snmpdf

Fetch the disk space usage

$ snmpdf -v [version] -c [community] [ip]

$ snmpdf [[-h|--help]]

snmpdf [OPTIONS] HOSTNAME

-C COMMUNITY
    Specifies the SNMP community string to use for authentication. Default is 'public'.

-h
    Displays a help message.

-H
    Show human-readable output.

-m MIB
    Load specific MIB file.

-p PORT
    Specifies the SNMP port number to use. Default is 161.

-v VERSION
    Specifies the SNMP version to use (1, 2c, or 3). Defaults to 1.

-V
    Displays the snmpdf version number.

HOSTNAME
    The hostname or IP address of the device to query.

The `snmpdf` command queries a network device for disk space usage information using Simple Network Management Protocol (SNMP). It functions similarly to the standard `df` command, but retrieves the information remotely from devices supporting the DISK-MIB or UCD-DISKIO-MIB. This allows administrators to monitor disk usage on remote servers and network devices without needing direct access to the machine itself. `snmpdf` requires the Net-SNMP libraries to be installed. The output format is designed to be easily readable and provides a summary of each disk or partition, showing total space, used space, available space, and percentage of disk space used. It's a valuable tool for network monitoring and capacity planning. Be aware that accurate results depend on the device's SNMP configuration and the information exposed by the MIB. The command's effectiveness also relies on the network connectivity between the host running `snmpdf` and the target device.

The `snmpdf` command relies on the target device correctly implementing the DISK-MIB or UCD-DISKIO-MIB. Inaccurate or missing data from the device will result in incorrect output. Firewall rules or network connectivity issues can prevent `snmpdf` from successfully querying the device. Also, be aware of the security implications of using SNMP, especially SNMPv1 and v2c with community strings. SNMPv3 with authentication and encryption is recommended for secure environments.

The command primarily relies on the DISK-MIB (RFC 2790) and UCD-DISKIO-MIB. The MIB must be installed and configured correctly on the SNMP manager for `snmpdf` to function properly.

Using SNMPv1 or v2c with the default 'public' community string poses a security risk. It's crucial to use strong community strings or, preferably, migrate to SNMPv3 with authentication and encryption for secure communication. Ensure appropriate access control lists (ACLs) are in place to restrict SNMP access to authorized hosts only.

df(1), snmpwalk(1), snmpget(1), netstat(1)