SquidGuard is a URL redirector used to use blacklists with the proxysoftware Squid. There are two big advantages to squidguard: it is fast and it is free.
Cron Scheduling
# Use the hash sign to prefix a comment
# +---------------- minute (0 - 59)
# | +------------- hour (0 - 23)
# | | +---------- day of month (1 - 31)
# | | | +------- month (1 - 12)
# | | | | +---- day of week (0 - 7) (Sunday=0 or 7)
# | | | | |
# * * * * * command to be executedminute This controls what minute of the hour the command will run on,
and is between '0' and '59'
hour This controls what hour the command will run on, and is specified in the 24 hour clock, values must be between 0 and 23 (0 is midnight)
dom This is the Day of Month, that you want the command run on, e.g. to run a command on the 19th of each month, the dom would be 19.
month This is the month a specified command will run on, it may be specified numerically (0-12), or as the name of the month (e.g. May)
dow This is the Day of Week that you want a command to be run on, it can also be numeric (0-7) or as the name of the day (e.g. sun).
user This is the user who runs the command.
cmd This is the command that you want run. This field may contain multiple words or spaces.
Disable Email
By default cron jobs sends a email to the user account executing the cronjob. If this is not needed put the following command at the end of the cron job line:
>/dev/null 2>&1Change where the email notification goes? Add the following to the file:
MAILTO=<email address>Want to suppress the email completely? Add the following to the end of the cron command:
>/dev/null 2>&1http://www.unixgeeks.org/security/newbie/unix/cron-1.html
http://argray.com/unixfaq/cron.shtml
Technology:
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