Does anyone know how I can simulate a cron job execution via UNIX scripting or is there a command/tool that simulate this?
I have a file I called "appSchedule.txt", it contains below lines:
If you noticed, it like a cron entries. What I need is for my script to output only (when I execute the script at any time/date) the the color that is scheduled to run based on the schedule given for it in the appSchedule.txt file. Just like what cron does, it executes only the lines that matches the schedule on it versus the current system time/date. Can anyone help me with the scripting for that?
Hi Gurus
I need to add a new cronjob to a list. There are already 7-8 cronjobs when I do crontab -e. I need to add a new cronjob without disturbing the existing ones. Can you please tell me how to do that. I am not so good in vi editor as well, but I can do it with some guidance. this is urgent,... (3 Replies)
Hi,
Anyone please let me know how to add an entry for crontab while there are few of entries already in.
When I execute crontab -e, the entries which are added already are displayed. But, I need to add one more entry to the crontab and then after that I need to remove the entry without... (1 Reply)
I run cron in solaris 10 zone. One cron job which syncing files to nfs mounted on container, creates after finishing another cron proccess(/usr/sbin/cron), and after 100 existing cron proccesses next cron job will not start. It's too weird for me, I'm not able to solve this problem. Theoretically... (3 Replies)
Hi,
I need to write cron job, which tries to build a project. It would check out code from a repository and then will attempt to build it .The results of the build would show up on a web-page (a table with rows, one for each build, should get updated; a link to the detailed log file; color green... (3 Replies)
Hi guys and gals,
I have this script that run perfectly when executed manually. If I place it in a cron to run on a schedule, it fails. Error is:
exec(): 0509-036 Cannot load program /usr/local/bin/getlogical because of the following errors:
0509-150 Dependent module... (7 Replies)
Writing a Tool to simulate non-sequential disk I/O (simulate db file sequential read) in C POSIX
I have over the years come across the same issue a couple of times, and it normally is that the read speed on SAN is absolutely atrocious when doing non-sequential I/O to the disks. Problem being of... (7 Replies)
Hi ,
I have removed a cron for particular user , but cron job seems to be running even after the cron entry is removed. The purpose of the cron was to sendmail to user ( it uses mailx utility )
I have restarted cron and sendmail service still user is getting mail alerts from the cron job. And... (4 Replies)
Hi,
1)
If some job supposed to run on 1st of every month at 7 AM
In cron job when we have a blackout on the 1st ( i.e when 1st falls on a sunday ) how can we make the job run the next business day?
2) How can we run a job on 25th of every quarter 7 AM(jan,apr,jul,oct)
And if 25th... (5 Replies)
Discussion started by: System Admin 77
5 Replies
LEARN ABOUT PLAN9
cron
CRON(8) System Manager's Manual CRON(8)NAME
cron - clock daemon
SYNOPSIS
auth/cron [-c]
DESCRIPTION
Cron executes commands at specified dates and times according to instructions in the files /cron/user/cron. It runs only on an authentica-
tion server. Option -c causes cron to create /cron/user and /cron/user/cron for the current user; it can be run from any Plan 9 machine.
Blank lines and lines beginning with # in these files are ignored. Entries are lines with fields
minute hour day month weekday host command
Command is a string, which may contain spaces, that is passed to an rc(1) running on host for execution. The first five fields are integer
patterns for
minute 0-59
hour 0-23
day of month 1-31
month of year 1-12
day of week 0-6; 0=Sunday
The syntax for these patterns is
time : '*'
| range
range : number
| number '-' number
| range ',' range
Each number must be in the appropriate range. Hyphens specify inclusive ranges of valid times; commas specify lists of valid time ranges.
To run the job, cron calls host and authenticates remote execution, equivalent to running rx host command (see con(1)). The user's profile
is run with $service set to rx.
Cron is not a reliable service. It skips commands if it cannot reach host within two minutes, or if the cron daemon is not running at the
appropriate time.
EXAMPLES
Here is the job that mails system news.
% cat /cron/upas/cron
# send system news
15 8-17, 21 *** helix /mail/lib/mailnews
%
SOURCE
/sys/src/cmd/auth/cron.c
SEE ALSO con(1), rc(1)CRON(8)