Sponsored Content
Full Discussion: crontab questions
Top Forums UNIX for Dummies Questions & Answers crontab questions Post 25942 by hhh101 on Thursday 8th of August 2002 12:32:38 AM
Old 08-08-2002
Tools about crontab

Now I give a example:
5 18 * * 1-5 /usr/lib/sa/sa2 -s 8:00 -e 18:01 -i 1200 -A

and I give some comment:
the first column is miniue [0-59];
the second is hour[0-23];
the third is day[1-31];
the fouth is month[1-12];
the fifth is week[0-6] ,0 means sunday.
and the later is command that you want to run when time elapses.

for more information,you could use command "man crontab" in the UNIX shell.

Smilie
 

9 More Discussions You Might Find Interesting

1. Programming

Three Questions

I just want to know Three questions: 1.what is the name of c++ compiler used in Linux/Unix (like gcc compiler used for c ).And please tell me how can i compile the program of c++. 2. I have Devloped a program of Database in C Under Linux/Unix Enviornment and now i want to add some graphics... (4 Replies)
Discussion started by: at_renai2001
4 Replies

2. UNIX for Dummies Questions & Answers

questions

Dear Guys , I have some Questions , i need to have answeres for . 1. now if i took a back up for /etc/passwd and /etc/shadow , like simple copy .. and Install a new system , and paste those two files to the new system ... are the passwords and user info. going to work ?? is it posibble ? ... (1 Reply)
Discussion started by: tamemi
1 Replies

3. UNIX for Dummies Questions & Answers

3 questions in 1

Hi folks, 1. How can i know which version/type of unix i am running? any special commands?. I connect to a remote machine through SSH but have no clue what kind of unix that is (don't laugh :-)) 2. Why does the machine i connect to have $ sign as its shell prompt sign while solaris has #... (2 Replies)
Discussion started by: alikun
2 Replies

4. UNIX for Dummies Questions & Answers

crontab questions

I found a nice page that explains crontab but I was wondering can the cron table be edited in a way other than with crontab -e? In other words, directly in some editor. (2 Replies)
Discussion started by: eBay
2 Replies

5. Programming

two questions

hey all, I have question when am writing simple shell... in the child am calling execvp, i want the parent to know when execvp returns - 1. how can i let the parent know the result of execvp thanks in advance (9 Replies)
Discussion started by: joey
9 Replies

6. UNIX for Dummies Questions & Answers

crontab questions

I just started playing around with RHEL 5. What's the difference between adding crontab files to automate a daily task as opposed to adding them in the appropriate directory, such as cron.daily? (2 Replies)
Discussion started by: gaspol
2 Replies

7. Solaris

Questions regarding crontab entry

can anyone explains me the last fields in the below cron job. Here it will run on 31st 23:59.. what is mean by 1-7/2 (first to seventh month) what /2 represents 59 23 31 1-7/2,8-12/2 Thanks in advance. (2 Replies)
Discussion started by: rogerben
2 Replies

8. Homework & Coursework Questions

Print questions from a questions folder in a sequential order

1.) I am to write scripts that will be phasetest folder in the home directory. 2.) The folder should have a set-up,phase and display files I have written a small script which i used to check for the existing users and their password. What I need help with: I have a set of questions in a... (19 Replies)
Discussion started by: moraks007
19 Replies

9. UNIX for Dummies Questions & Answers

Vi questions

Hello, I would like to know how we can highlight/select a section of a file in vi and delete that section if we don't want to use the dd command to delete one line at at time. There is one where we don't want to delete the whole line , but up to a certain word. (2 Replies)
Discussion started by: Pouchie1
2 Replies
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)

Featured Tech Videos

All times are GMT -4. The time now is 05:14 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy