Why crontab 1 0 * * * run at 12h (12/24) - cron

I have a crontab:
1 0 * * * /opt/scripts/pg_backup mydb
I expected it run at 00:01
But it always run at 12h (12/24), not 0h every day.
How can I fix it?

Related

Cronjobs not sending any e-mails

I have some cronjobs written on several servers using CentOS7 in combination with Plesk 18.
When I check my cron log I see that the cronjobs are started.
Even when I manually start the scripts I want to use they work, but for some reason when the crontab does it, nothing is happening.
For instance some of the cronjobs I have are:
MAILTO=support#shoptrader.nl
0 0 * * * sh /var/www/vhosts/upgrade14.shoptrader.com/httpdocs/remove_files.sh
0 6 * * * sh /var/www/vhosts/upgrade14.shoptrader.com/httpdocs/security_htaccess/security_htaccess.sh
15 7 * * * sh /var/www/vhosts/upgrade14.shoptrader.com/httpdocs/backup_personal_files.sh
30 9 * * * sh /var/www/vhosts/upgrade14.shoptrader.com/httpdocs/find_hacks/find_hacks.sh
*/5 * * * * sh /var/www/vhosts/upgrade14.shoptrader.com/httpdocs/find_sql_injection/find_sql_injection.sh
15 0 * * * sh /var/www/vhosts/upgrade14.shoptrader.com/httpdocs/backup_templates_data/backup_templates_data.sh
If I check my log I see something like: Jan 14 09:30:01 web14 CROND[4402]: (root) CMD (sh /var/www/vhosts/upgrade14.shoptrader.com/httpdocs/find_sql_injection/find_sql_injection.sh)
I've notified myself with e-mails and get this response
/var/www/vhosts/upgrade14.shoptrader.com/httpdocs/find_sql_injection/find_sql_injection.sh: line 12: php: command not found.
Which doesn't make sense, because PHP is working on the server.

Linux Cronjob does not execute

I created a cronjob with the command crontab -e:
* * * * * (filename).sh
This file test.sh should be executed every minute. But it doesn't work.
I know that it is not the script because i did run bash (name of the file) it works so the crontad is the issue.
every minute:
* * * * * sciptname.sh
every 24hours (every midnight):
0 0 * * * sciptname.sh

run multiple task in crontab in the same time without delay

I have to run task which take time 3 or 5 minut
How to run multiple task in crontab -in same time ?
crontab -e
0 13 * * * /etc/rip_first_radio.sh
0 13 * * * /etc/rip_second_radio.sh
0 13 * * * /etc/rip_third_radio.sh
0 13 * * * /etc/rip_fourth_radio.sh
your crontab config is correct. But you can add add all into one script and run also.
vi main.sh
./etc/rip_first_radio.sh &
./etc/rip_second_radio.sh &
./etc/rip_third_radio.sh &
./etc/rip_fourth_radio.sh &
and add main.sh to cron.
0 13 * * * ./main.sh

My VPS restarting every hour

Hello my server is restarting every hour, where the problem ?
Centos 6.6 with WHM/Cpanel
This my cronjob
root#server [/etc/cron.d]# crontab -l
0 6 * * * /usr/local/cpanel/scripts/exim_tidydb > /dev/null 2>&1
30 5 * * * /usr/local/cpanel/scripts/optimize_eximstats > /dev/null 2>&1
2,58 * * * * /usr/local/bandmin/bandmin
0 0 * * * /usr/local/bandmin/ipaddrmap
18 23 * * * /usr/local/cpanel/scripts/upcp --cron
0 1 * * * /usr/local/cpanel/scripts/cpbackup
0 2 * * * /usr/local/cpanel/bin/backup
35 * * * * /usr/bin/test -x /usr/local/cpanel/bin/tail-check && /usr/local/cpanel/bin/tail-check
45 */4 * * * /usr/bin/test -x /usr/local/cpanel/scripts/update_mailman_cache && /usr/local/cpanel/scripts/update_mailman_cache
30 */4 * * * /usr/bin/test -x /usr/local/cpanel/scripts/update_db_cache && /usr/local/cpanel/scripts/update_db_cache
30 */2 * * * /usr/local/cpanel/bin/mysqluserstore >/dev/null 2>&1
15 */2 * * * /usr/local/cpanel/bin/dbindex >/dev/null 2>&1
15 */6 * * * /usr/local/cpanel/scripts/autorepair recoverymgmt >/dev/null 2>&1
*/5 * * * * /usr/local/cpanel/bin/dcpumon >/dev/null 2>&1
46 0 * * * /usr/local/cpanel/whostmgr/docroot/cgi/cpaddons_report.pl --notify
7,22,37,52 * * * * /usr/local/cpanel/whostmgr/bin/dnsqueue > /dev/null 2>&1
42 4 * * * /usr/local/cpanel/3rdparty/bin/freshclam --quiet --no-warnings
Just looking at your cron jobs I can see that this job runs every hour, so that is a good place to start looking:
35 * * * * /usr/bin/test -x /usr/local/cpanel/bin/tail-check && /usr/local/cpanel/bin/tail-check
Also, this job runs twice an hour, but they happen so close together that it might appear to occur only once. Check it out next:
2,58 * * * * /usr/local/bandmin/bandmin
If you can, I would just comment out these 2 jobs for a few hours and see if that solves your problem. If it does then you know one of these is causing the reboot.

Cronjob every x hours between 23-16 not working

Partly using stackoverflow search I figured out how to run my cronjob every 3 hours but not between 23h-16h. That means a pause between 16h today untill 23h today. So the cronjob should start running every 3 hours at 23h and stop at 16h, then start again at 23h.
This is the result:
0 23-16/3 * * * /usr/local/bin/flexget -c /media/usb/Downloads/flexget/config.yml --cron
Now my question: Why is this not working? It does not run at all :(
I also tried:
* 23-16/3 * * * /usr/local/bin/flexget -c /media/usb/Downloads/flexget/config.yml --cron
(not sure what the difference is with 0 or with * for the minutes, rounded hours or not?)
This DOES work:
0 */3 * * * /usr/local/bin/flexget -c /media/usb/Downloads/flexget/config.yml --cron
But then it just runs every 3 hours every day, without pause between 16-23.
You can always list the hours explicitly.
0 2,5,8,11,14,23 * * * /usr/local/bin/flexget -c /media/usb/Downloads/flexget/config.yml --cron
Note this is not the same as with replacing 0 minutes with *, like:
* 2,5,8,11,14,23 * * * /usr/local/bin/flexget -c /media/usb/Downloads/flexget/config.yml --cron
The latter starts on every minute on the hours specified, i.e. 2:00, 2:01, 2:02, ..., 2:59, 5:00, 5:01, ... 5:59, ...

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