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Sorry, I ignore my browser plugin will change my input when saving my problem.

I don't know the password when using " ssh [email protected]" Instead , "sudo -i ~/.ssh/id_ubuntucore [email protected]",it worked.So what's the password? Ubuntu Core 22.

yes .I install other dependencies and changed the kernel module 8169 to 8168

I install the driver(r8168-kmod), the connection is OK And I tried another way: [root~]#rmmod r8169 [root~]#modprobe r8169 [root~]#service network restart This way has some problem(it like driving a car with square wheels), but you can get on the internet with it

thanks for reply, Here's what I typed(I redo it) [root~]#uname -r 3.10.0-1160.e17.x86_64 [root~]#rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org [root~]#rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm [root~]#yum --disablerepo="*"...

I guess it's a driver problem. When I update kernel version , there were some conflicts between two version. I couldn't unstall the old version(it warning its need),I couldn't install the new(it warning some conflicts) [root~]#yum install -y kernel-ml-devel(some packages I checked)...

Forgive my ignorance

thanks [root~]# cat /proc/cpuinfo | grep name | cut -f2 -d | uniq -c 4 Intel(R) Celeron(R) CPU J1900 1.99GHz [root~]# lspci | grep vga Intel Corporation Atom Processor Z36xxx/Z37xxxIntegrated Graphics Controller a Mini Computer Motherboard. A standard mirror image(CentOs7 / CentOs8/ CentOs...

[Resolved]kernel Update issuse(CentOs7): When updated kernel from a old version, the network card driver need update too. use "#lspci --nn | grep -i net" to check matched driver(http://elrepo.org/tiki/DeviceIDs)