SquashFS 修改 install.img

1. 從下載的光碟中取得

   [root@dyH ~]# mkdir tmp
   [root@dyH ~]# cd tmp
   [root@dyH tmp]# cp /var/ftp/pub/centos6/images/install.img .
   [root@dyH tmp]# ll install.img
   -rw-r--r--. 1 root root 118886400 Aug  1 08:35 install.img
   

2. SquashFS 檔案系統，可以不浪費任何一個位元，儲存檔案內容。Linux 安裝映像檔 install.img 就是此格式。
3. 安裝 squashfs 工具套件

   [root@dyH tmp]# yum install squashfs-tools
   

4. 解開 install.img

   [root@dyH tmp]# unsquashfs install.img 
   Parallel unsquashfs: Using 4 processors
   14011 inodes (15923 blocks) to write
   
   [===========================================================-] 15923/15923 100%
   created 9226 files
   created 749 directories
   created 4783 symlinks
   created 0 devices
   created 0 fifos
   

5. 查看檔案

   [root@dyH tmp]# ll
   total 163052
   -rw-r--r--.  1 root root 118886400 Aug  1 08:35 install.img
   drwxr-xr-x. 11 root root      4096 Aug 25  2012 squashfs-root
   

6. 安裝背景圖片存放位置

   [root@dyH tmp]# cd squashfs-root/
   [root@dyH squashfs-root]# ll usr/share/anaconda/pixmaps/s*.png
   -r--r--r--. 3 root root 213694 Aug 24  2012 usr/share/anaconda/pixmaps/splash.png
   -r--r--r--. 1 root root 288727 Aug 24  2012 usr/share/anaconda/pixmaps/syslinux-splash.png
   

7. 取代安裝過程預設背景圖片

   [root@dyH squashfs-root]# cp /home/dywang/Pictures/dywang6_640x300.png \
   	usr/share/anaconda/pixmaps/syslinux-splash.png
   [root@dyH squashfs-root]# cp /home/dywang/Pictures/dywang6_640x240.png \
   	usr/share/anaconda/pixmaps/splash.png
   [root@dyH squashfs-root]# cd usr/share/anaconda/pixmaps
   [root@dyH squashfs-root]# ln -f splash.png progress_first.png
   [root@dyH squashfs-root]# ln -f splash.png progress_first-lowres.png
   

8. 修改安裝過程預設主題樣式

   [root@dyH squashfs-root]# sed -i 's/Slider/Clearlooks/g' \
   etc/gconf/schemas/metacity.schemas \
   etc/gconf/gconf.xml.defaults/%gconf-tree.xml \
   etc/gtk-2.0/gtkrc
   [root@dyH squashfs-root]# cp -a /usr/share/themes/Clearlooks usr/share/themes/
   

9. 重新製作 squashfs 檔案系統的 install.img

   [root@dyH squashfs-root]# cd ..
   [root@dyH tmp]# rm install.img 
   rm: remove regular file `install.img'? y
   [root@dyH tmp]# mksquashfs squashfs-root install.img
   Parallel mksquashfs: Using 4 processors
   Creating 4.0 filesystem on install.img, block size 131072.
   [===========================================================-] 11140/11140 100%
   Exportable Squashfs 4.0 filesystem, gzip compressed, data block size 131072
   	compressed data, compressed metadata, compressed fragments, compressed x
   
   ............
   [root@dyH tmp]# ll
   total 163052
   -rw-r--r--.  1 root root 118886400 Aug  1 09:06 install.img
   drwxr-xr-x. 11 root root      4096 Aug 25  2012 squashfs-root