Sponsored Content
Full Discussion: Crontab update
Top Forums Shell Programming and Scripting Crontab update Post 303016348 by jim mcnamara on Tuesday 24th of April 2018 11:43:23 PM
Old 04-25-2018
You can use sed or awk to change the file. However that is not 100% safe. Some few older UNIXes do not "see" changes to crontab files unless the crontab -e [username] command is used. Not vi. Not sed. Not awk.

What OS and version do you have? -- the output of
Code:
 uname -a

is perfect.
 

9 More Discussions You Might Find Interesting

1. Solaris

Unable to update the Crontab

Hi Everyone, Each time I do update the crontab, it gets reset after exiting from the telnet session. I'm using Solaris 2.8 So it goes like this: Step 1: Login as root, from a telnet session Step 2: Crontab -e (I make modification) Step 3: Save and exit Step 4: Type crontab -l , changes... (4 Replies)
Discussion started by: Jeremy3
4 Replies

2. UNIX for Dummies Questions & Answers

UNIX "Crontab update"

Is there another location to update a cron that's run daily. I have updated the root cron located "/var/spool/cron/crontabs " After the update the cron doesn't run at the new time it was set at. It continues to run at the old time. Checking the root cron after it has been updated show the... (3 Replies)
Discussion started by: ddrivera
3 Replies

3. UNIX for Advanced & Expert Users

Pro*C Update not working from Crontab

Dear All, I have writen a Pro*c program that does a data base select,insert,update statements and I have scheduled the program to run from crontab, It is runing fine for the select insert and commit statement till it reaches the update statement , it throws the following error: SQL On IPB... (2 Replies)
Discussion started by: alhallay
2 Replies

4. UNIX for Dummies Questions & Answers

How to get the last crontab

Hi all, can anybody tell how to get the last crontab if it is deleted. is there any way to get the crontab back? or it will it be staored anywhere ? its very urgent, can anybody help for the same? Thanks, Vinay (5 Replies)
Discussion started by: vinayakatj56
5 Replies

5. Solaris

Install update 6 on solaris with update 3

I want to update my solaris 10 server which is currently on update 3 stage. A new application require it to be on update 6. What is the best way to make it update 6. should i just install the patch or should i go for the liveupgrade?? thanks for you help in advance (3 Replies)
Discussion started by: uxravi
3 Replies

6. Solaris

Is it possible to "upgrade" Sol10 update 9 to update 10?

Is it possible to "upgrade" Sol10 update 9 to update 10 by booting from the DVD? I had never even tried this until a user asked me to do it, so i tried and it just hung there after the part where it reads the rules.ok file. Is this even possible to upgrade? or does it have to be a new install. ... (5 Replies)
Discussion started by: BG_JrAdmin
5 Replies

7. Programming

MYSQL - trigger update on record insert or update

Right I have a MYSQL database with table1 with 3 columns, colA, colB and colC. I want to combine the data in the 3 columns into a 4th column names col_comb. Here's the SQL command that works: UPDATE table1 SET `col_comb` = CONCAT( `colA` , ' - ', `colB` , ', ', `colC` ); So now I want this... (5 Replies)
Discussion started by: barrydocks
5 Replies

8. Red Hat

RedHat 5 update 9 BASH update issue

Hi i want to update the BASH because of the "shell shock" vulnerability. my RedHat 5 is clean install with the default mirror site. when im running the command: yum update bash im getting a message saying there is no update. you can see in the attach picture... what am i doing wrong? is... (4 Replies)
Discussion started by: guy3145
4 Replies

9. Solaris

How to update Solaris 10 Update 3 to Update 11?

Hi friends, We have a Solaris machine running 10 update 3 -bash-3.2# cat /etc/release Solaris 10 11/06 s10s_u3wos_10 SPARC Copyright 2006 Sun Microsystems, Inc. All Rights Reserved. Use is subject to license terms. ... (6 Replies)
Discussion started by: prvnrk
6 Replies
CRONTAB(1)						      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
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, 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. If the -u option is given, it specifies 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(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. 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. SEE ALSO
crontab(5), cron(8) FILES
/etc/cron.allow /etc/cron.deny 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. AUTHOR
Paul Vixie <paul@vix.com> 4th Berkeley Distribution 29 December 1993 CRONTAB(1)
All times are GMT -4. The time now is 07:24 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy