Introduction In Linux systems, not all operations can be performed by regular users. Some critical operations (such as installing software, modifying system configurations, and managing services) require superuser (root) privileges. However, operating directly as root is highly risky; a single mistake can lead to system failure. Therefore, Linux provides a safer solution—sudo. With the <span>sudo</span> … Read more
LinuxError: Solution for ‘is not in the sudoers file’ Today, while trying to install software as a regular user, I encountered a rather interesting error indicating that the user is not in the sudoers file. Error: Debian is not in the sudoers file. This incident will be reported.. This is simply because the user has … Read more
0x00 Introduction The Linux system is anopen-source Unix-like operating system kernel,which, due to its powerful customizability and stability, has been widely used in various fields such as servers, mobile devices, and IoT devices. Throughout its development, the Linux system has attracted developers from around the world, forming a strong community. It is licensed under the … Read more
Privilege escalation in Linux systems refers to the process of elevating from a low-privilege user (such as a regular user or www-data) to a high-privilege user (such as root). This is very common in penetration testing (Pentest) or security research, but please note: it should only be used in legally authorized environments, and misuse may … Read more
Introduction Recently, my hard drive failed, and I spent a lot of time recovering and organizing data, resulting in very low productivity. 🤣 My hard drive broke down The hard drive suddenly failed, and it took me half a month to recover the data… (including data recovery tools) As for the promised new website, it … Read more
1. What is sudo <span>sudo</span> (superuser do) is a tool used in Linux/Unix systems to execute commands as a superuser (root) or another specified user. Ordinary users can gain temporary administrative privileges through <span>sudo</span>, avoiding the need to use the root account directly. Using <span>sudo</span> enhances system security and reduces the risk of accidental operations. … Read more
🚶🚶Every step counts. 0x01 Introduction <span>sudo chroot</span> is a powerful command combination in Linux systems that allows switching to a specified directory with superuser privileges and running commands or starting sessions with that directory as the new root directory. <span>sudo</span> is used to obtain administrative privileges, while <span>chroot</span> (change root) sets the specified directory as … Read more
In practical work, it is generally not recommended to operate servers directly as the root user. However, sometimes due to special requirements, such as installing certain software, root access is necessary. In this article, we will introduce several commonly used commands for switching users, which beginners need to understand in terms of their usage and … Read more
Click the blue “Most Coders” to follow me! Add a “star“, every day at 18:03, let’s learn technology together Source: IT Home Technology media borncity reported yesterday (July 1) that a serious vulnerability exists in the sudo command in Linux, which can be exploited by attackers to escalate privileges to root level. According to the … Read more
1. Account Security Control 1. Basic Measures 1) System Account Cleanup Set the shell of non-login users to /sbin/nologin Lock accounts that have not been used for a long time Delete unnecessary accounts Lock account files passwd, shadow 2) Password Security Control Set password expiration: chage -M 30 username Require users to change their password … Read more