I have a crontab that is working fine and I added another line to delete files within a specific folder every Thursday at 11:30pm on Wednesday. Today is Friday but it's not working. It didn't delete the files in the /downloads folder.
55 23 * * 4-6 /usr/html/sched/restart.sh > /usr/html/sched/sched.log
30 23 * * 4 rm -rf /usr/html/sched/downloads/*
What am I missing? Why is this not working?
This is the server date:
Fri Oct 1 11:07:33 UTC 2021
This line in cron
30 23 * * 4 rm -rf /usr/html/sched/downloads/*
run at 23:30 every Thursday. To make it run on Friday you need to change it as this:
30 23 * * 4,5 rm -rf /usr/html/sched/downloads/*
to have run it every day it should be:
30 23 * * * rm -rf /usr/html/sched/downloads/*
Related
I have a crontab settings as follows:
sudo crontab -l -u bheng
Contents:
#field allowed values
# ----- --------------
# minute 0-59
# hour 0-23
# day of month 1-31
# month 1-12 (or names, see below)
# day of week 0-7 (0 or 7 is Sun, or use names)
#
# m h dom mon dow command
MAILTO="bheng#outlook.com"
#Daily
01 22 * * * php /home/mysite.com/artisan products:exportdiff --interval="yesterday"
16 22 * * * php /home/mysite.com/artisan images:exportdiff --interval="yesterday"
31 22 * * * php /home/mysite.com/artisan publications:exportdiff --interval="yesterday"
#Weekly
1 23 * * 7 php /home/mysite.com/artisan publications:exportdiff --interval="last sunday"
16 23 * * 7 php /home/mysite.com/artisan images:exportdiff --interval="last sunday"
31 23 * * 7 php /home/mysite.com/artisan products:exportdiff --interval="last sunday"
As you can see, it suppose to be kicking at 10 and 11 PM at night.
But instead, I got 3 emails at 5 PM yesterday at 5:01 PM, 5:16 PM, 5:31 PM.
I thought it was the time wrong the in system or VM so I checked it I saw UTC time.
Then, I update it by running sudo dpkg-reconfigure tzdata and set it to US Eastern time.
Now, when I ran date command I got Ex.Thu Dec 15 07:56:27 EST 2016 correctly as US EST time.
Is there some service that I need to restart?
Or is this something other crontab settings that might have overwrite my current settings ?
I believe you have to restart cron after making time / time zone related changes.
Depending on your version of cron, you might be able to restart it with sudo service cron restart.
I got this crontab code to run a script on crontab every 15 minutes from 9 to 18 all days except weekends. However I would like to start fro 9:30 instead of 9. Is it there a way to do it?
*/15 9-18 * * 1-5
Using 30/15 in the minute area should work just fine:
30/15 9-18 * * 1-5
This will instruct crontab to run your script: “At every 15th minute from 30 through 59 past every hour from 9 through 18 on every day-of-week from Monday through Friday.”
I finally did this, and it works
30 9 * * 1-5
45 9 * * 1-5
*/15 10-18 * * 1-5
However, it needs three crontab entries.
i have a problem with crontab not running a script of mine at all. i have simplified the script down to a single line but it still won't run:
$ cat /etc/crontab
# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file
# and files in /etc/cron.d. These files also have username fields,
# that none of the other crontabs do.
SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
# m h dom mon dow user command
17 * * * * root cd / && run-parts --report /etc/cron.hourly
25 6 * * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
47 6 * * 7 root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
52 6 1 * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
*/1 * * * * root /usr/share/test/script.sh
# don't forget the newline at the end (https://askubuntu.com/a/23337/12057):
$ cat /usr/share/test/script.sh
#!/bin/bash
echo "got here" > /tmp/test.txt
$ ls -l /usr/share/test/script.sh
-rwxr-xr-x 1 root root 951 May 8 08:59 /usr/share/test/script.sh
$ uname -a
Linux mypcname 3.2.0-4-amd64 #1 SMP Debian 3.2.51-1 x86_64 GNU/Linux
$ ps aux | grep cron
root 1111 0.0 0.0 22222 3333 ? Ss 08:27 0:00 /usr/sbin/cron
me 4444 0.0 0.0 5555 666 pts/0 S+ 09:06 0:00 grep --color=auto cron
as you can see the crontab should run script.sh once a minute and write to file /tmp/test.txt, however this file never appears. i have been reading through these possible reasons for cron not running, but so far none of them are applicable. i thought a fresh set of eyes might shed some light.
Every minute is
* * * * *
not
*/1 * * * *
Related question: Using crontab to execute script every minute and another every 24 hours
/var/log/syslog gave the clue to the answer:
May 8 08:50:01 mypcname /usr/sbin/cron[2222]: (*system*) WRONG FILE OWNER (/etc/crontab)
May 8 08:51:01 mypcname /usr/sbin/cron[2222]: (*system*) WRONG FILE OWNER (/etc/crontab)
$ ls -l /etc/crontab
lrwxrwxrwx 1 root root 24 Oct 12 2013 /etc/crontab -> /home/me/.crontab
$ ls -l ~/.crontab
-rw-r--r-- 1 root root 24 Oct 12 2013 /home/me/.crontab
i remember i did this when i installed the debian os since everything in my home dir is checked out from a subversion repository. i fixed up the issue like so:
$ sudo cp ~/.crontab /etc/crontab
and now it all works fine :)
What is the syntax for a cron job that runs 15 and 45 minutes after the hour? (So every 30 minutes.)
Would the syntax be something like:
15,45,30 * * * * wget -O /dev/null http://somesite.com/4_leads.php
So for example it would run at
2:15
2:45
3:15
3:45
4:15
4:45
and so on
From man 5 crontab
field allowed values
----- --------------
minute 0-59
hour 0-23
day of month 1-31
month 1-12 (or names, see below)
day of week 0-7 (0 or 7 is Sun, or use names)
Or, in other words
# m h dom mon dow user command
15,45 * * * * yourusername wget -O /dev/null http://somesite.com/4_leads.php
Skip the username field if you place the entry in a user specific crontab, via crontab -e, crontab -e -u yourusername, or similar.
This question may be better suited to serverfault.
At the moment my script runs every day as follows
0 3 * * * wget --timeout=0 http://...
Is there some syntax whereby I can exclude the first day of the month i.e. Jan 1, Feb 1, Mar 1... At the moment I shut down manually each month
You can use
0 3 2-31 * * wget --timeout=0 http://...