11-15-2011
How to find when cron is modified
Hi all,
We use cron "/usr/rdl/sc/cccron" to execute our jobs.
But sometimes it is being changed. but we are not sure when it is changed.
how could we find when cron is modified.
i checked cron by giving ls -l . but it is showing 2009 year.
ls -l /usr/rdl/sc/cccron
-r-xr-xr-x 1 nassim rdl 14111 Jun 15 2009 /usr/rdl/sc/cccron
we edit cron with the userid. the user id is test1.
also checked the file
ls -l /var/spool/cron/crontabs/test1
-rw------- 1 root rdl 403 Oct 28 14:02 /var/spool/cron/crontabs/test1.
but here it seems oct 28 2011. but i changed this cron with the userid on Nov 15 2011.
Could someone please help?
Thanks & Regards,
Divakar
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi All,
I am using the below command to check the files modified within last 24hours
find /home/karthik -mtime -1 -type f -exec ls -l {} \;
What parameter do i need to add in the above command to check the files modified in last 2 or 3 days
Kindly let me know if any other alternative... (2 Replies)
Discussion started by: karthikn7974
2 Replies
2. Shell Programming and Scripting
hello all im a newbie in the linux world ..i have just started creating basic scripts in linux ..i am using rhel 5 ..the thing is i wanted to create a find script where i could find the last modified file and directory in the directory given as input by the user and storing the output in a file so... (6 Replies)
Discussion started by: tarunicon
6 Replies
3. UNIX for Dummies Questions & Answers
hi,
I need to find all the modified files before 60 minutes in a folder.
Is that possible to find using mtime in minutes?
Suggestions please.
Thanks for looking into it...
Geetha (8 Replies)
Discussion started by: iamgeethuj
8 Replies
4. UNIX for Dummies Questions & Answers
How do I do it? Simple answers preferred... using BASH.. the less code the better.
I want to find out where Indesign is caching PDF tmp data ... I figure this is a good way to do it.. either way i wanna know how to do it. (2 Replies)
Discussion started by: glev2005
2 Replies
5. UNIX for Dummies Questions & Answers
Hello all - I've looked and have not been able to find a "find" command that will list the last modified date of files within a specific directory and its subdirectories. If anyone knows of such a command it would be very much appreciated!
If possible, I would like to sort this output and have... (5 Replies)
Discussion started by: MichaelH3947
5 Replies
6. Shell Programming and Scripting
Hi *,
I'm wondering if it possible to know WHO opened or modified a file last?
I know it's possible with some options of find and also ls to get when the file was modified last.
I'm currently supervising a file and have to log all users name who opened or modified it.
Thanx a lot for any... (3 Replies)
Discussion started by: Jabarod
3 Replies
7. Shell Programming and Scripting
Hi all,
We use cron "/usr/rdl/sc/cccron" to execute our jobs.
But sometimes it is being changed. but we are not sure when it is changed.
how could we find when cron is modified.
i checked cron by giving ls -l . but it is showing 2009 year.
ls -l /usr/rdl/sc/cccron
-r-xr-xr-x 1... (0 Replies)
Discussion started by: Divakar
0 Replies
8. UNIX for Dummies Questions & Answers
Hi all,
We use cron "/usr/rdl/sc/cccron" to execute our jobs.
But sometimes it is being changed. but we are not sure when it is changed.
how could we find when cron is modified.
i checked cron by giving ls -l . but it is showing 2009 year.
ls -l /usr/rdl/sc/cccron
-r-xr-xr-x 1... (2 Replies)
Discussion started by: Divakar
2 Replies
9. Shell Programming and Scripting
Hi All,
How to find a file modified more than once....
Thanks in advance (2 Replies)
Discussion started by: kmsekhar
2 Replies
10. UNIX for Dummies Questions & Answers
Hi,
From time to time, I have a cron job that I have to enable/disable/enable/disable. I just want to know if there is any way to insert cron entries or do this to enable/disable bit via a script instead.
It seems 'safer' to do this via a script rather than manual? I think :confused: or is... (10 Replies)
Discussion started by: newbie_01
10 Replies
CRON(8) BSD System Manager's Manual CRON(8)
NAME
cron -- daemon to execute scheduled commands (ISC Cron V4.1)
SYNOPSIS
cron [-n] [-x debugflags]
DESCRIPTION
cron is normally started during system boot by rc.d(8) framework, if cron is switched on in rc.conf(5).
It will return immediately so you don't have to start it with '&'.
cron searches /var/cron/tabs for crontab files which are named after accounts in /etc/passwd. Crontabs found are loaded into memory. cron
also searches for /etc/crontab which is in a different format (see crontab(5)). Finally cron looks for crontabs in /etc/cron.d if it exists,
and executes each file as a crontab.
When cron looks in a directory for crontabs (either in /var/cron/tabs or /etc/cron.d) it will not process files that:
- Start with a '.' or a '#'.
- End with a '~' or with ``.rpmsave'', ``.rpmorig'', or ``.rpmnew''.
- Are of zero length.
- Their length is greater than MAXNAMLEN.
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).
Events such as START and FINISH are recorded in the /var/log/cron log file with date and time details. This information is useful for a num-
ber of reasons, such as determining the amount of time required to run a particular job. By default, root has an hourly job that rotates
these log files with compression to preserve disk space.
Additionally, cron checks each minute to see if its spool directory's modtime (or the modtime on /etc/crontab or /etc/cron.d) 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 when-
ever a crontab file is modified. Note that the crontab(1) command updates the modtime of the spool directory whenever it changes a crontab.
The following options are available:
-x This flag turns on some debugging flags. debugflags is comma-separated list of debugging flags to turn on. If a flag is turned on,
cron writes some additional debugging information to system log during its work. Available debugging flags are:
sch scheduling
proc process control
pars parsing
load database loading
misc miscellaneous
test test mode - do not actually execute any commands
bit show how various bits are set (long)
ext print extended debugging information
-n Stay in the foreground and don't daemonize cron.
Daylight Saving Time and other time changes
Local time changes of less than three hours, such as those caused by the start or end of Daylight Saving Time, are handled specially. This
only applies to jobs that run at a specific time and jobs that are run with a granularity greater than one hour. Jobs that run more fre-
quently are scheduled normally.
If time has moved forward, those jobs that would have run in the interval that has been skipped will be run immediately. Conversely, if time
has moved backward, care is taken to avoid running jobs twice.
Time changes of more than 3 hours are considered to be corrections to the clock or timezone, and the new time is used immediately.
SIGNALS
On receipt of a SIGHUP, the cron daemon will close and reopen its log file. This is useful in scripts which rotate and age log files. Natu-
rally this is not relevant if cron was built to use syslog(3).
FILES
/var/cron/tabs cron spool directory
/etc/crontab system crontab file
/etc/cron.d/ system crontab directory
/var/log/cron log file for cron events
SEE ALSO
crontab(1), crontab(5)
AUTHORS
Paul Vixie <vixie@isc.org>
BSD
October 12, 2011 BSD