"Linux Micro Jobs" in week six

Please describe in detail the start-up process of the CentOS system (detailed to what each process system does)

1) power-on self-test, BIOS boot-boot phase, implement hardware initialization and find boot media in the process, Load Boot Manager (GRUB) from MBR and run the boot-boot management; 2) GRUB boot boot stage; load Stage1 load stage1.5 Mount Stage2 reads the/boot/grub.conf file and displays the boot menu, loads the selected kernel and INITRD files into memory 3) kernel phase: Run kernel boot parameters, unzip the initrd file and mount the Initd file system , mount the required drive, mount the root file system 4) INIT user space initialization phase: Start the/sbin/init program, run the Rc.sysinit script, set the system environment, start the swap partition, check and mount the file system, read the/etc/inittab Files, run service initialization scripts at different runlevel defined in/ET/RC.D/RC<#>.D; open character Terminal 1-6 Console/Open graphical display management, set login

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Second, add a new piece of hardware to the CentOS 6 running on the virtual machine, and provide two primary partitions;

(1) Create a new two primary partition for the hard disk, and install grub for it;

(2) Provide kernel and RAMDisk files for the first primary partition of the hard disk, and provide rootfs for the second partition;

(3) for Rootfs to provide bash, LS, cat programs and the library files that depend on;

(4) Provide the configuration file for grub;

(5) The new hard disk is set as the first boot item and can start the target host normally;

[10:45:49 [email protected]_s ~]# fdisk /dev/sdc          #为新硬盘新建两个主分区Device  contains neither a valid dos partition table ,  nor sun, sgi or osf disklabelbuilding a new dos disklabel  with disk identifier 0xb29dae4d. changes will remain in memory only, until you decide to  Write them. After that, of course, the previous content won ' t be recoverable. warning: invalid flag 0x0000 of partition table 4 will be  Corrected by w (rite) warning: dos-compatible mode is deprecated. it ' s  strongly recommended to         switch off  the mode  (command  ' C ')  and change display units to         sectors  (command  ' U '). command  (m for help):  ncommand action   e   extended    p   primary partition  (1-4) ppartition number  (1-4):  1first cylinder  (1-2610, default 1): using default value 1last  cylinder, +cylinders or +size{k,m,g}  (1-2610, default 2610):  +10GCommand   (M FOR HELP): ncommand action   e   extended    p   primary partition  (1-4) ppartition number  (1-4):  2first  cylinder  (1307-2610, default 1307):  using default value 1307last  cylinder, +cylinders or +size{K,M,G}  (1307-2610, default 2610):  using  default value 2610command  (M FOR HELP): wthe partition table has been  altered! Calling ioctl ()  to re-read partition table. Syncing disks. [10:58:53 [email protected]_s ~] #mkfs  -t ext4 /dev/sdc1[10:58:53 [email  protected]_s ~] #mkfs  -t ext4 /dev/sdc2[11:09:31 [email protected]_s ~ ] #mkdir  /mnt/{boot,sysroot}[11:09:33 [email protected]_s ~] #mount  /dev/sdc1 /mnt /boot/[11:10:03 [email protected]_s ~] #mount  /dev/sdc2 /mnt/sysroot/[11:26:36 [ Email protected]_s ~] #cp  /boot/vmlinuz-2.6.32-431.el6.x86_64 /mnt/boot/[11:26:37 [ Email protected]_s ~] #cp  /boot/initramfs-2.6.32-431.el6.x86_64.img /mnt/boot/[11:28:52  [email protected]_S ~]# vim /mnt/boot/grub/grub.conf          #新建一个  grub  ConfigurationFile default=0timeout=15title centos6.5 homemakeroot  (hd0,0) kernel / vmlinuz-2.6.32-431.el6.x86_64 ro root=/dev/sdc2 selinux=0 init=/bin/bashinitrd / Initramfs-2.6.32-431.el6.x86_64.img[11:31:29 [email protected]_s ~] #mkdir  -p /mnt/ Rootfs/{bin,lib64}[11:31:30 [email protected]_s ~] #cp  -r /bin/{bash,ls,cat} /mnt /rootfs/bin/         #复制bash, Ls,cat, dependent library files          [11:31:36 [email protected]_s ~] #cp  $ (ldd /bin/bash |  awk  ' $3~/^\/lib64/{print $3} ')  /mnt/rootfs/lib64/#[11:31:42 [email protected]_s  ~] #cp  $ (ldd /bin/ls | awk  ' $3~/^\/lib64/{print $3} ')  /mnt/rootfs/ Lib64/[11:31:54 [email protected]_s ~] #cp  $ (ldd /bin/cat | awk  ' $3~/^\ /LIB64/{PRINT $3} ')  /mnt/rootfs/lib64/restart server settingBooting from SDC into the system 

Third, make a kickstart file and a boot image. Describe its process.

[16:27:10 [email protected]_s ~] #cat  myks.cfg # Kickstart file  Automatically generated by anaconda. #version =DEVELINSTALLCDROMLANG ZH_CN. utf-8keyboard usnetwork --onboot no --device eth0 --bootproto dhcp -- noipv6rootpw  --iscrypted $6$we6z2youllzqleqq$97ev7j9sgwmi0p5hrj79nccpgypxqiqxsixn69puisja/ bmny92sfl7qobf2w4ies79nm.c0ii5acdvqwocft/firewall --service=sshauthconfig --enableshadow -- Passalgo=sha512selinux --enforcingtimezone --utc asia/shanghaibootloader --location=mbr  --driveorder=sda --append= "Crashkernel=auto rhgb quiet" # the following is  the partition information you requested# Note that any  Partitions you deleted are not expressed# here so unless you  clear all partitions first, this&nbSp;is# not guaranteed to work#clearpart --none#part /boot --fstype=ext4  --size=200#part swap --size=8192#part / --fstype=ext4 --grow --size= 200repo --name= "CentOS"   --baseurl=cdrom:sr0 --cost=100% packages@base@chinese-support@core@debugging@development@directory-client@java-platform@network-file-system-client@print- Client@server-platform@server-policy@workstation-policypaxoddjobsgpiodevice-mapper-persistent-datasystemtap-clientjpackag E-utilssamba-winbindcertmongerpam_krb5krb5-workstation[16:32:50 [email protected]_s ~] #mkdir  -p /data/iso/isolinux        [16:34:41 [email  Protected]_s ~] #cp  /media/isolinux/* /data/iso/isolinux/  [16:35:13 [email  Protected]_s ~] #cp  /root/anaconda-ks.cfg /data/iso/isolinux/myks.cfg         [16:36:47 [eMail protected]_s ~] #mkisofs  -r -j -t -v –no-emul-boot –boot-load-size  4 –boot-info-table -V  "Centos 6.8 x86_64 boot"  -b /data/iso/ isolinux/isolinux.bin -c /data/iso/isolinux/boot.cat -o /root/boot.iso myiso          #创建引导镜像

"Linux Micro Jobs" in week six