Linux Basic Learning (12) Linux automatic installation system

# #自动安装系统

# # # Kickstart Script

Kickstart script is a script file that automatically answers all problems during the installation of the system

This file enables automatic installation of the system

After the system is installed, it will be generated in the root home directory of the system.

Anaconda-ks.cfg This file is the kickstart script generated by this system as a template

# # #kickstart脚本的制作

The installation of the System-config-kickstart tool in the system can be made graphically kickstart

Yum Install System-config-kickstart-y # #安装图形制作工具

System-config-kickstart # #打开图形ks制作工具

Ksvalidator Ks.cfg # #检测制作的ks脚本语法是否正确

# # #kickstart文件共享

Yum Install Httpd-y

Systemctl Stop Firewalld.service

Systemctl Disable Firewalld.service

Systemctl Start httpd

Systemctl Enable httpd

CP ks.cfg/var/www/html

# # #自动安装命令

Virt-install \

--name LCD \

--ram 800 \

--FILE/VAR/LIB/LIBVIRT/IMAGES/KSTEST.QCOW2 \

--file-size 8 \

--location ftp://172.25.254.250/pub/rhel7.2 \

--extra-args "Ks=http://172.25.254.101/ks.cfg" &

# # #kickstart文件参数解析

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# # #附加pxe网络安装服务

1. corresponding Software Installation
   

Yum Install DHCP Tftp-server syslinux httpd-y

Systemctl Stop Firewalld.service

Systemctl Disable Firewalld.service

Vim/etc/xinetd.d/tftp

Change Disable = yes to disable = no

Systemctl Restart xinetd

Systemctl Start httpd

Systemctl Enable httpd

2. Must download and copy files

cp/usr/share/syslinux/pxelinux.0/var/lib/tftpboot/

isolinux/* the image, copy it from the real machine to the/var/lib/tftpboot/

Mkdir/var/lib/tftpboot/pxelinux.cfg

Cp/var/lib/tftpboot/isolinux.cfg/var/lib/tftpboot/pxelinux.cfg/defult

Configuration of the 3.DHCPD service

Subnet 172.25.88.0 Netwask 255.255.255.0{

Range 172.25.254.200 172.25.254.230

Option routes 172.25.254.250;

FileName "pxelinux.0";

Next-server 172.25.88.101; # #文件存在的主机ip

}

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4. Install the complete system

Vim/var/lib/tftpboot/pexlinux.cfg/default

Menu Default # #默认选中标签

Append initrd=initrd.img

repo=ftp://172.25.254.250/rhel7.2 ks=http://172.25.254.101/ks.cfg

# # #用户权限列表

1. Permission List Definition

Make a special user record table with special permissions to a file

2. Recognition of permission lists

-rw-rw-r--+ 1 root root (OTC) 21:20 file # #权限位有加号代表权限列表开启

-rw-r--r--. 1 root root 0 OTC 21:22 Westos # #权限位是. The delegate permission list is not activated

3. View of the Permissions list

Getfacl file

# file:file # #文件名称

# owner:root # #文件所有人

# group:root # #文件所有组

user::rw-# #文件所有人权限

user:test:rw-# #特殊指定用户权限

group::r--# #组权限

mask::rw-# #权限阀值

other::r--# #其他人权限

Examples:

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# # #4. How to set ACL list

Setfacl-m u:username: Permissions filename

setfacl-m u:test:rw File # #指定test用户对file可读写

Setfacl-x u:student File # #删除列表中的student用户信息

Setfacl-x g:student File # #删除列表中的student用户组信息

Setfacl-b File # #关闭列表

5.mask permission Threshold

If you perform chmod on a file with a permission list, it is likely that the mask in this permission list will be modified

Mask is the maximum permission value that a particular user can get

Setfacl-m m: Permissions # #修改该mask的值

6. Default Permissions

When we need to create a new file or directory in the specified directory that has special permissions for the specified user

Setfacl-m d:u:username: Permissions filename

Default permissions do not take effect on existing files

Default permissions do not take effect on the directory itself, sub-directories, child files

Linux Basic Learning (12) Linux automatic installation system