Junos OS

This article is about Junos OS. For the Austrian liberal youth organization, see JUNOS – Young liberal NEOS. For the Canadian music awards, see Juno Award. For pluralized Juno, see Juno (disambiguation).
Junos OS
DeveloperJuniper Networks
OS familyUnix-like
Working stateCurrent
Source modelClosed source and open source
Initial releaseJuly 7, 1998 (1998-07-07)
Latest release25.4 / December 22, 2025 (2025-12-22)
Available inEnglish
UserlandFreeBSD or Linux
Default
user interface		Command-line interface
LicenseProprietary, FreeBSD License, GPL License
Official websitewww.juniper.net/us/en/products/network-operating-system.html

Junos OS (also known as Juniper Junos, Junos and JUNOS) is a FreeBSD-based, and later also Linux-based, network operating system used in Juniper Networks routing, switching and security devices.

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