添加了升级内核的步骤update_kernel.md

修改：     README.md
	新文件：   update_kernel.md

Signed-off-by: lcliang <lcliang@linx-info.com>

update_kernel.md

@@ -0,0 +1,147 @@
+# 做盘步骤 #
+
+## 所准备的工具和镜像： ##
+  mkiso-4.2  
+  rocky4.2.32-sqlproxy-2017-06-09.iso  
+  rocky6.0.42.41-x86_64-security-20170815.iso  
+
+## 修改光盘环境 ##
+
+> 在root用户下进行操作
+
+1. 挂载rocky4.2.32-sqlproxy-2017-06-09.iso  
+
+  命令：  
+
+```
+	mount rocky4.2.32-sqlproxy-2017-06-09.iso /mnt -oloop  
+
+```
+
+2. 将/mnt 下的所有文件复制到电脑的cd目录里  
+
+  命令：
+
+```
+	cp /mnt/. /home/lcliang/cd -R  
+
+```
+
+3. 挂载rocky6.0.42.41-x86_64-security-20170815.iso  
+
+  命令：
+
+```
+	mount rocky6.0.42.41-x86_64-security-20170815.iso /home/lcliang/ce -oloop  
+
+```
+
+4. 把所要升级的内核修改文件复制到对应的目录下  
+
+>   所需要修改的文件(lib/modules,boot/isolinux)
+
+  命令：
+
+```
+
+   rm /home/lcliang/cd/lib/modules -r  
+
+   cp /home/lcliang/ce/lib/modules /home/lcliang/cd/lib/ -R  
+
+   rm /home/lcliang/cd/boot/isolinux/initrd.img-2.6.32.41-Rocky4.2-x86_64
+
+   cp /home/lcliang/ce/boot/isolinux/initrd.img-2.6.32.41-Rocky4.2-x86_64 /home/lcliang/cd/boot/isolinux/  
+
+   rm /home/lcliang/ce/boot/isolinux/vmlinuz-2.6.32.41-Rocky4.2-x86_64
+   
+   cp /home/lcliang/ce/boot/isolinux/vmlinuz-2.6.32.41-Rocky4.2-x86_64 /home/lcliang/cd/boot/isolinux/  
+
+```
+
+> 注意：要使修改的光盘的文件名称与之相对应。
+
+
+## 修改光盘环境目录中的Rocky里的modules和kernel的的相关文件（相当于修改安装后的系统的内核和驱动模块） ##
+
+1. 在虚拟机安装rocky6.0.42.41-x86_64-security-20170815.iso系统
+
+2. 将所要升级的内核修改文件复制到对应的目录下(以下的scp命令都是个在6.0.42.41系统中执行)
+
+> 所需要修改的文件（Rocky/modules,Rocky/kernel）
+
+  命令：  
+
+```
+
+   rm /home/lcliang/cd/Rocky/modules -r
+
+   scp -r /lib/modules/* lcliang@172.16.0.67:/home/lcliang/cd/Rocky/modules  
+
+   rm build source 删除cd/Rocky/modules/2.6.32.41-Rocky4.2-x86_64目录下的build source  
+
+   rm /home/lcliang/cd/Rocky/kernels/initrd.img-2.6.32.41-Rocky4.2-x86_64
+
+   scp /boot/initrd.img-2.6.32.41-Rocky4.2-x86_64 lcliang@172.16.0.67:/home/lcliang/cd/Rocky/kernels  
+
+   rm /home/lcliang/cd/Rocky/kernels/vmlinuz-2.6.32.41-Rocky4.2-x86_64
+
+   scp /boot/vmlinuz-2.6.32.41-Rocky4.2-x86_64 lcliang@172.16.0.67:/home/lcliang/cd/Rocky/kernels
+
+   rm /home/lcliang/cd/Rocky/kernels/config-2.6.32.41-Rocky4.2-x86_64
+
+   scp /boot/config-2.6.32.41-Rocky4.2-x86_64 lcliang@172.16.0.67:/home/lcliang/cd/Rocky/kernels  
+
+   rm /home/lcliang/cd/Rocky/kernels/System.map-2.6.32.41-Rocky4.2-x86_64
+
+   scp /boot/System.map-2.6.32.41-Rocky4.2-x86_64 lcliang@172.16.0.67:/home/lcliang/cd/Rocky/kernels  
+
+   rm /home/lcliang/cd/Rocky/kernels/kernel_src_info
+
+   scp /boot/kernel_src_info lcliang@172.16.0.67:/home/lcliang/cd/Rocky/kernels
+
+```
+
+## 更改版本 ##
+
+> 进入到cd目录下
+
+1. vi tag 更改在cd目录下tag  
+
+2. vi etc/issue 更改在cd/etc目录下issue  
+   
+3. vi usr/lib/setup/issue 更改在cd/usr/lib/setup/目录下issue
+
+
+## 生成镜像文件 ##
+
+1. 使用mk_iso_4.2.sh脚本根据目录生成镜像文件  
+
+   修改xorriso的权限，命令：
+   
+   
+```
+   chmod +x xorriso  
+
+```
+
+   移动xorriso到/opt/下，命令
+   
+
+```
+   cp xorriso /opt/  
+
+```
+   
+   生成镜像文件
+   
+```
+   mk_iso_4.2.sh /home/lcliang/cd/ rocky4.2.32-sqlproxy-2017-08-25.iso  
+```
+
+>如果缺少依赖文件可使用apt-file工具来查找  
+apt-get install apt-file  
+apt-file update  
+apt-file search XXX文件  查找文件属于那个包  
+apt-get install 安装包    
+apt-file list 安装包  
+根据要求修改mk_iso_4.2.sh