A MIB browser for Linux : qtmib

qtmib is a simple and open source MIB browser for Linux based on QT. It supports SNMP v1 and v2c, network discovery, a lot of built-in MIBs and you can add your private MIB also (under ~/.config/qtmib/mibs).

To install it, simply go on the offical website and download the .deb or .rpm file from here