10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have unix epoch time 1441678454803, Can you please help me to print this time in below format ?
DAY,HOUR,MIN,SEC
Appreciate your help!!!
Thanks,
Prince (7 Replies)
Discussion started by: prince1987
7 Replies
2. UNIX for Dummies Questions & Answers
Hi,
I am trying to run a script in cron every 5 min in SOLARIS 10
When I do5 * * * * /path to fileor*/5 * * * * /path to file
Doesn't work. Please let me know what should I put in the cron entry
Thanks (2 Replies)
Discussion started by: Rossdba
2 Replies
3. UNIX for Dummies Questions & Answers
Hi
Is there any way to disable cron adhoc ?
I want to run a script for every one minute between 04 to 00 hours
will the below serves my purpose ?
01 04-00 * * * <your script> (1 Reply)
Discussion started by: rakeshkumar
1 Replies
4. HP-UX
Hi All
I have a problem, I wonder if you can help me sort it out:
I have the following entry in the cron:
00 1,13 * * * /home/report/opn_amt_gestores_credito.ksh > opn_amt_gestores_credito.log
But the entry only runs at 01:07
I have stopped the cron deamon, and started, but it still... (39 Replies)
Discussion started by: fretagi
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5. AIX
stupid question im sure, but its frustrating
My cron jobs are off by 5 hours. My system time is right but all of my cron jobs are running approximately 5 hours late. Any idea why? (4 Replies)
Discussion started by: mshilling
4 Replies
6. UNIX for Dummies Questions & Answers
Hi,
I want to check if a file is modified or not in the last 10 mins and run a script if so. Thanks (8 Replies)
Discussion started by: krabu
8 Replies
7. Solaris
Hello All,
Anybody please help me to know ,what happens when a user having entry in both cron.allow and cron.deny files.Wheather the user will be able to access the crontab???
Thanks in advance
Vaisakh (5 Replies)
Discussion started by: ksvaisakh
5 Replies
8. Shell Programming and Scripting
Hi
I need to run a script every five minutes and it should run between 07-15 hours all days.
How i can achieve this...
i tried like this
*/5 07-15 * * * /scripts/CreateFtpData.sh
It throws an error... (1 Reply)
Discussion started by: aemunathan
1 Replies
9. UNIX for Dummies Questions & Answers
hi guys!
I have problem with cron :rolleyes:
2,4,6,8,10,12,14,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60 * * * * /usr/local/george/update.py
I try this to schedule the script to run every second min forever :cool: but it doesn't work :o
any idea?
thanks in... (4 Replies)
Discussion started by: georgeplus
4 Replies
10. Shell Programming and Scripting
I want to add these no. these are in the format of
days:hours:minutes:sec
I want result in this format only
0:00:04:59
0:00:00:12
0:00:00:28
0:00:00:03
0:01:29:35
0:00:00:19
0:01:05:21
Is any body ca help me?????
To get This..
Thanks
Nishant (1 Reply)
Discussion started by: krishna_sicsr
1 Replies
CRON(8) System Manager's Manual CRON(8)
NAME
cron - daemon to execute scheduled commands (Vixie Cron)
SYNOPSIS
cron [-f] [-l] [-L loglevel]
DESCRIPTION
cron is started automatically from /etc/init.d on entering multi-user runlevels.
OPTIONS
-f Stay in foreground mode, don't daemonize.
-l Enable LSB compliant names for /etc/cron.d files
-L loglevel
Sets the loglevel for cron. The standard logging level (1) will log the start of all the cron jobs. A higher loglevel (2) will
cause cron to log also the end of all cronjobs, which can be useful to audit the behaviour of tasks run by cron. Logging will be
disabled if the loglevel is set to zero (0).
NOTES
cron searches its spool area (/var/spool/cron/crontabs) for crontab files (which are named after accounts in /etc/passwd); crontabs found
are loaded into memory. Note that crontabs in this directory should not be accessed directly - the crontab command should be used to
access and update them.
cron also reads /etc/crontab, which is in a slightly different format (see crontab(5)). Additionally, cron reads the files in /etc/cron.d:
it treats the files in /etc/cron.d as in the same way as the /etc/crontab file (they follow the special format of that file, i.e. they
include the user field). However, they are independent of /etc/crontab: they do not, for example, inherit environment variable settings
from it. The intended purpose of this feature is to allow packages that require finer control of their scheduling than the
/etc/cron.{daily,weekly,monthly} directories to add a crontab file to /etc/cron.d. Such files should be named after the package that sup-
plies them. Files must conform to the same naming convention as used by run-parts(8): they must consist solely of upper- and lower-case
letters, digits, underscores, and hyphens. If the -l option is specified, then they must conform to the LSB namespace specification,
exactly as in the --lsbsysinit option in run-parts.
Like /etc/crontab, the files in the /etc/cron.d directory are monitored for changes. In general, the admin should not use /etc/cron.d/, but
use the standard system crontab /etc/crontab.
In contrast to the spool area, files in /etc/cron.d may be symlinks, provided that both the symlink and the file it points to are owned by
root.
cron then wakes up every minute, examining all stored crontabs, checking each command to see if it should be run in the current minute.
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.
Additionally, cron checks each minute to see if its spool directory's modtime (or the modtime on /etc/crontab) has changed, and if it has,
cron will then examine the modtime on all crontabs and reload those which have changed. Thus cron need not be restarted whenever a crontab
file is modified. Note that the crontab(1) command updates the modtime of the spool directory whenever it changes a crontab.
Special considerations exist when the clock is changed by less than 3 hours, for example at the beginning and end of daylight savings time.
If the time has moved forwards, those jobs which would have run in the time that was skipped will be run soon after the change. Con-
versely, if the time has moved backwards by less than 3 hours, those jobs that fall into the repeated time will not be re-run.
Only jobs that run at a particular time (not specified as @hourly, nor with '*' in the hour or minute specifier) are affected. Jobs which
are specified with wildcards are run based on the new time immediately.
Clock changes of more than 3 hours are considered to be corrections to the clock, and the new time is used immediately.
cron logs its action to the syslog facility 'cron', and logging may be controlled using the standard syslogd(8) facility.
ENVIRONMENT
If configured in /etc/default/cron in Debian systems, the cron daemon localisation settings environment can be managed through the use of
/etc/environment or through the use of /etc/default/locale with values from the latter overriding values from the former. These files are
read and they will be used to setup the LANG, LC_ALL, and LC_CTYPE environment variables. These variables are then used to set the charset
of mails, which defaults to 'C'.
This does NOT affect the environment of tasks running under cron. For more information on how to modify the environment of tasks, consult
crontab(5).
The daemon will use, if present, the definition from /etc/timezone for the timezone.
The environment can be redefined in user's crontab definitions but cron will only handle tasks in a single timezone.
SEE ALSO
crontab(1), crontab(5)
AUTHOR
Paul Vixie <paul@vix.com>
4th Berkeley Distribution 19 April 2010 CRON(8)