set in cronjob, man crontab first
For example, run the script every hour
Hi rdcwayx,
Thanx a lot, amazing ...cheers up , one thing that I want to clear is that for this corntab entry i have to execute this command in putty with the parameters guided by you , as i was planning to configure it , means shall i write this statement of crontab in a seprate file or in the main script itself..so that when I execute my main script file itself the process get spawned and from there onwards it should start as a daemon process..!!
will Nohup command is close to thing that I want to achieve...? I think work for this case please guide me so that Nohup should continue to run the this daemon process even after I log out..!!
I have simple shell script that I run as cron job every hour of the day. I would like to make it a daemon that runs far more frequently like every 30 seconds or so, but I have never made daemon before. How can I do this?
-Sam (7 Replies)
Hi,
I have about 500 binary files. I have a command to convert these files to text. The command usage is:
converter bin-file txt-file
I have to input the name of the binary file and the name of the text file. I'm thinking something like this will work, but not really sure:
for file in... (1 Reply)
get email notification from from system when a process from XXXX user takes longer than 15 min run.Let me know the time estimation for the same.
hi ,any one please tell me , how to write a script to get email notification from system when a process from as mentioned above a xxxx user takes... (1 Reply)
hi all,
I write a shell script which search file in particular folder and copy another folder.after that i compare two folder if file did not match then copy file from one to another folder.Both New and New1 folder contains file with different name.
The code of my script is here
#!/bin/bash
... (4 Replies)
I am trying to create a service to always run and monitor a script that has a tendency to hang, we could not find what is causing it to hang so are in the process of completely reprogramming just about everything, however, that will take upto 6 months.
So I need to create this to monitor the... (5 Replies)
Hi,
I have one query that is suppose if I have a script that pick up some files from source folder and put it into destination folder , and I want this script to run after every 1 hour, to make it configurable as per that I have options like crontab and nohup but when I test this script I have to... (2 Replies)
Say i have a simple example:
root@server # cat /root/scripts/test.sh
while sleep 5
do
echo "how are u mate" >> /root/scripts/test.log
done
root@server #
Instead of using rc.local to start or another script to check status, I would like make it as daemon, where i can do the following:
... (2 Replies)
hey , i have to write a script to run a process through shell script and if the process runs successfully then return success.
i used nohup to start the process but nothing occured .
#!/bin/sh
nohup ./cvt -f MediationSources.xml &
can anyone pls help me
Thanks (3 Replies)
I wish to make a process run in the background, but only one instance of it, and not many,
so when the program is loaded, it has to check whether another instance of the same
program is running and if so to exit. How do I do this ? (4 Replies)
Discussion started by: sundaresh
4 Replies
LEARN ABOUT BSD
cron
CRON(8) System Manager's Manual CRON(8)NAME
cron - clock daemon
SYNOPSIS
/usr/sbin/cron
DESCRIPTION
Cron executes commands at specified dates and times according to the instructions in the files /etc/crontab and /etc/crontab.local. None,
either one, or both of these files may be present. Since cron never exits, it should only be executed once. This is best done by running
cron from the initialization process through the file /etc/rc; see init(8).
The crontab files consist of lines of seven fields each. The fields are separated by spaces or tabs. The first five are integer patterns
to specify:
o minute (0-59)
o hour (0-23)
o day of the month (1-31)
o month of the year (1-12)
o day of the week (1-7 with 1 = Monday)
Each of these patterns may contain:
o a number in the range above
o two numbers separated by a minus meaning a range inclusive
o a list of numbers separated by commas meaning any of the numbers
o an asterisk meaning all legal values
The sixth field is a user name: the command will be run with that user's uid and permissions. The seventh field consists of all the text
on a line following the sixth field, including spaces and tabs; this text is treated as a command which is executed by the Shell at the
specified times. A percent character (``%'') in this field is translated to a new-line character.
Both crontab files are checked by cron every minute, on the minute.
FILES
/etc/crontab
/etc/crontab.local
7th Edition October 23, 1996 CRON(8)