I am new to ubuntu, but have to set up R/Rstudio server and work remotely.
Just moved the ubuntu server (Ubuntu 20.04) back home, and the connection became unstable while other PCs are working well.
Test connection with ping 8.8.8.8, shall stay connected for a short moment and soon turns unreachable.
when checking the ifconfig, the inet disappears as the pics.
after sudo dhclient eth0, the connection might come back for a while, but won't last long. Have tried crontab to re-initiate the ith0, but don't know why, it doesn't work.
also tried to modify the netplan, interface, but still not working.
Please advise.
---update
Here is the result for sudo lshw -C network
