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Install Junos OS Software Package

To install the Junos OS software package on your device:

  1. Download the software package as described in Download Software Packages from Juniper Networks.
  2. Connect the console port on your Juniper Networks device to your management device and log in to the Junos OS CLI.
  3. (Optional) Back up the current software configuration to a second storage option. See the Software Installation and Upgrade Guide for instructions on performing this task.
  4. (Optional) Copy the downloaded software package to your device. We recommend to use FTP to copy the file to the /var/tmp/ directory.

    This step is optional because you can also install Junos OS when the software image is available at a remote location. These instructions describe the software installation process for both scenarios.

  5. Use the following command to install the new package on the device:

    Replace the variable option package with one of the following paths:

    • For a software package in a local directory on the device, use /var/tmp/package.tgz.

    • For a software package on a remote server, use one of the following paths, replacing the variable option package with the software package name.

      • ftp://hostname/pathname/package.tgz

      • https://hostname/pathname/package.tgz

    Junos OS comes in signed packages with digital signatures, ensuring that Juniper Networks software operates flawlessly. During installation of the software packages, Junos OS validates the signatures and the public key certificates used to sign the software packages digitally. If the signature or certificate is found invalid (for example, an expired certificate or the system fails to verify the certificate against the root certificate authority (CA) certificate stored in the Junos OS internal store), the installation process fails.

  6. Reboot the device to load the installation:
  7. Once the system completes rebooting, log in and use the show version command to verify the successful installation of the desired software version.