Nimbus Mono Font Download is available free from FontGet. Nimbus Mono is a Free Font for commercial use created by URW++. Nimbus Mono is a Bold type font that can be used on any device such as PC, Mac, Linux, iOS and Android. This font has 4 styles available
Nimbus Mono Regular
Nimbus Mono Regular Oblique
Nimbus Mono Bold
Nimbus Mono Bold Oblique).
From Wikipedia: Nimbus Mono is a monospaced typeface created by URW Studio in 1984, and eventually released under the GPL and AFPL (as Type 1 font for Ghostscript) in 1996 and LPPL in 2009. It features Normal, Bold, Italic, and Bold Italic weights, and is one of several freely licensed fonts offered by URW++. Although the characters are not exactly the same, Nimbus Mono has metrics that are very similar to Courier and Courier New.
It is one of the Ghostscript fonts, free alternatives to 35 basic PostScript fonts (which include Courier). It is a standard typeface in many Linux distributions.