Introduction to LPIC-1 Training Topic 101: System Architecture

1. FORMATION LPIC-1

2. O_O : What the hell is LPIC ! >:(
LPIC-1 : Linux Server Professional Certification
LPIC-2 : Linux Network Professional Certification
LPIC-3 : Linux Entreprise Professional Certification

3. O_O : mmm, n’ why only LPIC-1?
LPIC-1 is about 10 topics, each one takes
1 session, LPIC-2 is about 13 and LPIC-3
is above 15 topics.. so count it !
and we are facing time constraints ://
so, we will be thankful if we finish LPIC-1,
and we will folks 8-)

4. O_O:sounds cool :3 tell me more! :v
The LPIC-1 will validate your ability to perform
maintenance tasks with the command line,
install & configure a computer running Linux
and be able to configure basic networking.

5. O_O : mmm :=)
it composed of two exams,101&102
1. System Architecture
2. Linux Installation and Package Management
3. GNU and Unix Commands
4. Devices, Linux Filesystems, Filesystem
Hierarchy Standard
Exam 101 Exam 102
5. Shells, Scripting and Data Management
6. User Interfaces and Desktops
7. Administrative Tasks
8. Essential System Services
9. Networking Fundamentals
10. Security

6. Topic 1 : System Architecture
101.1 Determine and configure hardware settings
101.2 Boot the system
101.3 runlevels

7. 101.1 Determine and configure hardware settings
weight : 2
● HAL, dbus, udev
● /sys, /proc, /dev
● lsmod, lsusr, lspci
● Kernel modules

8. 101.1 Determine and configure hardware settings
weight : 2
● HAL : Hardware Abstraction Layer
⇒ Intel/Frecom ⇒ eth
● dbus : HAL/kernel ⇐ ⇒ Applications
communication between the hardware&software
● udev : /dev/sda, /dev/sda1, /dev/sda2 ...
manages device nodes in the /dev directory

9. 101.1 Determine and configure hardware settings
weight : 2
● sysfs(/sys) : keeps all the infos about the
peripherals in /sys
● procdfs(/proc) : created in RAM when the pc
boot, read|write system info like cpuinfo(but
only temporary)
● devfs(/dev) : peripherals manager, replaced by
udev for Linux kernels 2.6.x

10. 101.1 Determine and configure hardware settings
weight : 2
● lsmod : lists kernel module
● lspci : shows pci devices
● lsusb : useb devices
lspcmcia, lshal, lshw

11. 101.1 Determine and configure hardware settings
weight : 2
insmod : insert kernel modules
rmmod : remove kenrel modules
modprobe : adds other required modules to
loaded ones.
/etc/modprobe.d/ : used to add/remove a
loadable kernel module (LKM) to the Linux
kernel

12. 101.2 Boot the system
weight : 3
Memtest : RAM test
dmeg(driver message) : prints the message
buffer of the kernel
⇒ LILO(Linux Loader)
⇒ GRUB(GRand Unified Bootloader)
bootloader

13. 101.2 Boot the system
weight : 3
/var/log/ : stores all the logs.
tail -f /var/log/mesages
cat /var/log/boot.log
init : /boot/initrd.x(INITial RamDisk)

14. 101.2 Boot the system
weight : 3

15. 101.3 runlevels
weight : 3
0. halt (/etc/rc0.d)
1. Single user mode(recovery)(/etc/rc1.d)
2. Debian/Ubuntu -default(with X11&NFS)(/etc/rc2.d)
3. RedHat/SUSE -text mode(/etc/rc3.d)
4. not used(/etc/rc4.d)
5. RedHat/SUSE - Gui mode(/etc/rc5.d)
6. reboot(/etc/rc6.d)

16. 101.3 runlevels
weight : 3
/etc/init.d : startup services
/etc/inittab : runlevels description file (RedHat)
$ runlevel : checks current runlevel
# init x : change runlevel (x=0..6)

17. O_O : thank you 8-) xD
references :
https://www.lpi.org/linux-certifications/
contact:
mohammed.hannechi@gmail.com