how can I execute this command with crontab
0 * * * * service ogp_agent restart
It doesn't work for me, what should I do?
Related
I'm trying to run a cronjob to start and stop a server under a non-sudo user. I've tried asking others and doing what I saw from looking on google before asking here, but I'm still stuck.
Here's what's in my crontab for the server user:
* * * * * /home/server/startup/stop.sh
* * * * * /home/server/startup/start.sh
Here is what is in my stop.sh script:
#! /bin/sh
screen -r server -X quit
Everything runs normally if I run it using sh, and I only encounter a problem when using cron.
From what I see there could be 2 possible problems:
If the lines you are running in crontab are (and only those):
home/server/startup/stop.sh
home/server/startup/start.sh
then you are missing the time part of the line. If you want to run your program only once on boot you can run:
#reboot home/server/startup/start.sh
You are not giving the full path to your program (possibly you are just missing a / in the begging). Try running
* * * * * /home/server/startup/start.sh
or
#reboot /home/server/startup/start.sh
If these don't work I recommend you try the following to troubleshoot the issue:
Run the command using sh in the cron:
* * * * * /bin/sh /home/server/startup/start.sh
Try redirecting the stdout and stderr of your command to a file and see if any errors occur
Tried this, but it doesn't work:
SHELL=/bin/bash
PATH=/usr/lib/node_modules/pm2/bin
* 0,12 * * * pm2 restart all
What am I doing wrong?
Edit cron with crontab -e and add the following:
0 */12 * * * /usr/bin/node /usr/bin/pm2 restart all
For the schedule, use 0 */12 * * * for every 12 hours, or 0 0,12 * * * for 0:00 and 12:00 specifically. (Your schedule, * 0,12 * * *, would trigger every minute of hour 0 and hour 12, 0:00, 0:01, 0:02...)
For the command, as fedorqui mentioned, use the path to node followed by the path to pm2 and the pm2 options. Use which node and which pm2 to get the path to node and pm2.
Among multiple restart strategies, PM2 can restart application based on a cron format via the option --cron-restart
Restart app every midnight:
pm2 start app.js --cron-restart="0 0 * * *"
For more information check out the doc:
https://pm2.keymetrics.io/docs/usage/restart-strategies/#restart-at-cron-time
Don't restart, reload (zero down-time)
Reload myApp every day at 4:30 AM
30 4 * * * /usr/local/bin/node /usr/local/bin/pm2 reload <myAppId> > /dev/null 2>&1
To check the full path of node and pm2 do which node and which pm2. The portion > /dev/null 2>&1 ignores the stdout and stderr.
I am new to Linux and Ubuntu and I seldom have to use it. I am trying to make this PHP script to run every minute using cron, but firstly I wanted to make some tests.
I created an empty file at /var/www/html/ called test. I ran on terminal:
sudo crontab -e
And added this line:
0 * * * * rm /var/www/html/test
Then saved it and exited. It said "Installing new Crontab"
Nothing happened. Then I created a file bfile.sh that contained:
#!/bin/sh
rm /var/www/html/test
and added the following to crontab:
0 * * * * bash /var/www/html/bfile.sh
Still nothing happened.
What do I have to do to see anything happening from crontab? By the way I checked and the service is running
0 * * * * basically says "run this at 0th minute of every hour."
If you need cron to run your command every minute do * * * * *.
0 * * * * runs once every 1 hour. If you want to run every minute it should be */1 * * * *
You can also check the /var/log/cron file for any errors
I've been trying to run a crontab command but it isn't running for some reason. The command is supposed to send push notifications.
My sudo crontab -e looks like this:
0 0 * * 0 /home/[user]/resetWeeklyLeaderboard
* * * * * /home/[user]/pushDelivery
I have a file called pushDelivery at the location above which contains the following:
/usr/bin/flock -n /home/[user]/PushChatServer/push/lockfile usr/bin/php /home/[user]/PushChatServer/push/push.php development
I have also made pushDelivery executable by doing chmod +x pushDelivery. This code works perfectly for my resetWeeklyLeaderboard file but won't call the pushDelivery file.
It works if I run
/home/[user]/pushDelivery
It works if I run
/usr/bin/flock -n /home/[user]/PushChatServer/push/lockfile usr/bin/php /home/[user]/PushChatServer/push/push.php development
However if in crontab I do
* * * * * /home/[user]/pushDelivery
or
* * * * * /usr/bin/flock -n /home/[user]/PushChatServer/push/lockfile usr/bin/php /home/[user]/PushChatServer/push/push.php development
it doesn't work. Please help me. Thank you!
UPDATE:
It still doesn't work but I've tried more stuff. I tried reversing the order in the crontab
* * * * * /home/[user]/pushDelivery
0 0 * * 0 /home/[user]/resetWeeklyLeaderboard
it doesn't work. I also tried making my resetWeeklyLeaderboard code run minutely
* * * * * /home/[user]/pushDelivery
* * * * * /home/[user]/resetWeeklyLeaderboard
and that works for my resetWeeklyLeaderboard code but not for my pushDelivery code. This implies to me that it is something in my pushDelivery code that is causing the issue. However I run /home/[user]/pushDelivery from command line and it works. What could be causing this problem?
i dont know why is is not running but same thing happens to me before at that time insted of doing
* * * * * /home/[user]/pushDelivery
try this
*/1 * * * * /home/[user]/pushDelivery
it worked for me in this way...(both the task run in every minute)
I fixed the issue. In my pushDelivery file I was supposed to write:
/usr/bin/flock -n /home/[user]/PushChatServer/push/lockfile /usr/bin/php /home/[user]/PushChatServer/push/push.php development
whereas I'd written:
/usr/bin/flock -n /home/[user]/PushChatServer/push/lockfile usr/bin/php /home/[user]/PushChatServer/push/push.php development
The "/" before the "usr/bin/php" makes all the difference. Somehow just that slash will allow it to work outside of crontab but will fail it when run inside crontab. I don't understand why but this is the correct solution.
Is there a way to enable and disable Crontab tasks using Bash/Shell?
So when the user starts Server 1, it will enable the Server 1 Crontab line and so on.
And when the user stops Server 1, the Server 1 Crontab line get disabled (#).
Is this possible and how?
Thanks in advance
*/1 * * * * Server 1 check
*/1 * * * * Server 2 check
*/1 * * * * Server 3 check
SERVERNUM=$1
To enable:
crontab -l | sed "/^#.*Server $SERVERNUM check/s/^#//" | crontab -
To disable:
crontab -l | sed "/^[^#].*Server $SERVERNUM check/s/^/#/" | crontab -
Transcript:
barmar#dev$ crontab -l
*/1 * * * * Server 1 check
*/1 * * * * Server 2 check
*/1 * * * * Server 3 check
barmar#dev$ crontab -l | sed '/^[^#].*Server 1 check/s/^/#/' | crontab -
barmar#dev$ crontab -l
#*/1 * * * * Server 1 check
*/1 * * * * Server 2 check
*/1 * * * * Server 3 check
barmar#dev$ crontab -l | sed '/^#.*Server 1 check/s/^#//' | crontab -
barmar#dev$ crontab -l
*/1 * * * * Server 1 check
*/1 * * * * Server 2 check
*/1 * * * * Server 3 check
I suggest you add your cron jobs to /etc/cron.d for every server one script. Then let the cron script scan for some marker file if the cron job should be executed.
As a quick and dirty fix, you can enable or disable the execute permission of the appropriate cron script.
E.g. if you like to prevent locate from automatically updating its database (which can be I/O consuming):
cd /etc/cron.daily
sudo chmod a-x locate
This may be against the cron framework, but it is quickly applied and it works in case of immediate needs.
this is a variant, I use a cronjob that loads it self every night. I just edit a file and it gets reloaded at 10pm everynight. You could make the reload happen more often. I keep a directory of files for each of nodes. The trick is make sure that nobody comments out the reload line.
0 22 * * * crontab /home/ME/cron_files/NODE