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You can try to install another driver for this Ethernet card sudo apt-get install r8168-dkms If that does not help, check the cable, contacts on both sides. Expanaition Realtek Ethernet RTL8111/8168 adapters are generally supported out of the box by Linux kernel. There is r8169 module for that. In most cases it works well. But some hardware revisions ...


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host doesn't use /etc/hosts but only queries the DNS servers in /etc/resolv.conf or given at the command line.


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You don't need to restart any services. When tested on a 14.04 server installation, the changes were reflected immediately. The only service that I think could be related is 'networking', but it's unnecessary to restart it.


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You can try: sudo ifconfig eth0 down sudo ifconfig eth0 up (substitute eth0 with your network card) but Arronical is right in theory: You don't need it.


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network manager -> Edit connection -> select wifi -> Edit -> Wifi-security -> change Key or change SSID or password key from config file sudo gedit /etc/NetworkManager/system-connections/wifi-name


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You can see the connected devices using nmap: nmap -O hotspotIP -O detects the OS of the device. Why not set up a password for your wifi hotspot, tell those that you allow to connect the password, and that's it. Otherwise, you can set it up a MAC address filter, placing the MAC addresses of those that you allow to connect in the whitelist. Anyone not in ...


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You must be more precise. Generally answer is to enable firewall. Ubuntu buildin firewall is ufw With command sudo ufw enable you will block all inbound traffic. Then you can allow traffic from only one host on port 80 with command sudo ufw allow from ip_address_of_host to any port 80 or allow only port 22 on server from any host sudo ufw allow ...


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Network Manager manages its own static routes - open network manager and select "wired connection 1". Select edit. select IPv4 tab. At the bottom of this page is a button for "Routes". That is where you add them. When done NM writes to a file with root permissions in its /etc/NetworkManager/system-connections/ directory called "Wired connection 1" Example ...


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The dnsmasq executable binary is included in the dnsmasq-base package. When dns=dnsmasq appears uncommented in NetworkManager.conf, NetworkManager runs a dnsmasq instance to serve as a local forwarding nameserver. The dnsmasq package includes configuration files which support running a dnsmasq instance independently of NetworkManager. The latter dnsmasq ...



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