How to Install USB to 2.5G Network on Ubuntu 20.04

Download DriverGenius USB-2.5G Network RealTek RTL8156 2.5G Driver or DriverGnenius website. 

# sudo tar jxvf r8152.53.56-2.15.0.tar.bz2, you will get the following unzipped files.

2021-12-21 11:36 <DIR> .
2021-12-21 11:36 <DIR> ..
2021-03-02 16:40 3,823 50-usb-realtek-net.rules
2021-04-20 11:37 19,761 compatibility.h
2021-12-21 11:36 0 list.txt
2020-09-14 15:36 1,041 Makefile
2021-04-20 10:42 609,871 r8152.c
2020-08-04 14:37 962 ReadMe.txt

# make
# make install

you may have to run the following command after installing the driver.

# sudo depmod -a
# sudo update-initramfs -u

More of the descriptions, please refer to Readme.txt.