nload – Monitor bandwidth usage on Linux
I. What is Nload?
nload is a tool on Linux to monitor network traffic and bandwidth usage in real time. It helps you to monitor IN(incoming) and OUT(outgoing) traffic using graphs and provides a lot of additional information such as total amount of data transferred and average/minimum/minimum network usage multi.
II. Instructions for installing nload on a Linux server
To install nload on a Linux server , we follow these 2 steps.
Step 1: SSH into your Linux server
First we need SSH or access your VPS or server with root privileges first.
After successfully SSH , we continue with step 2 to execute the nload installation commands.
Step 2: Execute the nload installation command on the Linux server
nload can be easily installed by enabling the EPEL archive library on a CentOS or RHEL based system using the following commands.
-------- On CentOS and RHEL servers -------- yum install epel-release -y yum install nload -y -------- On Fedora 22+ server -------- dnf install nload
On Debian or Ubuntu servers , nload can be installed from the default system repositories with the following command.
sudo apt install nload
Below is a picture when I install nload on CentOS .
III. User manual nload
1. Launch nload
When you launch nload with the command , you can switch between network cards by pressing the left or right
nload arrow keys .
nload or nload eth0
Because my server only has 1 network card in use, I use the command directly
nloadto view information.
2. Shortcuts when using nload
After launching nload, you can use the following shortcuts:
- Use left and right arrow keys or Enter/Tab key to switch screen to next network card or use
nload -mto view multiple cards at once.
- Use F2 to bring up the options window.
- Use F5 to save the current settings to the user’s configuration file.
- Use F6 to reload settings from configuration files.
- Use q or Ctrl + C to exit nload .
To display multiple network cards at the same time and not display traffic graphs, please use the option
-m. And use the arrow keys to switch between as many devices as shown on the screen:
-aand interval to set the length in seconds of the average result (default is 300 ), for example you want to calculate the average bandwidth in 400 seconds then use the following command:
nload -a 400
-t and screen refresh interval in milliseconds (default value is 500 ). Note that specifying a refresh interval shorter than 100 milliseconds will result in inaccurate traffic calculations:
nload -ma 400 -t 600
You can specify the network card that you need to monitor with the following command.
nload devices device_name
device_name it with the name of your network card. To see the list of network cards of the server, you just need to use the command
lshw -class network -short
Hopefully with this article, you will be able to easily monitor server traffic, thereby making administrative work a lot easier.