Motorola Moto G7 Power (codename: ocean) was launched in the year February 2019. The phone came out of the box with Android 9.0 Pie. Recently this device has received the official TWRP recovery support. So, we will guide you to install the TWRP Recovery on Moto G7 Power on this page. This guide contains both the written instruction and video tutorial to help you install it quickly. Make sure to download the required files and then jump straight into instructions on installing TWRP Recovery and Root your Moto G7 Power.
Keep in mind that before heading over to the process, you will need to unlock the device bootloader at first. As the smartphone OEMs provide a locked bootloader to their devices due to some security concerns, you will need to unlock the bootloader to install any third-party file. Then you will be capable of installing TWRP Custom Recovery on your Moto G7 Power device and root as well. The TWRP Recovery can also take Nandroid backups, restore, wipe out system/data/cache, and more.

Motorola Moto G7 Power is powered by a Qualcomm Snapdragon 632 chipset coupled with 3GB of RAM and 32/64GB of internal storage. It also supports an external memory card. The device came out of the box with Android 9.0 Pie and was backed by a 5000 mAh battery (Non-removable). As far as the camera is concerned, the device has a single-camera setup with 12MP primary sensors and a selfie camera with an 8MP lens. Other connectivity option includes 4G-VoLTE, GPS, Glonass, Bluetooth, Mobile Hotspot, accelerometer, ambient light sensor, gyroscope, proximity sensor, and compass/ magnetometer. Etc. The Motorola Moto G7 Power comes with a rear fingerprint sensor feature.
TWRP Recovery and its Advantages
Team Win Recovery Project is an open-source software custom recovery image for Android-based devices. It provides a touchscreen-enabled interface that allows users to install third-party firmware and back up the current system, which is often unsupported by stock recovery images. – WikiPedia



I use linux, do not have access to windows as indicated; how may we in Linux land perform the same process fromn our linux systems without MS Windows ??