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NVRAM file system

As explained in Acing the CCNA Exam: Volume 2 Advanced Networking and Security

The NVRAM file system is the Cisco IOS file system associated with nonvolatile memory that stores the startup configuration.

The NVRAM file system is the Cisco IOS storage location associated with nonvolatile RAM. It stores the startup-config file, which contains the configuration used when the device starts. section 8.1.2

Inspecting startup-config

Switch# dir nvram: Directory of nvram:/ 2049 -rw- 5449 startup-config 2050 ---- 3573 private-config The directory confirms that startup-config resides in nvram:. Use more nvram:startup-config to read it.

How Acing the CCNA Exam: Volume 2 Advanced Networking and Security covers it

How deep it goes
Explains the storage type and verifies its contents with show file systems, dir, and more commands.
Examples
Uses show file systems, dir nvram:, and more nvram:startup-config to inspect NVRAM and startup-config.
What it assumes
Assumes basic Cisco IOS file-system terminology while distinguishing NVRAM from other storage locations.
What you can do after
Operate Cisco IOS file-system commands to locate and inspect the startup configuration in NVRAM.
How it connects
Connects NVRAM with Cisco IOS file systems, startup configuration, running configuration, flash memory, and TFTP.
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