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I ran:

sudo apt update
sudo apt upgrade

And after restart, when I typed my password and pressed enter the system froze and then the login screen reappeared. I saw some messages, one of which was something like Load kernel modules error.

I'm able to get into tty1 (ctrl+alt+f1). I have tried to update and upgrade using APT again, but WiFi and LAN are not working.

I have tried to start this interfaces but I got no interface for eth0 and wlan0, when I try sudo ifup eth0

How I can fix my system?

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Reboot and press the Shift key until the Grub menu appears. Then scroll down to Advanced Options for Ubuntu. Scroll down to an older kernel without upstart or recovery option and see if it will boot then.

Then you can sudo apt-get install --reinstall linux-image-generic linux-headers-generic and see if it works after a normal reboot

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