Run Level

/etc/rc.d/rc.sysinit
/etc/sysctl.conf

/etc/rc.d/rcX.d/*

rcX.d/*目錄
Sxx表示執行
Kxx表示不執行
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Boot Sequence

1. Bios決定開機的device(cdrom, hdd, usb hdd...,etc)
. bootloader
2. MBR : /boot/grub/grub.conf
. 開機分割區, 載入Kernel
3. Kernel
. 偵測H.W(電子訊號)
. 驅動
4. init
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Unit1
Lab

1. create server1.repo

/etc/yum.repos.d/server1.repo
---略---

2. yum update kernel-PAE

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Repositories
-----------------------------

1. file in /etc/yum.repos.d/*.repo

2. server1.repo

[Server1]
name=Red Hat Enterprise Linux 5Server - Server1
baseurl=ftp://192.168.0.254/pub/RHEL5/Server
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yum: installation and removal

1. #yum install [package] ----安裝套件, 如果己經安裝, 就不會再安裝

2. #yum groupinstall [packagegroup]

3, #yum remove [package]

4, #yum update [package] ----舊版會被移除, 安裝新的版本

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