I just did this
and had no result. If this really is supposed to work, then I suspect that my terminal (Cygwin) might be bugged. Whenever I open crontab -e, I have to mash the keyboard for a bit before what I type comes visible, and if I try to paste code, then only the latter part of the code will be pasted. For example, when pasting
What shows up is
and there is a red alert in the bottom saying
Also, only occosionally when I push the Escape button I get to go on to type :wq to exit crontab -e. Usually when I press Esc, the code will just copy/paste itself some 20-30 times instead. There's also some other strange stuff going on, like when I use the arrow keys; sometimes it makes the "cursor" - the line that shows where I type - move, like it should, and other times it makes the letter A,B,C and D appear on the line above or below the code. This doesn't make much sense to me, but eventually I always get the code I want and I'm able to leave crontab, like now. As you can see, the code is as it should be. but maybe there's some invisible strange stuff going on here, messing up my crontab/tar scheme?
Instead of the first five fields, one of eight special strings may appear:
string meaning
------ -------
@reboot Run once, at startup.
@yearly Run once a year, "0 0 1 1 *".
@annually (same as @yearly)
@monthly Run once a month, "0 0 1 * *".
@weekly Run once... (2 Replies)
I have the following crontab entry.
0,30 00-16 * * *
This job runs every 30 minutes between the hours of 12:00AM and 4:00PM. How can I have it stop at 4:30PM instead?
Thank you,
David (3 Replies)
I have a script which shoud run after every 30 minutes.Though I know abt crontab, unfortunately I dont have access/authorization to use crontab in my terminal.
Could any one pls let me know how to schedule the script without crontab ?
Regards
Prashant:) (3 Replies)
Hi,
I have a script which will query the DB and added to crontab at 1,2,6,7 AM everyday and sends a email if count is 0.
Now the problem is, if crontab is disabled it doesn't sends a mail.
Please tell me how can I handle this situation in the script. (2 Replies)
All,
I'm a newbie with crontab and I need your help with schedule a cold-backup running every Sunday at 7am except 1st of the month.
Thank you so much. (2 Replies)
Hi,
My script is in $home/bin/sample.sh.
I want to run the script for 3times a day,
first execution will be at 08:00 am.
second execution will be at 16:00 pm
third will be at 23:59 pm.
what will be the entry with this requirement?? (1 Reply)
Hi all,
I would like to schedule a crontab script, which should run From 8pm Thursday to 2am Friday and it should run every 10 minutes. I have put a script like below, is it the correct one.
10 01,02,20,21,22,23,00 * * 4-5 /u01/app/test.ksh
Any other options available to schedule the same... (6 Replies)
Hi All,
How to schedule crontab on all day except sunday and monday means from tuesday to saturday at 06:00AM. (3 Replies)
Discussion started by: Riverstone
3 Replies
LEARN ABOUT REDHAT
cron
CRON(8) System Manager's Manual CRON(8)NAME
cron - daemon to execute scheduled commands (Vixie Cron)
SYNOPSIS
cron
DESCRIPTION
Cron should be started from /etc/rc or /etc/rc.local. It will return immediately, so you don't need to start it with '&'.
Cron searches /var/spool/cron for crontab files which are named after accounts in /etc/passwd; crontabs found are loaded into memory. Cron
also searches for /etc/crontab and the files in the /etc/cron.d/ directory, which are in a different format (see crontab(5)). 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 execut-
ing 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).
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.
SEE ALSO crontab(1), crontab(5)AUTHOR
Paul Vixie <paul@vix.com>
4th Berkeley Distribution 20 December 1993 CRON(8)