This occurs on an i386 box running Unix System V/386 Release 4.2 Ver 1.1.2.
I have an 'at' scheduling anomaly whose behavior I am trying to understand. On one particular system, when an 'at' job is submitted, the time the job is actually scheduled to run is exactly 2 hours later than what the... (10 Replies)
Hi All,
i am trying to automate a process and have to create a unix script like wise. I have a scenario in which i need to automate a file movement. Below are the steps i need to automate.
1. Check whether a file (Not Fixed name-Pattern search of file say 'E*.dat') is present in a... (2 Replies)
Hello,
I have problem in executing a shell script. When the shell script is executed at the shell prompt the script works successfully but when the same script is run as a cron job it fails to execute the files called within the shell script.
I have scheduled the job in my crontab file as
... (6 Replies)
I am trying to schedule FTP script through autosys.The scripts works perfectly fine in unix environment.All the run time parameters are evaluated in the profile.Both are unix servers.
But the strange thing is that the script is not getting executed through autosys and it returns success and... (1 Reply)
Hello all,
I am admittedly a newbie and have created a plist designed to fire off a shell script everyday at 3:00pm. It is located in /Library/LaunchDaemons/. I use it to mirror a hard local drive with a remote one. It worked one time but not again after that. I never restart the machine... (0 Replies)
Hi,
Though this is a unix forum mainly, am posting this oracle query here hoping to get a resolution.
I have set up two scheduled jobs in oracle 11g for executiong a procedure in specific time intervals. One as Hourly and other as minutely.
But the scheduled jobs are not running as per... (2 Replies)
I have scheduled couple of shell scripts to run using 'at' command.
The o/p of at -l is:
$ at -l
1320904800.a Thu Nov 10 01:00:00 2011
1320894000.a Wed Nov 9 22:00:00 2011
1320876000.a Wed Nov 9 17:00:00 2011
$ uname -a
SunOS dc2prcrptetl2 5.9 Generic_122300-54 sun4u sparc... (2 Replies)
Hi,
I want my unix script to run as a scheduled job such that the script is invoked once every 15 minutes. Is there any way to achieve this other than running the script as a cron job? (2 Replies)
i have a job scheduled in crontab. The problem is, it is not running automatically as per the time scheduled. But runs when executed manually. What would be the problem? Help me with this please. (6 Replies)
Team,
Hope you all are doing fine
I have one admin server which is being used dedicately to run cron jobs on hourly basis, fetching the details from Database which is in a different server.These cronjob are run on every hourly/5 minutes basis depending as per end user requirement.The script... (12 Replies)
Discussion started by: whizkidash
12 Replies
LEARN ABOUT SUNOS
cron
cron(1M) System Administration Commands cron(1M)NAME
cron - clock daemon
SYNOPSIS
/usr/sbin/cron
DESCRIPTION
cron starts a process that executes commands at specified dates and times.
You can specify regularly scheduled commands to cron according to instructions found in crontab files in the directory
/var/spool/cron/crontabs. Users can submit their own crontab file using the crontab(1) command. Commands which are to be executed only once
can be submitted using the at(1) command.
cron only examines crontab or at command files during its own process initialization phase and when the crontab or at command is run. This
reduces the overhead of checking for new or changed files at regularly scheduled intervals.
As cron never exits, it should be executed only once. This is done routinely by way of the svc:/system/cron:default service. The file
/etc/cron.d/FIFO file is used as a lock file to prevent the execution of more than one instance of cron.
cron captures the output of the job's stdout and stderr streams, and, if it is not empty, mails the output to the user. If the job does not
produce output, no mail is sent to the user. An exception is if the job is an at(1) job and the -m option was specified when the job was
submitted.
cron and at jobs are not executed if your account is locked. Jobs and processses execute. The shadow(4) file defines which accounts are not
locked and will have their jobs and processes executed.
Setting cron Jobs Across Timezones
The timezone of the cron daemon sets the system-wide timezone for cron entries. This, in turn, is by set by default system-wide using
/etc/default/init.
If some form of daylight savings or summer/winter time is in effect, then jobs scheduled during the switchover period could be executed
once, twice, or not at all.
Setting cron Defaults
To keep a log of all actions taken by cron, you must specify CRONLOG=YES in the /etc/default/cron file. If you specify CRONLOG=NO, no log-
ging is done. Keeping the log is a user configurable option since cron usually creates huge log files.
You can specify the PATH for user cron jobs by using PATH= in /etc/default/cron. You can set the PATH for root cron jobs using SUPATH= in
/etc/default/cron. Carefully consider the security implications of setting PATH and SUPATH.
Example /etc/default/cron file:
CRONLOG=YES
PATH=/usr/bin:/usr/ucb:
This example enables logging and sets the default PATH used by non-root jobs to /usr/bin:/usr/ucb:. Root jobs continue to use
/usr/sbin:/usr/bin.
The cron log file is periodically rotated by logadm(1M).
FILES
/etc/cron.d Main cron directory
/etc/cron.d/FIFO Lock file
/etc/default/cron cron default settings file
/var/cron/log cron history information
/var/spool/cron Spool area
/etc/cron.d/queuedefs Queue description file for at, batch, and cron
/etc/logadm.conf Configuration file for logadm
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO svcs(1), at(1), crontab(1), sh(1), logadm(1M), svcadm(1M), queuedefs(4), shadow(4), attributes(5), smf(5)NOTES
The cron service is managed by the service management facility, smf(5), under the service identifier:
svc:/system/cron:default
Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The ser-
vice's status can be queried using the svcs(1) command.
DIAGNOSTICS
A history of all actions taken by cron is stored in /var/cron/log and possibly in /var/cron/olog.
SunOS 5.10 5 Aug 2004 cron(1M)