boot

Google Compute Engine VM instance: VFS: Unable to mount root fs on unknown-block

有些话、适合烂在心里 提交于 2019-12-12 08:57:14
问题 My instance on Google Compute Engine is not booting up due to having some boot order issues. So, I have created a another instance and re-configured my machine. My questions: How can I handle these issues when I host some websites? How can I recover my data from old disk? logs [ 0.348577] Key type trusted registered [ 0.349232] Key type encrypted registered [ 0.349769] AppArmor: AppArmor sha1 policy hashing enabled [ 0.350351] ima: No TPM chip found, activating TPM-bypass! [ 0.351070] evm:

第一个spring boot应用程序

半世苍凉 提交于 2019-12-12 06:10:31
在虚拟机上已经配置好tomcat MySQL容器,用sqllog连接MySQL,导入项目的sql文件,在IDEA上进行spring boot的演示。 创建一个Controller来演示Spring Boot package com . funtl . hello . spring . boot . controller ; import org . springframework . web . bind . annotation . GetMapping ; import org . springframework . web . bind . annotation . RestController ; @RestController public class HelloController { @GetMapping ( value = "/" ) public String hello ( ) { return "Hello Spring Boot." ; } } 启动 HelloSpringBootApplication 的main方法 浏览器访问 http://localhost:8080 即可得到返回内容 来源: CSDN 作者: 爱爱爱爱五月天 链接: https://blog.csdn.net/qq_43072699/article/details

Marshmallow Intent.ACTION_BOOT_COMPLETED

前提是你 提交于 2019-12-12 03:28:49
问题 i have a rotted Nexus6 With Android6 . I've created a system app (located in system/app ) i wish to execute a simple code when receiving ACTION_BOOT_COMPLETED but for some reason the code does not executes.. Manifest: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.atest"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="

Does the first sector (MBR) of a flash drive get executed on insertion into a computer

我们两清 提交于 2019-12-12 02:26:31
问题 Do the first 512 bytes get executed whenever I insert the flash drive into any computer? If yes (which should be the case), then I suppose if I extract and disassemble the MBR and put in a reference that points to a memory location of a stored executable (on the flash drive), even that executable will be executed whenever its plugged in a computer..? How could I do that? I mean, only by doing a simple call <address> won't do it.. I also wanna know more about MBRs of flash drives since they

Error inserting scsi_wait_scan - Invalid module format

人盡茶涼 提交于 2019-12-12 02:14:32
问题 The system is CentOS 6.3. I've compile a new kernel and the resulting rpm installed on a target machine. When booting from the kernel I've receive the error in a title of the question. I've extracted corresponding initramfs and compared output of: modprobe --dump-modversions /path/to/scsi_wait_scan.ko with entries in corresponding /boot/ symvers -*. All symbols checksums fit, including of module_layout . Is there a way to extract symvers from kernel itself? 回答1: I've found the problem. Short

Creating Bootstrapped Means and CI from matrix

依然范特西╮ 提交于 2019-12-12 01:45:22
问题 I have the following matrix (let's call it df), for which I would like to create bootstrapped means and 95% confidence intervals for each column, due to the heavily 0 weighted distribution. I would like the mean and CI's to be added to the bottom of the matrix as new rows. This is a small subset of the data, the true data has >600 rows which will make the bootstrapping much more effective. row.names V183 V184 V185 V186 V187 V188 V189 V190 V191 V192 V193 V194 V195 V196 V197 V198 V199 V200 V201

spring boot 原理解析一(spring boot 基础特征)

早过忘川 提交于 2019-12-11 23:28:39
spring boot 提供了完整的介绍 文档:https://docs.spring.io/spring-boot/docs/2.2.2.RELEASE/reference/html/documentation-overview.html#boot-documentation 核心特征 springApplication 的机制,配置文件,环境文件,日志 web 特征:mvc 分层结构、内置容器 数据:支持结构化数据和非结构化数据 来源: https://www.cnblogs.com/blogxiao/p/12026174.html

Spring boot 配置文件yml无法取值问题

只谈情不闲聊 提交于 2019-12-11 18:37:49
小白初学spring boot在使用自定义yml配置文件的时候发现在javabean中无法将配置信息进行绑定,最初文件命名都很随意找了好久才找到问题 解决办法 在springboot中使用自定义yml配置文件需要在主配置文件(application.yml)中添加以下声明: spring : profiles : active : dev , debug 如果有多个配置文件则用","进行分隔,系统启动将扫描到resources路径下的application.yml,同时可以设置需要激活的配置文件,用于不同的版本(开发,调试,上线等)。 为方面配置文件的书写可以再pom中引入一下插件 < dependency > < groupId > org . springframework . boot < / groupId > < artifactId > spring - boot - configuration - processor < / artifactId > < optional > true < / optional > < / dependency > spring boot配置文件扫描位置和优先级(从高到低): –file : . /config / –file : . / –classpath : / config / –classpath : /

巧用Spring Boot中的Redis

我是研究僧i 提交于 2019-12-11 18:09:27
本篇文章转载自 巧用Spring Boot中的Redis Redis 介绍 Redis 是目前业界使用最广泛的内存数据存储。相比 Memcached,Redis 支持更丰富的数据结构,例如 hashes, lists, sets 等,同时支持数据持久化。除此之外,Redis 还提供一些类数据库的特性,比如事务,HA,主从库。可以说 Redis 兼具了缓存系统和数据库的一些特性,因此有着丰富的应用场景。本文介绍 Redis 在 Spring Boot 中两个典型的应用场景。 如何使用 1、引入依赖包 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> </dependency> Spring Boot 提供了对 Redis 集成的组件包:spring-boot-starter-data-redis,spring-boot-starter-data-redis依赖于spring-data-redis 和

About USB boot from usb

生来就可爱ヽ(ⅴ<●) 提交于 2019-12-11 17:45:52
问题 I want to make ipl and boot os from my usb. I just want to read 360 sectors(512 bytes per sector).I checked code for several times and cannot find some mistakes.I have already debug it on qemu but it always returns "load error"(as in this code, it jumps to error section).It seems lba search did not work and always get carry flag 1 when I do it. my qemu program is like this qemu-system-i386 -usb ipl.bin and ipl.bin is compiled binary file made from assembler code below. ; haribote-ipl ; TAB=4