centos(5) runlevel 错误设定的恢复
之前在Centos(2) 非图形界面里已经介绍了各个runlevel的不同之处, 本文是笔者在/etc/inittab中对runlevel设定错误的基础上如果来恢复。 笔者之前是用的5模式来跑的机器,后来觉得机器的性能不行,所以考虑用3模式来跑, 设定好了如下之后, 重启机器, id:3
之前在Centos(2) 非图形界面 里已经介绍了各个runlevel的不同之处, 本文是笔者在/etc/inittab中对runlevel设定错误的基础上如果来恢复。
笔者之前是用的5模式来跑的机器,后来觉得机器的性能不行,所以考虑用3模式来跑, 设定好了如下之后, 重启机器,
过了一会发现 机器还没有起来, 一看, 是如下的界面:
一开始还没有反应过来,因为是虚拟机,所以又重启了一次, 发现 还是这样。 我就觉得奇怪了。
仔细看了一下,上面的交互过程, 发现是runlevel为0造成的。
赶紧去google, 发现大家都在讲一定不要设定成defaultrunlevel为0或者6,不然机器会死循环,但没有说如果已经是0或者6了,怎么处理。
还是自己想办法吧, 想到之前因为启动grub被破坏,自己修复的过程。 于是想到用这个办法来尝试修复。
首先是在进入系统的启动之前,按“e”,进入edit 模式。
选择kernel那一行, 再按e,
在kernel里设定, runlevel为3 ,回车之后, 再启动系统,
这次会发现 是以3模式来启动的,
顺序的进入系统后, 赶紧的把/etc/inittab中的initdefault值 改成3,
再次重启系统,就没有问题了。

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip
