Automatic installation scripts in Linux

How to make your host automatically complete the installation, automatically answer the questions asked by the system, write the automatic installation script can be implemented, the following will explain in detail the automatic script installation method.

Systemd-config-kickstart # #自动应答脚本制作工具

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Installation is successful and Systemd-config-kickstart will make a script response during the installation process

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Choose a language selection

(1) Basic Configuration installation must be consistent time zone selection (optional, in the script is written, here to do an explanation)

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Root passwd fill in the root password, and confirm that two times to enter the password

Advanced Configuration selection, System version, start after installation, do not open the graphical interface (so that the installation is relatively fast)

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(2) The way we install it is to install the network share, so we need to fill in the IP and service sharing directory of the Open service.

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(3) Select partition partion information

Click the bottom corner Add to customize the Add partition

First row Select drop-down menu/boot partition, size 200M

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Select Add Swap partition, note in the second row to select, size is 500M

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Select the root partition, second row, note that all remaining memory is now given to the root partition

Select Fill all unused space on disk

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(4) Select the network to be used by the installation client, DHCP assign IP to the client's service (if DHCP is not, you need to build it yourself)

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(5) Turn off firewall when powering on

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(6) Do not open the image

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(7) will write the file ks.cfg save, click on the top left filed point open, there is an option save save, you can choose to save the location, in order to find I put it under the root

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(8) Copy the generated file ks.cfg to the shared directory CP ks.cfg/var/www/html (share in the previous article was described in detail)

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File exists

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Ks.cfg configuration file, all the choices just now in the file, you can also directly modify the file to take effect

(1) Just the first step, the time zone we have no choice, here the tenth line can be changed time zone timezone Asia/shanghai

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(2) need to add at the end of the file

%packages lists the packages you want to install (for new installations only)

Lftp download tool, Access file protocol

@base Defining environment variables

%end End

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Add executable permissions to the file

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Ksvalidator ks.cfg See ks.cfg If this file has a syntax error

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Test can be shared after the error

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Write the install Virtual machine script

--lacation http://172.25.254,60/rhel7.2 # #安装中镜像共享172.25.254.60/rhel7.2 in this directory

--extra-args "Ks=http://172.25.254.60/ks.cfg" # #回答安装过程中系统提出的问题, all written in the shared directory, 172.25.254.60/ks.cfg (http=/var/www/ html

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Add executable permissions to the script

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Construction of DHCP

Download DHCP software first

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To view the configuration file, there is an example in the configuration file

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This example can be copied to the configuration file, the corresponding changes can be

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vim/etc/dhcp/dhcp.conf Editing a configuration file

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7 option Domain-name "example.org"; # #域名

8 option Domain-name-server 172.25.254.60; # #dns

Ten Default-lease-time 600;# #默认租约期

Max-lease-time 7200;# #最长租约期

Log-facility local7;# #日志级别

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Delete 27th, line 28

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Delete content after 35 rows

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Subnet 172.25.254.0 netmask 255.255.255.0 {# #网段, subnet mask

Range 172.25.254.200 172.25.254.220;# #地址范围

Option Routers 172.25.254.160;# #网关

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Systemctl Restart DHCPD # #重启dhcp服务

Systemctl Stop FIREWALLD # #关掉火墙

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During installation, you can use the Ctrl alt F2 to view IP, gateway, and DNS

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Non-graphical installation of only 50 packages, relatively fast

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Automatic installation scripts in Linux