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+sudo insmod net_monitor.ko
+sudo dmesg | tail
+
+# mosi ifconfig ga nakereba
+sudo apt install net-tools
+
+# check network interfaces
+ip a
+
+# down/up
+sudo ifconfig enp0s3 down
+sudo ifconfig enp0s3 up
+
+# check log
+sudo less /var/log/syslog