Loading a configuration onto a JunOS device

• Copy your config file to a FAT32 formatted USB thumb drive (the drive must contain exactly one partition that stretches over the whole device)
• Boot up the Juniper device and connect to its serial console
• You should see a root> prompt
  • (If, right after login, you already are in shell mode (root@%) and the exit command will only log you out instead of bringing you into command mode (root>), you can issue the cli comamnd to get there.)
• Type start shell to get the root@% prompt
• Create a mount directory: mkdir /mnt/usb
• Plug in the USB drive and mount it: mount -t msdosfs /dev/da1s1 /mnt/usb
• Type exit to exit the shell
• From the root> prompt enter configure to get into config mode (you'll see a root# prompt)
• Variant A:
  • Use the following command to load the configuration: load override /mnt/usb/<config file name>
• Variant B:
  • Type load override terminal to paste in configuration commands (the Cisco way)
  • Type [ENTER] and then [Ctrl-D] to exit load mode
• Type commit to activate the loaded configuration and exit config mode with the exit command
• Unmount the USB drive (umount /mnt/usb in shell mode) before unplugging it