i have one shell script which i want to run every hour.
My crontab looks like shown below
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
HOME=/
02 * * * * root run-parts /Weather/run.sh
but its not running every hour.
2 days before i had written same code in /etc/cron.d/0hourly file that time it was working perfectly but suddenly now it stopped working, then i tried writting it in crontab but its not running.
i checked the crontab running status it gave me following
crond (pid 4487) is running...
My log file at /var/log/root is showing like
Apr 9 06:02:01 sandbox crond[4487]: (*system*) RELOAD (/etc/crontab)
Apr 9 06:02:01 sandbox crond[4487]: (crontab) ORPHAN (no passwd entry)
Am i doing something wrong??
Is there any step i missed?
in which file should i write code either in /etc/crontab or /etc/cron.d/0hourly
Please help me resolve this.
Thanks in Advance
The leading 0, '02' is not necessary. I don't now if that will cause an error. There also seems to be a single tick at the end of your line. I like to explicitly set the shell with:
2 * * * * /bin/bash -l -c '/full/path/to/script >> /full/path/to/log.log 2>&1'
Related
I made a cron job in (Ubuntu 14 Trusty), like this way:
sudo crontab-e
then
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
* * * * * curl --silent http://www....cron_script.php > /dev/null
But sometimes, I get this error message to the crown job:
/etc/cron.hourly/curl:
/etc/cron.hourly/curl: line 5: bin: command not found
run-parts: /etc/cron.hourly/curl exited with return code 127
Can anybody tell me why? As you can see, it runs every minute, but once a hour I get that error message. Mostly on every hour at XX:54 minutes.
Thanks in advance!
Your crontab should'n contain the line:
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
Since you've put the path in the crontab hourly script it executes every hour which make you error show up
Create a script instead and put both lines in there
#!/bin/bash
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
curl --silent http://www....cron_script.php
then in crontab just run the script
* * * * * my_script.sh > /dev/null 2>&1
Crontab should only contains lines which follows the format:
m h dom mon dow command
I think it is not able to find command curl while running from crontab, so you need to do which curl it will give you location of it in your box. Then try to give exact path of that curl command eg--> /usr/bin/curl into cron entry and let me know if this helps you. Also your path details should be added to the user's DOT/BASH profile by which you are running the crontab, then it could work without giving complete path of curl command too.
I have the following bash script:
clean-tmp.sh
#!/bin/bash
tmpreaper 1h /tmp --test > ./tmpreaper.log
When I run it in the terminal using ./clean-tmp.sh, it writes to the file ./tmpreaper.log.
I added the script to the list of cron jobs using crontab -e:
*/5 * * * * cd /home/cron-jobs && ./clean-tmp.sh
I then checked cron's logs and this entry is in there every 5 minutes:
Feb 19 00:45:01 ip-172-31-23-184 CRON[1475]: (ubuntu) CMD (cd /home/cron-jobs && ./clean-tmp.sh)
But it's no longer writing to ./tmpreaper.log.
What on earth am I doing wrong?
Just specify an absolute path for your file, like tmpreaper 1h /tmp --test > /var/log/tmpreaper.log
#Kacy: Little difficult to say without cron logs, you could have a look to cron logs(/var/log/cron etc).
0,5,10,15,20,25,30,35,40,45,50,55 * * * * cd /home/cron-jobs; ./clean-tmp.sh
May be some systems wouldn't allow time period as the way you tried, try once in above way and let us know then.
Here's the content of my crontab file:
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO="example#example.com"
*/5 * * * * sh /robot/1/master.sh >/dev/null 2>&1
*/5 * * * * sh /robot/2/master.sh >/dev/null 2>&1
*/5 * * * * sh /robot/3/master.sh
*/5 * * * * sh /robot/4/master.sh >/dev/null 2>&1
*/5 * * * * sh /robot/5/master.sh >/dev/null 2>&1
This is the error that keeps showing in /var/log/cron when it tries to run:
crond[669]: (sh) ERROR (getpwnam() failed)
If I run any of these files manually, they work without any issues.
What's wrong with the crontab file?
It surprises me that nobody has the correct answer to this. Today i faced exactly the same problem and google didn't help.
After 2 hours i found that when placing a file in /etc/cron.d the schedule line has to contain an extra option.....
I allways use this for my crontab -e
# Minute Hour Day of Month Month Day of Week Command
# (0-59) (0-23) (1-31) (1-12 or Jan-Dec) (0-6 or Sun-Sat) /my/fancy/script.sh
So it contains 6 items.
When placing this in a file inside /etc/cron.d the cron needs an extra option, being the user to run your fancy/script.
# Minute Hour Day of Month Month Day of Week Who Command
# (0-59) (0-23) (1-31) (1-12 or Jan-Dec) (0-6 or Sun-Sat) root /my/fancy/script.sh
This is documented in man crontab(5). For example https://linux.die.net/man/5/crontab . It says:
Jobs in /etc/cron.d/
The jobs in cron.d are system jobs, which are used usually for more than one user. That's the reason why is name of the user needed. MAILTO on the first line is optional.
The sixth position is reserved for username running the job. You specified a user called sh which is most probably not present on the machine.
simple answer
on your crontab you need to specify the USER to run the command
example to run as ROOT is:-
0,10,20,30,40,50 * * * * root /path_to_script/script_name
or to run as user FRED
0,10,20,30,40,50 * * * * fred /path_to_script/script_name
default with no USER specified is to run as user CRON and that user would not have permissions to execute the script
We can create cron jobs for system as well for individuals. The crontab in /etc/crontab specifically used for system cronjobs. So you need to specify the cronjob command executed by whom. In the question the username not specified. Hence the ERROR (getpwnam() failed) occurs. You can create user specific cronjobs in /var/spool/cron/username
NOTE:: Cron jobs are very useful but disastrous on failures!
Nothing is wrong with the crontab file (so long as by "my" crontab, you mean that it's a user crontab rather than a system crontab; otherwise, see other answer).
On the other hand, something is wrong with your system's directory service -- as configured, in Linux, with nsswitch.conf. Perhaps you're using a Kerberos-authenticated LDAP store, and your cron daemon doesn't have a Kerberos token to connect to it (or is sandboxed, as with SELinux, not to have network access); perhaps it's a file store that isn't readable by the user whose crontab is being run; perhaps some other odd and interesting thing is going on.
getpwnam() is a C library call that performs a lookup for the name of the currently-logged-in user. If your shell were bash, it would fall back to a name of I have no name! -- so this error means your sh implementation is something different. (If you want to run your scripts with bash, use bash, not sh).
*/10 * * * * /bin/sh /dataScience/dat/JOB/forker.sh
Above is the cron job which does not execute. I have checked separately both the functioning of cron job and shell script which works fine. Even the below command works well.
/bin/sh /dataScience/dat/JOB/forker.sh
I have also checked the permissions of forker.sh which shows
-rwxr-xr-x 1 mango wheel 442 Nov 20 12:53 forker.sh
Am i missing something which restricts the cron job from triggering the script?
Generally the syntax for the job goes like:
minute hour dom month dow user cmd
In your case, the job might be for multiple user, it seems
*/10 * * * * /bin/sh /dataScience/dat/JOB/forker.sh
Which implies it should be run at the interval of 10 mins all the time. Which is not problematic.
Can you tell us if the following is giving you the output at all?
*/10 * * * * (echo "Printing."; echo "Logging." > /dataScience/dat/JOB/abc.txt | mail -s "Mailing" your_email)
Note: I wanted to comment this, since this is not exactly the answer but debugging, but I have reputation lesser than 50, hence couldn't comment.
I'm trying to setup a crontab I have this in my current job in the current user I'm logged into
* * * * * /CS/day/get_info.sh
get_info.sh is supposed to output a text file every minute and I suspected that it would output a file in the same directory as the script is located but it doesn't.
I've also checked the syslogs to see if I could figure this out.
(user) CMD (/CS/day/get_info.sh)
(user) MAIL (mailed 46 bytes of output but got status 0x0001#012)
Can someone explain to me why this is happening?
Thanks
man cron tells you:
When executing commands, any output is mailed to the owner of the
crontab (or to the user named in the MAILTO environment variable in the
crontab, if such exists). The children copies of cron running these
processes have their name coerced to uppercase, as will be seen in the
syslog and ps output.
So you have to
cd into the appropriate directory yourself (cron will use $HOME)
redirect ANY output to a file of your choice
You can do both things in the crontab. But I recommend to do it in the first lines of the script itself:
#!/bin/bash
cd WHEREEVER_YOU_WANT
exec > YOUR_LOG_FILE 2&>1
The script is run in the home directory of the user and the file should be there as well. If you want it in the same directory as the script, either do a cd in your script or modify your crontab entry:
*/1 19-20 * * * cd /CS/day; /CS/day/get_info.sh
Another common problem with crontab entries is the environment. If the script works correctly in your terminal, try debugging it, when it is run from cron:
40 11 * * * bash -x /CS/day/get_info.sh >/tmp/get_info.sh.log 2>&1
Run it once only with current time, because otherwise you will overwrite your log file every minute.
On my case, I just had to install and configure an smtp client.