Scenario 294: Firewall Service Not Running Issue: The firewall service is not running, leading to insecure network access. Troubleshooting Steps: Check the status of the firewall service: systemctl status firewalld If the firewall service is not running, start it: systemctl start firewalld Enable the firewall service to start automatically on boot: systemctl enable firewalld Scenario … Read more
Click the blue “Most Programmer” to follow me! Add a “star” to get daily tech learning at 18:03 Shell is the core weapon of the Linux system, but many people only know the basic commands likels、cd、rm and nothing more. The following advanced tricks will help you say goodbye to being a “Shell novice” and boost … Read more
Shake Network Technology NewsClick on the right to follow for the latest technology news!In the open-source community, Linus Torvalds’ outbursts always seem to trigger a wave of “mini earthquakes”. Recently, this father of Linux has once again fired back — this time, targeting a long-standing issue in filesystem development: case insensitivity (i.e., not distinguishing between … Read more
Column · Supply Chain Security In the digital age, software is ubiquitous. Software acts as a “virtual person” in society and has become one of the fundamental elements supporting the normal operation of society. The security of software is becoming a fundamental and foundational issue in today’s society. With the rapid development of the software … Read more
Author | Xu Xuanjuan“Even if you can provide evidence that those patches are effective, why are we actually wasting time doing extra work?” Linus Torvalds must be furious. Recently, Greg Kroah-Hartman, the maintainer of the Linux kernel stable branch, blacklisted the University of Minnesota (UMN), prohibiting it from submitting patches to the mainline Linux kernel. … Read more
1. System-Level Hardening 1. Dynamic Firewall Configuration Firewall Configuration: Use firewall tools such as iptables or firewalld to strictly limit access to the model server. For example, only open specific ports required for model services and allow access only from trusted IP addresses or network segments. Example command: Allow a specific IP (e.g., 192.168.1.100) to … Read more
Installation of the Plugin Program on PostgreSQL Server in Debian Linux Execute the following command on the PostgreSQL database server running Debian system to install the plugin pldebugger: sudo apt install postgresql-15-pldebugger # After running this command, it seems that the pgsql service automatically restarted. According to the logs, it appears that there is no … Read more
There are many search tools in Linux, and today we will mainly discuss two tools: locate and find. 01 Locate 1. Performance Overview Queries the pre-built file index database on the system /var/lib/mlocate/mlocate.db Note: If this file is deleted, locate will not work. The database must be manually updated (updatedb), or the system must be … Read more
链接：https://blog.csdn.net/2401_84578953/article/details/144244011? ☞The course by Liang Xu has completely exploded!☜ Everyone thinks that Linux is secure by default, and I generally agree (this is a controversial topic). Linux does indeed have a built-in security model. You need to enable it and customize it to achieve a more secure system. Linux is harder to manage, but correspondingly … Read more
If your server’s memory usage is too high, causing slow performance or crashes, you can try the following Linux command to quickly free up cached memory: # This parameter can be used to instruct the kernel to actively free memory caches, but it will not affect running programs. sync; echo 3 > /proc/sys/vm/drop_caches Command Explanation … Read more