Well the first question is what errors are you trying to analyze (httpd, login, email, etc.)?
Then what do you want to look for and what do you want the script to do with errors it finds (email them to you, post to a file, etc.)?

There are already logs for httpd (Apache) for both successful access and errors. Normally they are kept in the /var/log/httpd directory but this can be changed in your httpd.conf file.

Shell Scripting Syntax (Toggle Plain Text)

<VirtualHost 10.1.2.3>
ServerAdmin webmaster@host.foo.com
DocumentRoot /www/docs/host.foo.com
ServerName host.foo.com
ErrorLog logs/host.foo.com-error_log
TransferLog logs/host.foo.com-access_log
</VirtualHost>

<VirtualHost 10.1.2.3> ServerAdmin webmaster@host.foo.com DocumentRoot /www/docs/host.foo.com ServerName host.foo.com ErrorLog logs/host.foo.com-error_log TransferLog logs/host.foo.com-access_log </VirtualHost>

I use separate sets of log files for each domain on the server.

hat you are probably looking for is something like "logwatch". It monitors your logs and sends you a report daily for attempted hacks, login failures, web site failures etc. Google logwatch and you will see several links.

Here's an example of something I'm using to monitor an application log for a specific error. I'll put some generic variables in

Shell Scripting Syntax (Toggle Plain Text)

#!/bin/bash
 
# Set some variables here
logfile="/path/to/logfile"
pattern="this.is.an.error"
email="user@example.com"
 
# read each new line as it gets written
# to the log file
tail -fn0 $logfile | while read line ; do
 
  # check each line against our pattern
  echo "$line" | grep -i "$pattern"
 
  # if a line matches...
  if [ $? = 0 ]; then
 
    # send an email!
    echo "Found an error: $line" | mail $email -s ERROR
 
  fi
done

#!/bin/bash # Set some variables here logfile="/path/to/logfile" pattern="this.is.an.error" email="user@example.com" # read each new line as it gets written # to the log file tail -fn0 $logfile | while read line ; do # check each line against our pattern echo "$line" | grep -i "$pattern" # if a line matches... if [ $? = 0 ]; then # send an email! echo "Found an error: $line" | mail $email -s ERROR fi done

I hope this helps!

-G