1.功能作用

在debconf database中插入默认值

2.位置

/usr/bin/debconf-set-selections

3.格式用法

debconf-set-selections [-vcu] [file]

4.主要参数

1

2

3

-v,--verbose显示运行过程信息

-c,--checkonly只检查输入文件的格式

-u,--unseen在预置参数时，不设置‘seen‘标识

5.应用实例

1、命令行输入设置参数

sudo debconf-set-selections <<< ‘mysql-server-5.5 mysql-server/root_password password your_password‘

sudo debconf-set-selections <<< ‘mysql-server-5.5 mysql-server/root_password_again password your_password‘

sudo apt-get -y install mysql-server

2、先输入文件，再一次性添入设置参数

echo "mysql-server-5.5 mysql-server/root_password password $MYSQL_ROOT_PASS" > /tmp/mysql.preseed

echo "mysql-server-5.5 mysql-server/root_password_again password $MYSQL_ROOT_PASS" >> /tmp/mysql.preseed

cat /tmp/mysql.preseed | sudo debconf-set-selections

rm /tmp/mysql.preseed

sudo apt-get install -y mysql-server

3、使用echo方式输入设置参数

echo ‘mysql-server-5.5 mysql-server/root_password password your_password‘ | sudo debconf-set-selections

echo ‘mysql-server-5.5 mysql-server/root_password_again password your_password‘ | sudo debconf-set-selections

sudo apt-get install -y mysql-server

4、直接从文件中读取设置参数

sudo debconf-set-selections mysql-passwd

sudo apt-get install -y mysql-server

5.docker 中静默安装mysql