Hi !!
I'm begginer in ubuntu , but when i want to start using it i found these problems with internet that i don't have in my Laptop . nothing works , no Modem no wireless. i was searching for solutions in internet and i found your Forum so i hope that you help me to start with ubuntu .
thank you very much

here are some information that you may need about y laptop

sudo lshw -C network

*-network UNCLAIMED
description: Network controller
product: Realtek Semiconductor Co., Ltd.
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: latency=0
resources: ioport:3000(size=256) memory:c2400000-c2403fff
*-network
description: Ethernet interface
product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth0
version: 05
serial: 7c:05:07:05:5e:60
size: 10Mbit/s
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl_nic/rtl8105e-1.fw latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:42 ioport:2000(size=256) memory:c0004000-c0004fff memory:c0000000-c0003fff



~$ iwconfig
lo no wireless extensions.


eth0 no wireless extensions.


~$ lspci -nn | grep 0280
02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:8723]