How to get the serial number of your network device in linux?

1. sudo lshw -C network | grep -i serial
    lshw    - Command used to list the details of all available hardware in a system.
    -C      - Option used to specify hardware "class".
        network - We asked "lshw" to list only the network devices.

    grep    - Command used to print lines that matches the given pattern
    -i    - Option used to ignore case sensitivity
    serial    - Pattern used to fetch the lines that contains the word "serial"

Example:
$sudo lshw -C network | grep -i serial
[sudo] password for :
       serial: 78:f2:9e:f3:88:e7
   
2. /sbin/ifconfig | grep -i hwaddr or sudo ifconfig | grep -i hwaddr
    ifconfig-Command used to configure network devices.
    grep    - Command used to print lines that matches the given pattern
    -i    - Option used to ignore case sensitivity
    serial    - Pattern used to fetch the lines that contains the word "serial"


Example:
$/sbin/ifconfig | grep -i hwaddr
eth0      Link encap:Ethernet  HWaddr 78:f2:9e:f3:88:e7  

3. GUI Way
Applications -> System Tools -> Settings

                                  You will land in the following screen

Settings panel

Click on Network the following window will be open

Network settings panel

The green highlighted part is our interest.

How to create a Linux repository for the intranet/local machines?

1. Copy the whole repository of a particular linux distro(BOSS Gnu/linux, ubunutu) into a harddisk(external/internal), either by debmirror command or request/contact to the repository maintainers.
 1.1 Copy the repository using debmirror
   $debmirror -a -d -s --method= -h --root= --no-source --progress --ignore-release-gpg 
   switch a - architecture, d - distro etc..  Note: For more information read man pages of debmirror

ex: 
$debmirror -a i386 -d savir -s main,main/debian-installer --method=http -h packages.bosslinux.in --root=boss --no-source --progress --ignore-release-gpg /home/test/repository


2. install apache2 web server using
 $sudo apt-get install apache2

3. Either copy the whole content distro copy "/home/test/repository" to "/var//www" directory, or give a link to /home/test/repository in /var/www

4. find the ip address of the machine(where you do all the above procedures. i.e machine in which you keep the local/intranet repository/server) using
 $sudo ifconfig

5. add the following line as first entry in the  /etc/apt/sources.list file of all the linux machines that connected to the intranet as follows
 deb http:///boss savir main contrib non-free

6. Try apt-get update from the client machines if it updates fine, everything is fine.  Your local intranet repository is setup successfully.