finding the old output as i find before could you please tell me

[kdg1955]

Do you have the logs in /var/log/cron?
You're sure the sheduled job has run?
Do you have output(s) when you run demo1.sh directly from a shell process?
Can you post demo1.sh?

[Ramkumarselvam]

here is the demo1.sh file
Clear
echo "this is testing"
echo "See the todays date"
date -u

When i compile the demo file i am able to get the output but when i put it in cron job i am getting only the first echo window as o/p "This is testing" in /tmp/cronjob

[kdg1955]

I can simulate your error.
Here's my code for demo1.sh

$> cat demo1.sh
#!/bin/bash
clear
echo "this is testing"
echo "See the todays date"
date -u

You should have a simular line in /etc/crontab (just an example, it will run every 3 minutes):

0-59/3 * * * * root run-parts /etc/cron.test4Forum

.
If your troubles persists, can you also post the configuration files:

• /etc/crontab
• /etc/init.d. or /lib/systemd/system/crond.service

?

Don't forget to restart the cron-daemon each time you change one of the these files.

$> service crond restart

[kdg1955]

Do you have a line in /etc/rsyslog.conf like this:

cron.* /var/log/cron?

This line means that all cron logs are written in the file /var/log/cron.
.
BTW: if you change this file, you should restart the rsyslog-daemon:

$> service rsyslog restart