Creating Syslog entries and generating an alarm  

In this section, we are going to discuss the syslog protocol. We'll also learn about the logger command, which is a shell command and acts as an interface for the syslog module. The logger command makes entries in the system log. In this section, we are also going to create an alarm using a script.

Getting ready

Besides having a terminal open, we need to make sure you have a file to make an entry.

How to do it...

1. We are going to use the logger command to enter file_name into the syslog file. Run the following command:

$ logger -f file_name

2. Now we are going to write a script to create an alarm. Create a create_alarm.sh script and write the following code in it:

#!/bin/bash
declare -i H
declare -i M
declare -i cur_H
declare -i cur_M
declare -i min_left
declare -i hour_left
echo -e "What time do you Wake Up?"
read H
echo -e "and Minutes?"
read  M
cur_H=`date +%H`
cur_M=`date +%M`
echo "You Selected "
echo "$H:$M"
echo -e "\nIt is Currently $cur_H:...