Introduction:

Monitoring bandwidth usage per user is useful for identifying high-traffic accounts, troubleshooting resource usage, and managing hosting limits. If you have SSH access to a cPanel server, you can quickly check individual user bandwidth consumption using a simple shell script.

Step 1: Create the Script File

Log in to your server via SSH and create a new file:

vi bandwidth

Add the following script:

#!/bin/bash

cd /var/cpanel/bandwidth/

ls | grep -v "\." | xargs -n 1 -izzz sh -c '
echo -n zzz " = ";
egrep "^$1\..*\.$2-all" zzz | awk -F"=" "
BEGIN {bytes=0}
{ bytes+=\$2 }
END {print bytes/1024/1024 \" MB\"}"
'

cd -

Step 2: Make the Script Executable

Save the file and provide execute permissions:

chmod +x bandwidth

Step 3: Run the Script

Execute the script by passing two parameters:

  • Month
  • Year

Syntax:

./bandwidth month year

Example:

To check bandwidth usage for January 2012:

./bandwidth 1 2012

Step 4: Display Top Bandwidth Consumers

To list the top 10 users consuming the highest bandwidth:

./bandwidth 1 2012 | sort -nrk 3 | head -10

This command will:

  • Sort the output in descending order
  • Display the accounts with the highest bandwidth usage first
  • Show bandwidth usage in MB

Example output:

user1 = 2048 MB
user2 = 1850 MB
user3 = 1502 MB

Mapping Usernames to Domain Names

If you want to identify which domain belongs to a username, check:

/etc/trueuserdomains

This file maps cPanel usernames to their corresponding domains.

Example:

example.com: user1
testsite.com: user2

Conclusion

Using this simple SSH script, you can quickly monitor bandwidth consumption for individual cPanel users without navigating through the control panel. This is especially useful for server administrators who need to track heavy bandwidth users and optimize server resource usage efficiently.

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