How to implement send_alert function?

Here's a simple implementation of the send_alert function in a Bash script. This function can send an alert via email or log it to a file. Below are two examples:

Example 1: Send Alert via Email

send_alert() {
  local alert_type=$1
  local usage=$2
  local recipient="your_email@example.com"
  
  echo "Alert: $alert_type usage is at $usage%" | mail -s "$alert_type Alert" "$recipient"
}

Example 2: Log Alert to a File

send_alert() {
  local alert_type=$1
  local usage=$2
  local log_file="/var/log/cpu_alerts.log"
  
  echo "$(date): Alert: $alert_type usage is at $usage%" >> "$log_file"
}

Usage

You can call this function in your script like this:

if ((cpu_usage >= CPU_THRESHOLD)); then
  send_alert "CPU" "$cpu_usage"
fi

Notes:

• For the email method, ensure you have a mail transfer agent (like sendmail or postfix) configured on your system.
• For logging, make sure the script has permission to write to the specified log file.

Feel free to modify the function to suit your alerting needs!