Loading JunOS on an MX series router

• See JunOS knowledge base: https://kb.juniper.net/InfoCenter/index?page=content&id=KB11409
• Put the jinstall-*.tgz file on a FAT32 formatted USB drive and place it in the router's USB port
• Connect to the router's console as root user
• Start a shell session: start shell
• Create a temporary folder and mount the USB drive:
  • mkdir /mnt/usb
  • mount -t msdosfs /dev/da1s1 /mnt/usb
• Copy the jinstall file to the local file system: cp /mnt/usb/jinstall-ppc-14.2R7.5-domestic-signed.tgz /var/tmp/
• Unmount the USB drive and disconnect it: umount /mnt/usb