What does root mean?

In Ubuntu systems, the root user is usually disabled. To activate the root user, you can use the passwd command to set a password and then use the su- command to log in as root. The root user is a user with unrestricted system administrative rights. He has permissions to access and modify files, user management, software installation and removal, and system configuration changes. There are obvious differences between the root user and ordinary users. The root user has the highest authority and broader control rights in the system. The root user can execute important system commands and edit system files, which ordinary users cannot do. In this guide, I'll explore the Ubuntu root user, how to log in as root, and how it differs from a normal user. Notice

0x01 Background of the article Recently, the storage of a business system of the author's company is approaching the limit, and the server will soon be unable to run. Because the business system A contains multiple subsystems A1, A2, A3... An, the middle of these subsystems Due to design reasons, the stored files are all stored in the same parent directory. The only difference is that the names of files and folders generated by different subsystems all start with the name of the subsystem. For example, the files generated by the A1 subsystem are all named A1xxxxxx​, and the file names generated by the A2 subsystem are all A2xxxxx. Now we need to delete the historical files of some of these subsystems to free up server space. Dozens of terabytes of data are stored together. Manual deletion will definitely not show up. We can only use program automation.

Both root and alias can be defined in the location module, and are used to specify the real path of the requested resource, for example: location/i/{root/data/w3;} requests http://foofish.net/i/top.gif When this address is used, the corresponding real resource in the server is the /data/w3/i/top.gif file. Note: The real path is the value specified by root plus the value specified by location. And alias is just like its name. The path specified by alias is the alias of location. No matter how the value of location is written, the real path of the resource is the path specified by alias, such as

1. Taking CentOS as an example, after logging in, modify /etc/passwd and /etc/shadow, change the root starting on the first line to a new user name (such as admin), and save through wq! after modification. 2. After modifying and saving, it will take effect after restarting the server. You can check the permissions of the file and see that the account column has changed to admin, as follows: Note: The default user with the highest administrative authority in Linux is root, uid is 0. Only uid is recognized in the system, so as long as uid is 0, the system is regarded as the highest administrative user. However, there may be certain problems with applications. Some software uses the root user by default, so if you have limited understanding of software applications,

The benefits of rooting your phone: 1. You can back up the system; 2. You can use advanced programs; 3. You can modify and delete system programs; 4. You can install programs on the SD card; 5. You can modify system fonts, etc. Disadvantages: 1. After the mobile phone is rooted, it is easy to be invaded by Trojan viruses; 2. System damage may occur due to incompleteness and software compatibility issues; 3. After the mobile phone is rooted, the software mistakenly deletes system files, causing system errors; 4. There is a risk that user privacy will be leaked after rooting the phone, etc.

For some shared machines, we may not have root permissions, so it will be a little troublesome to install the program. In fact, as long as the relevant files are placed in their own directories, the root permission restrictions can be waived. I installed libevent without root permissions. Just specify the installation path to my /home directory through prefix: ./configure--prefix=/home/****/libevent--enable-sharedmakemakeinstallmakeverify#libevent test, others The installation may not be available.

Step 1: First log in to MySQL and enter the following command in the terminal to enter the MySQL console: sudomysql If you are prompted for a password after entering this command, please enter the password of your root user. Step 2: Change the password. After we enter the MySQL console, we can start to change the password of the root user. Set the password as follows: ALTERUSER'root'@'localhost'IDENTIFIEDWITHmysql_native_passwordBY'new_password&am

The current mobile phone is not rooted, which means that the operating system of the mobile phone has not obtained super user permissions. In the Android system, root permission is the highest permission, which allows users to make in-depth modifications to the system and access sensitive system files. The phone is still in the default state. status, no system permissions have been modified, which means that users cannot directly access and modify system files, and cannot perform some advanced system operations. Ordinary users using unrooted mobile phones can use the basic functions of the mobile phone and install applications normally. There will be restrictions in certain special scenarios.