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Ubuntu 开机出现 grub rescue 的模式下修复

我们两清 提交于 2021-02-08 05:25:11
由于在Windows下面对分区修改,导致grub所在分区由sda3变成了sda2了,这样一来找不到grub了,Ubuntu开机就出现了 grub rescue > 在此情况下,可以如下解决,并不用重新安装系统 第一步,找出你的Linux盘在那个分区以及grub目录在什么位置。 如果你还记得最好,忘了也无所谓,使用下面命令逐个试探即可: grub rescue>ls 回车后,ls命令会列出所有磁盘分区信息,如: (hd0,4),(hd0,7),(hd0,8),(hd0,9) 循环使用如下命令,直至显示该分区所包含文件内容而不是unknown filesystem以及其他一些不正常信息 grub rescue>ls (hd0,0)/boot/grub (网上有写ls (hd0,0)/grub的,可能根据不同linux发行版本不同吧,Ubuntu 10.04是grub是放在/boot下面的。或者可以ls其他文件也一样) 假设我们试到(hd0,8)时,成功显示了文件内容,则表示。 第二步: grub rescue>set root=(hd0,8) //括号里分区为上一步尝试成功的分区,即linux grub 所在分区 grub rescue>set prefix=(hd0,8)/boot/grub 第三步: grub rescue>insmod normal.mod 网上有些insmod

tomcat异常问题

牧云@^-^@ 提交于 2020-02-08 12:05:14
在清理c盘之后,tomcat突然坏掉 二月 08, 2020 9:22:08 上午 org.apache.catalina.core.ContainerBase startInternal 严重: 子容器启动失败 java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: 子容器启动失败 at java.util.concurrent.FutureTask.report(Unknown Source) at java.util.concurrent.FutureTask.get(Unknown Source) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:916) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.core.StandardService.startInternal

Java 游戏报错 看不懂求教

拜拜、爱过 提交于 2020-01-09 23:56:05
Java 飞机小游戏 报错 看不懂求救 at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$500(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue3.run(UnknownSource)atjava.security.AccessController.doPrivileged(NativeMethod)atjava.security.ProtectionDomain 3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain3.run(UnknownSource)atjava.security.AccessController.doPrivileged(NativeMethod)atjava.security

pytest 运行用例报错:unknown hook 'pytest_namespace' in plugin <module 'allure.pytest_plugin'

点点圈 提交于 2020-01-08 11:06:48
以pytest方式运行用例,报错:pluggy.manager.PluginValidationError: unknown hook 'pytest_namespace' in plugin <module 'allure.pytest_plugin' from 'D:\\python3.7.1\\lib\\site-packages\\allure\\pytest_plugin.py'> 网上说是pytest版本过高了 环境中pytest是5.3.1的,卸载重新安装pytest==4.0.2,可以正常运行 来源: https://www.cnblogs.com/xioawu-blog/p/12038274.html

关于jdbc.exceptions.jdbc4.MySQLSyntaxErrorExcepti...

感情迁移 提交于 2020-01-07 14:18:39
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 郁闷!在插入mysql语句时出错居然弄了我半天,在网上也搜索了N次,也徒劳无功。。。。。 没办法,只有去mysql里执行 INSERT INTO book_list (name) VALUES (‘f') 。可以!! 再在程序里面尝试 “ INSERT INTO book_list (name) VALUES (‘f')” 。可以!! 那么与我的写法有什么不同呢? Book book=new Book(" www.pxsy.net “); “ INSERT INTO book_list (name) VALUES (”+ book.getName()+" )” 抛出 jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'm' in 'field list'异常 对比发现 “ INSERT INTO book_list (name) VALUES (‘f')” 插入值多了 '' 引号。。。 改写为: Book book=new Book(" 飘香书院 “); “ INSERT INTO book_list (name) VALUES ( ' ”+ book.getName()+"' )” 哈哈哈哈!!!1笑死我。。。成功!!!!! 来源:

疑难杂症:java.lang.AbstractMethodError: org.apache.xerces.dom.DocumentImpl.setXmlVersion(Ljava/lang/String;)V

风格不统一 提交于 2019-12-25 23:12:07
错误: java.lang.AbstractMethodError: org.apache.xerces.dom.DocumentImpl.setXmlVersion(Ljava/lang/String;)V at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.setDocumentInfo(Unknown Source) at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.startElement(Unknown Source) at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.closeStartTag(Unknown Source) at com.sun.org.apache.xml.internal.serializer.ToSAXHandler.flushPending(Unknown Source) at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.startElement(Unknown Source) at com.sun.org.apache.xalan.internal.xsltc.trax

ERROR 1054(42S22) Unknown column 'password' in ‘field list’

谁都会走 提交于 2019-12-13 20:11:47
本意向修改一个用户的密码,网上搜到的命令为如下 1 mysql> update user set password=password(“新密码”) where user=”用户名”; 执行后报错  ERROR 1054(42S22) Unknown column 'password' in ‘field list’ 错误的原因是 5.7版本下的mysql数据库下已经没有password这个字段了,password字段改成了authentication_string 所以请使用一下命令: >mysql -u root -p Enter password: ******** Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 12 Server version: 5.7.18-log MySQL Community Server (GPL) Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names

获取真实ip地址

喜夏-厌秋 提交于 2019-12-10 02:29:48
获取真实ip地址的java代码如下: /** * 获取 真实的IP * */ public static String getIp(HttpServletRequest request) { String ip = request.getHeader("X-Forwarded-For"); if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("Proxy-Client-IP"); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("WL-Proxy-Client-IP"); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("HTTP_CLIENT_IP"); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("HTTP