LinuxQuestions.org - [SOLVED] Cron job not working correctly.

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Cron job not working correctly.

Hello all,

I tried to run a script every night at 12:00AM via a cron job. This is how I set it up in the crontab:

Code:

(root)-(jobs:0)-(~)

(! 1002)-> crontab -l



* 0 * *        * /root/scripts/systeminfo.sh

This is the script it self:

Code:

(root)-(jobs:0)-(~)

(! 1001)-> cat /root/scripts/systeminfo.sh 

#!/bin/bash

echo

# This script will provide system information.

echo

echo "Here is the current system information for the server"

echo

echo "Clearing systeminfo.txt file..."

echo "" > systeminfo.txt

echo "Users Logged Into System" >> systeminfo.txt

echo >> systeminfo.txt

w >> systeminfo.txt

echo >> systeminfo.txt

echo "Server Uptime Information" >> systeminfo.txt

echo >> systeminfo.txt

uptime >> systeminfo.txt

echo >> systeminfo.txt

echo "Server Disk Space Information" >> systeminfo.txt

echo >> systeminfo.txt

df -h >> systeminfo.txt

echo >> systeminfo.txt

echo "Network Information" >> systeminfo.txt

echo >> systeminfo.txt

route >> systeminfo.txt

echo >> systeminfo.txt

echo "Memory Usage Information" >> systeminfo.txt

echo >> systeminfo.txt

free -g >> systeminfo.txt

echo >> systeminfo.txt

mail -s "System Status Report" manny@aevtech.com < systeminfo.txt

echo "End of Script"

It DOES run at 12:00AM BUT it runs every minute so I get a e-mail EVERY MINUTE. I thought it was only was supposed to run once at 12:00AM and that's it? Not sure what else I am missing for it to only run once every day at night.

Thank you for any and all help!

Quote:

Originally Posted by aevtech (Post 5074672)

Hello all,

I tried to run a script every night at 12:00AM via a cron job. This is how I set it up in the crontab:

Code:

(root)-(jobs:0)-(~)

(! 1002)-> crontab -l



* 0 * *        * /root/scripts/systeminfo.sh

This is the script it self:

Code:

(root)-(jobs:0)-(~)

(! 1001)-> cat /root/scripts/systeminfo.sh 

#!/bin/bash

echo

# This script will provide system information.

echo

echo "Here is the current system information for the server"

echo

echo "Clearing systeminfo.txt file..."

echo "" > systeminfo.txt

echo "Users Logged Into System" >> systeminfo.txt

echo >> systeminfo.txt

w >> systeminfo.txt

echo >> systeminfo.txt

echo "Server Uptime Information" >> systeminfo.txt

echo >> systeminfo.txt

uptime >> systeminfo.txt

echo >> systeminfo.txt

echo "Server Disk Space Information" >> systeminfo.txt

echo >> systeminfo.txt

df -h >> systeminfo.txt

echo >> systeminfo.txt

echo "Network Information" >> systeminfo.txt

echo >> systeminfo.txt

route >> systeminfo.txt

echo >> systeminfo.txt

echo "Memory Usage Information" >> systeminfo.txt

echo >> systeminfo.txt

free -g >> systeminfo.txt

echo >> systeminfo.txt

mail -s "System Status Report" manny@aevtech.com < systeminfo.txt

echo "End of Script"

Change:

Code:

* 0 * * * /root/scripts/systeminfo.sh

with

Code:

0 0 * * * /root/scripts/systeminfo.sh

Hello,

I have made the changes and will await tonight and see but I'm sure it will work. Thank you for your time and help very much!!

No problem.
But please note that you don't have to wait until tonight to see if it works :). Change the time the script is supposed to run to a nearer time.
Just FYI, you first crontab entry was sending you an email every minute because that's what the * sign does.
If you type

Code:

* * * * * /path/to/your/script

Then your script will run every minute of every day of every month of every year.
On the other hand,

Code:

45 12 * * * /path/to/your/script

will run your script at exactly 12:45 every day.
You may want to take a look at this link for further details on using cron.
Have a great day!