Crontab -e option is used to edit the crontab file. if the file already exist then it will open the existing file otherwise it will create a new file in your /tmp directory.
-l option is used for to list the crontab entries
-r option is used for to remove the crontab entries
crontab entry format:
m h dom mon dow command
* * * * * command to be executed
- - - - -
| | | | |
| | | | +----- day of week (0 - 6) (Sunday=0)
| | | +------- month (1 - 12)
| | +--------- day of month (1 - 31)
| +----------- hour (0 - 23)
+------------- min (0 - 59)
Hi,
I am accessing CRON via telnet and want to set up some jobs. I have typed crontab -e to edit my cronfile but I can't seem to enter anything when I type on my keyboard. All I have is a flashing cursor at the top with ~ on the start of each line.
How can I enter the jobs and save this... (9 Replies)
Hi
I am not able to edit crontab.
Following is the comand that is being issued
$crontab -e
2764 ............ This is what I am able to see
But when I do
$crontab -l
List of all the crontab entry is displayed.
Also I am seeing one entry in my /etc/cron.d
prw------- 1 root ... (6 Replies)
Hello All,
Hopw all is fine. I am newbie to Unix. I am using Bourne Shell (sh). One of the question I have is that I am trying to read XML file and based on reading that XML file I want to run different java programs at different hours. Meaning
05 14 * * * java ./program1
10 14 * * * java... (3 Replies)
Hi
since we migrated from Solaris 8 to Solaris 10 I do miss a nice feature when editing crontab with vim editor: no more color highlighting after starting to edit. Well there is a hack, see below.
I did define:
export EDITOR='vim -c ":source /export/home/duc904/.vimrc"'
Under Sol8 when... (2 Replies)
I'm using fedora 5 and sql 5.0. I'm trying to edit the crontab to perform automatic backups of my database. For some reason it isn't working. Here is what I have so far.
15 2 * * * /usr/bin/mysqldump -opt -all-databases u root -ppassword -h localhost... (10 Replies)
I am working on Solaris machine.
I have to add a cron for some operation, nut in SSH terminal crontab -l shows all related crons, but crontab -e instead of opening vi editor shows some number.
Could any body tell what can be issue? (16 Replies)
Hi All,
Ref: "build crontab from a text file" in same forum. (I am not allowed to post URL's in the first post)
We are reorganizing our UNIX Crontab file by first making changes in a word pad text file. The intent is to then copy it back to Crontab. Will this work? Copy and Paste does not... (6 Replies)
Hi all,
I am trying the following
I am hoping that the crontab would be changed.
but it prints the previous crontab and says
Can anyone tell me the correct ksh command that should be used here?
I don't want to edit the crontab with crontab -e, I need to edit it via ksh.
Thank... (2 Replies)
Hi,
OS - SunOS
I gave crontab -e then it returns zero.
$ crontab -e
0
?
?
Crontab status -
$ ps -ef | grep cron
root 2481 1 0 May 12 ? 0:18 /usr/sbin/cron
Please help (9 Replies)
Discussion started by: nag_sathi
9 Replies
LEARN ABOUT FREEBSD
crontab
CRONTAB(1) BSD General Commands Manual CRONTAB(1)NAME
crontab -- maintain crontab files for individual users (V3)
SYNOPSIS
crontab [-u user] file
crontab [-u user] { -l | -r | -e }
DESCRIPTION
The crontab utility 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, they are not intended to be edited directly.
If the allow file exists, then you must be listed therein in order to be allowed to use this command. If the allow file does not exist but
the deny file does exist, then you must not be listed in the 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. The format of these files is one username per line, with no leading or trailing whitespace. Lines of other formats will
be ignored, and so can be used for comments.
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 following options are available:
-u Specify the name of the user whose crontab is to be tweaked. If this option is not given, crontab examines ``your'' crontab, i.e.,
the crontab of the person executing the command. Note that su(1) can confuse crontab and that if you are running inside of su(1) you
should always use the -u option for safety's sake.
-l Display the current crontab on standard output.
-r Remove the current crontab.
-e Edit the current crontab using the editor specified by the VISUAL or EDITOR environment variables. The specified editor must edit
the file in place; any editor that unlinks the file and recreates it cannot be used. After you exit from the editor, the modified
crontab will be installed automatically.
FILES
/var/cron/allow List of users allowed to use crontab
/var/cron/deny List of users prohibited from using crontab
/var/cron/tabs Directory for personal crontab files
DIAGNOSTICS
A fairly informative usage message appears if you run it with a bad command line.
SEE ALSO crontab(5), cron(8)STANDARDS
The crontab command conforms to IEEE Std 1003.2 (``POSIX.2'') with the exception that the dangerous variant of calling crontab without a file
name in the first form of the command is not allowed by this implementation. The pseudo-filename '-' must be specified to read from standard
input. The new command syntax differs from previous versions of Vixie Cron, as well as from the classic SVR3 syntax.
AUTHORS
Paul Vixie <paul@vix.com>
BSD May 13, 2010 BSD