hi,
I have scripts which are running every 3 minutes. The scripts include connection to a database, using sqlplus. Sometimes, the connection fails (invalid username or password, locked user etc..) and the connection returns the error code, to the unix screen or to a file.
I want whenever there's... (2 Replies)
when i run the scripts from command line like
php ./file.php they run fine and it ends.
But i have them running in crontab every 5 minutes and they sometimes dont close. Can i write something to log why or force them to close after a certain amount of time by killing the pid? (2 Replies)
Hello Friends,
I've been searching solutions for an exceptional backup case recently, I need someone to guide me, suggest a method pls.
In a production system we have backup scripts, they are run by cron one after another, and monthly. There is 1 hour difference between each consecutive script... (1 Reply)
Hi all
I installed Debian and i have a few scripts that outputs what is happening.
The wierd part...after fresh install all works ok but after i open or edit Crontab it stops executing the scripts...and scripts runs manually so its not a problem with scripts...what happens is that i usually... (3 Replies)
hi,
i need to run one script in cron...
in that script has connect antoher server and doing sftp for file transfer to another script.
and going to be run another script in another server
ssh ravikus\@server2 /export/home/ravikus/scripts/GetDetailsC2b.sh
it is work fine when i run... (6 Replies)
hi,
instead of typing crontab -e i gave crontab -r and hit enter. So i lost all my scripts.
Is there any way to restore the deleted scripts?
Please help me out
Thanks
Ajay (3 Replies)
Hi,
I have a query related to UNIX Crontab scripts -
Issue: Server space on the db server got 100% full as a result of which the cron scripts did not run. The space utilization issue got resolved in the afternoon. The crons scheduled for a time post the resolution caught up. However the... (1 Reply)
Hi Forum,
Good Day!
I have created an empty html file wtih permissoin 777
created shell script(with permission 777) , code is below.
#=======================start==============
. /data09/oracle/apps_st/appl/D_oraapp095.env
rm -rf /home/mnp/Test_log.txt
echo... (1 Reply)
Hello all,
Hope all's well.
i'm not sure if this is possible but i have some scripts running in a crontab with different intervals, 1min, 5 min, etc.
As for a "cleaner" and better control of these scripts (as by time we will have hundred's of scripts used for the same purpose, i.e for Nagios... (4 Replies)
Discussion started by: nms
4 Replies
LEARN ABOUT X11R4
crontab
CRONTAB(1) General Commands Manual CRONTAB(1)NAME
crontab - maintain crontab files for individual users (Vixie Cron)
SYNOPSIS
crontab [ -u user ] file
crontab [ -u user ] [ -i ] { -e | -l | -r }
DESCRIPTION
crontab is the program used to install, deinstall or list the tables used to drive the cron(8) daemon in Vixie Cron. Each user can have
their own crontab, and though these are files in /var/spool/cron/crontabs, they are not intended to be edited directly.
If the /etc/cron.allow file exists, then you must be listed (one user per line) therein in order to be allowed to use this command. If the
/etc/cron.allow file does not exist but the /etc/cron.deny file does exist, then you must not be listed in the /etc/cron.deny file in order
to use this command.
If neither of these files exists, then depending on site-dependent configuration parameters, only the super user will be allowed to use
this command, or all users will be able to use this command.
If both files exist then /etc/cron.allow takes precedence. Which means that /etc/cron.deny is not considered and your user must be listed
in /etc/cron.allow in order to be able to use the crontab.
Regardless of the existance of any of these files, the root administrative user is always allowed to setup a crontab. For standard Debian
systems, all users may use this command.
If the -u option is given, it specifies the name of the user whose crontab is to be used (when listing) or modified (when editing). If this
option is not given, crontab examines "your" crontab, i.e., the crontab of the person executing the command. Note that su(8) can confuse
crontab and that if you are running inside of su(8) you should always use the -u option for safety's sake.
The first form of this command is used to install a new crontab from some named file or standard input if the pseudo-filename ``-'' is
given.
The -l option causes the current crontab to be displayed on standard output. See the note under DEBIAN SPECIFIC below.
The -r option causes the current crontab to be removed.
The -e option is used to edit the current crontab using the editor specified by the VISUAL or EDITOR environment variables. After you exit
from the editor, the modified crontab will be installed automatically. If neither of the environment variables is defined, then the default
editor /usr/bin/editor is used.
The -i option modifies the -r option to prompt the user for a 'y/Y' response before actually removing the crontab.
DEBIAN SPECIFIC
The "out-of-the-box" behaviour for crontab -l is to display the three line "DO NOT EDIT THIS FILE" header that is placed at the beginning
of the crontab when it is installed. The problem is that it makes the sequence
crontab -l | crontab -
non-idempotent -- you keep adding copies of the header. This causes pain to scripts that use sed to edit a crontab. Therefore, the default
behaviour of the -l option has been changed to not output such header. You may obtain the original behaviour by setting the environment
variable CRONTAB_NOHEADER to 'N', which will cause the crontab -l command to emit the extraneous header.
SEE ALSO crontab(5), cron(8)FILES
/etc/cron.allow
/etc/cron.deny
/var/spool/cron/crontabs
There is one file for each user's crontab under the /var/spool/cron/crontabs directory. Users are not allowed to edit the files under that
directory directly to ensure that only users allowed by the system to run periodic tasks can add them, and only syntactically correct
crontabs will be written there. This is enforced by having the directory writable only by the crontab group and configuring crontab com-
mand with the setgid bid set for that specific group.
STANDARDS
The crontab command conforms to IEEE Std1003.2-1992 (``POSIX''). This new command syntax differs from previous versions of Vixie Cron, as
well as from the classic SVR3 syntax.
DIAGNOSTICS
A fairly informative usage message appears if you run it with a bad command line.
cron requires that each entry in a crontab end in a newline character. If the last entry in a crontab is missing the newline, cron will
consider the crontab (at least partially) broken and refuse to install it.
AUTHOR
Paul Vixie <paul@vix.com> is the author of cron and original creator of this manual page. This page has also been modified for Debian by
Steve Greenland, Javier Fernandez-Sanguino and Christian Kastner.
4th Berkeley Distribution 19 April 2010 CRONTAB(1)