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Full Discussion: anyone for cron?
Top Forums UNIX for Dummies Questions & Answers anyone for cron? Post 302379690 by buzzby on Friday 11th of December 2009 01:16:56 PM
Old 12-11-2009
Quote:
Originally Posted by pludi
It'd probably be better to create just 1 script that downloads the data (take a look at wget or curl for that), and, afterwards if successful, uploads it to the other server (plain FTP or SCP are good for that). That way you only have to create 1 script, and can be sure that the second task (uploading) only runs if the first has been successful.

My suggestion on how to start this:
  1. Find out how to down- and upload the file(s) from the command line. No script, no automation, just get to know the commands
  2. Find out how to create a script that does that, as a first step of automation. Nothing fancy, just get to know the possible return codes in case something goes wrong (Hint: $? is very useful for that)
  3. Outline a program flow for a script that could handle most situations without outside help. That will be the start for your real script
  4. If you've got your script ready and tested, write the crontab entry
If you need help anywhere along the way, just come back and ask, we don't bite. And I don't think you'll have problems with either shell scripting or Perl, as PHP was "inspired" heavily by both.
ahhh....so u r saying that 1 script will download and upload? so a perl or shell script will handle the upload and download. a cronjob will initiate the perl script? there has to be sufficient time passed for the download to have happened. i was thinking 2 scripts and 2 cronjobs. hmmm...interesting for sure. it has to be automated tho right from the get go. thats y i thought cronjobs needed to be set for both. isnt that right?
 

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service(8)						      System Manager's Manual							service(8)

NAME
service - run a System V init script SYNOPSIS
service SCRIPT COMMAND [OPTIONS] service --status-all service --help | -h | --version DESCRIPTION
service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working directory set to /. The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT. The supported values of COMMAND depend on the invoked script, service passes COMMAND and OPTIONS it to the init script unmodified. All scripts should support at least the start and stop commands. As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the start command. service --status-all runs all init scripts, in alphabetical order, with the status command. If the init script file does not exist, the script tries to use legacy actions. If there is no suitable legacy action found and COMMAND is one of actions specified in LSB Core Specification, input is redirected to the systemctl. Otherwise the command fails with return code 2. FILES
/etc/init.d The directory containing System V init scripts. ENVIRONMENT
LANG, TERM The only environment variables passed to the init scripts. SEE ALSO
chkconfig(8), ntsysv(8), systemd(1), systemctl(8), systemd.service(5) Jan 2006 service(8)
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