Project 2 background

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Project 2 background

• linux and related thing

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Linux -old time

• "Born" in early 1990s. Younger than me but may be
  older than you guys.
• Linus wrote the very first version, 0.01.
• Linus is still in charge, but thousand developers
  are contributing.

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• http//en.wikipedia.org/wiki/The_Cathedral_and_the
  _Bazaar
• http//en.wikipedia.org/wiki/TanenbaumE28093Tor
  valds_debate

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Linux -now

• The newest verison is 3.16.3.
• Get updates almost every week.
• It is the core part, kernel, of the system. A
  real linux system normally has much nore.

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Linux -source code

• Where to get linux source code
• https//www.kernel.org/
• How to read linux source code
• http//lxr.linux.no/linux

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Linux -"taste"
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Linux -usage

• /bin /run
• /root /sbin
• /cdrom /selinux
• /dev /srv
• /etc /sys
• /home /tmp
• /lib /usr
• /lib64 /var
• /media initrd.img
• /opt /root
• /proc /lostfound

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Linux -compile

• (1) make menuconfig
• (2) make (may also need make mrproper)
• (3) make modules_install
• (4) make install
• (5) reboot
• Now you have your own verison of linux
• http//www.youtube.com/watch?vvZaA2mRT5eg
• Demo

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Hints

• wget https//www.kernel.org/pub/linux/kernel/v3.x/
  linux-3.x.y.tar.gz
• tar zxvf FileName.tar.gz
• sudo apt-get install libncurses5-dev
• make menuconfig

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Kernel compiling

• In project 2, you will be modifying the kernel.
• Means you need to compile it once you change it
• Steps
• Download --Done
• Configure --To be done
• Build --Your job
• Install --Your job

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Kernel compiling

• Tips
• lspci
• list hardware in your machine
• If you are not sure, include it
• make oldconfig
• Use the old configuration file
• If you don't have one, get one first and name it
  .config

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grub

• Used for multi-operating systems load.
• When you install linux with window or Mac OS X,
  grub is installed and used automatically so you
  can choose which one to use.

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• You can manually change the grub file.
• BE CAREFUL!

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Virtual Machine

• Another way to use Linux(free) along with Windows
  and Mac OS X
• VMware, VirtualBox(free)

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• Project 2 will be due on 10/22