Install SONiC NOS Image

Install the NOS.
- Install the sonic-broadcom.bin using sonic-installer command.
- sonic-broadcom.bin file should have been already transferred to the sonic file-system using:
```
sudo sonic-installer install sonic-broadcom.bin
```
  Note: Alternatively, the image can be placed in a remote http server and sonic_installer command can be used after providing the http file location.
Check the Image status.
- Check the image status by using the following command.
```
sudo sonic-installer list
```
  The newly installed image should show up under "Next:" where,
  - Current : refers to current running image.
  - Next : refers to next boot up image.
  - Available : refers to all installed SONiC images.
Reboot.
- After installation, reboot the system and the new image should appear as one of the NOS install options (which is also the default).
```
sudo reboot
```

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