Juniper JUNOS Fundamentals

4. JUNOS Viewing, comparing, and loading configuration files

In Junos, you can view, compare, and load configuration files by using the following CLI commands:

1. Viewing the configuration: You can view the current running configuration by using the "show configuration" command. You can also view the startup configuration by using the "show configuration | display set" command.
2. Comparing the configuration: You can compare the running configuration with the startup configuration by using the "show configuration | compare" command. This command will show the differences between the two configurations, which can be useful for checking changes before committing them.
3. Loading the configuration: You can load a configuration file into the device by using the "load configuration" command. For example, to load a configuration file named "new-config.txt" from the local file system, you would use the following command:
```
load configuration from file new-config.txt
```

It's important to note that loading a configuration file will overwrite the current running configuration, so it's recommended to make a backup of the current configuration before loading a new one. Additionally, you should check the changes you made to the configuration using the "show | compare" command before committing the changes.

5. J-Web (core/common functionality only)

J-Web is the graphical user interface (GUI) for managing Juniper devices. Some of the core and common functionalities of J-Web include:

1. Monitoring the device status: J-Web provides a dashboard that displays the status of the device, including the CPU utilization, memory utilization, and the status of interfaces.
2. Configuring the device: J-Web provides a visual interface for configuring various features of the device, including interfaces, routing protocols, firewall filters, and security policies.
3. Monitoring network traffic: J-Web provides a tool for monitoring network traffic in real-time, allowing you to view the type and volume of traffic flowing through the device.
4. Monitoring logs: J-Web provides a centralized location for viewing device logs, which can be useful for troubleshooting issues with the device.
5. Updating the device software: J-Web provides a simple interface for updating the software on the device, allowing you to easily keep the device up-to-date with the latest software releases.

J-Web provides a user-friendly interface for managing Juniper devices, making it easy to monitor and configure the device even for users with limited networking knowledge.