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Ubuntu Network Configuration

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Tutorial

network proxy

  • System wide: Network—>None/Manual
  • chrome: can not set
  • firefox: about:preferences—> Network Proxy

eth0 config

rename xxx to eth0

errors may occur:

Ubuntu networking restart | cannot find device 'eth0'

check eth0 

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dmesg | grep eth 

[5.715564] e1000 0000:02:01.0 eth0: (PCI:66MHz:32-bit) 00:0c:29:7d:bf:43
[5.715573] e1000 0000:02:01.0 eth0: Intel(R) PRO/1000 Network Connection
[5.719709] e1000 0000:02:01.0 ens33: renamed from eth0

and we get ens33 renamed from eth0, we need to change it back to eth0.

solution

  1. edit grub and update

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    $ sudo vim /etc/default/grub

    #GRUB_CMDLINE_LINUX=""
    GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0"

    $ sudo update-grub

  2. edit network interfaces /etc/network/interfaces

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    auto lo
    iface lo inet loopback

    auto eth0
    iface eth0 inet static
    address 192.168.1.77 
    netmask 255.255.255.0
    gateway 192.168.1.1

  3. reboot 

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    sudo reboot now

  4. check eth0

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    $ sudo ifconfig

    eth0      Link encap:Ethernet  HWaddr 80:fa:5b:47:92:8a  
                inet addr:192.168.1.77  Bcast:192.168.1.255  Mask:255.255.255.0
                UP BROADCAST MULTICAST  MTU:1500  Metric:1
                RX packets:0 errors:0 dropped:0 overruns:0 frame:0
                TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
                collisions:0 txqueuelen:1000 
                RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

    lo        Link encap:Local Loopback  
                inet addr:127.0.0.1  Mask:255.0.0.0
                inet6 addr: ::1/128 Scope:Host
                UP LOOPBACK RUNNING  MTU:65536  Metric:1
                RX packets:4640 errors:0 dropped:0 overruns:0 frame:0
                TX packets:4640 errors:0 dropped:0 overruns:0 carrier:0
                collisions:0 txqueuelen:1000 
                RX bytes:865530 (865.5 KB)  TX bytes:865530 (865.5 KB)

OK. Now we get eth0,wlan0 properly set.

ldconfig

libEGL

error

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$ sudo ldconfig

/sbin/ldconfig.real: /usr/lib/nvidia-384/libEGL.so.1 is not a symbolic link
/sbin/ldconfig.real: /usr/lib32/nvidia-384/libEGL.so.1 is not a symbolic link

fix

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sudo rm /usr/lib/nvidia-384/libEGL.so 
sudo rm /usr/lib/nvidia-384/libEGL.so.1 

sudo ln -s /usr/lib/nvidia-384/libEGL.so.384.90 /usr/lib/nvidia-384/libEGL.so.1
sudo ln -s /usr/lib/nvidia-384/libEGL.so.1 /usr/lib/nvidia-384/libEGL.so

# fix lib32
sudo rm /usr/lib32/nvidia-384/libEGL.so 
sudo rm /usr/lib32/nvidia-384/libEGL.so.1 

sudo ln -s /usr/lib32/nvidia-384/libEGL.so.384.90 /usr/lib32/nvidia-384/libEGL.so.1
sudo ln -s /usr/lib32/nvidia-384/libEGL.so.1 /usr/lib32/nvidia-384/libEGL.so

list libEGL.so of lib

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$ ls -al libEGL.so*

lrwxrwxrwx 1 root root    33 1月   8 11:24 libEGL.so -> /usr/lib/nvidia-384/libEGL.so.1
lrwxrwxrwx 1 root root    38 1月   8 11:24 libEGL.so.1 -> /usr/lib/nvidia-384/libEGL.so.384.90
-rw-r--r-- 1 root root 15012 9月  20 08:44 libEGL.so.384.90

list libEGL.so of lib32

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$ ls -al libEGL.so*

lrwxrwxrwx 1 root root    33 1月   8 11:24 libEGL.so -> /usr/lib32/nvidia-384/libEGL.so.1
lrwxrwxrwx 1 root root    38 1月   8 11:24 libEGL.so.1 -> /usr/lib32/nvidia-384/libEGL.so.384.90
-rw-r--r-- 1 root root 15012 9月  20 08:44 libEGL.so.384.90

check

$ sudo ldconfig

OK.

Reference

History

  • 20180108: created
  • 20180222: add eth0 part.