Introduction Although most of my work is related to Java development, I interact with the Linux system daily, especially after using a Mac, where I work in a command-line environment with a black background. My memory isn’t great, and I often forget many useful Linux commands, so I am gradually summarizing them for future reference. … Read more
Experiencing Disk I/O Lag on Linux? Step-by-Step Guide to Identify the Culprit Process! Have you ever encountered a situation while using Linux where the disk suddenly becomes sluggish, the system response is delayed, and even entering commands takes forever? It is very likely that a certain process is excessively reading and writing to the disk, … Read more
w- Displays the currently logged-in user information in the system. ab- Apache server performance testing tool. ld- Links object files to create an executable program. xz- A tool for POSIX platform development with high compression rates. ln- Used to create links for files. ar- Creates or modifies archive files, or extracts from archive files. fg- … Read more
Click the blue text to follow us This article summarizes super practical Linux commands, absolutely packed with useful information. cd command 1. Syntax cd [target path] The target path can be an absolute path or a relative path. 2. Function Switch the current working directory to the specified directory. 3. Common Usage cd .. Switch … Read more
Under the black curtain of the terminal, Shell commands and Linux commands are like twin flames, intertwined yet distinctly characterized. Beginners often confuse the two, but in reality, they are mirror projections of ‘environment’ and ‘system’. 1. Definition Distinction: Interpreter vs Kernel Shell commands: Instructions executed through a Shell interpreter (such as Bash/Zsh), essentially serving … Read more
1. Difference Between Commands and Command Lines 1. Command Line: The Linux terminal (Terminal), a command prompt page, operates the system in pure “character” form, allowing various character-based commands to issue operational instructions to the system. 2. Command: A Linux program, where a command is essentially a program. Commands do not have a graphical interface … Read more
Network security is the cornerstone of operations and maintenance, and mastering iptables and firewalld is an essential skill for every Linux administrator. This article will take you deep into the core principles and practical techniques of these two major firewall tools! 1. Introduction to iptables iptables is a command-line tool for managing firewall rules in … Read more
1. Basic Commands uname -m # Display the machine's processor architecture uname -r # Display the currently used kernel version dmidecode -q # Display hardware system components (SMBIOS / DMI) hdparm -i /dev/hda # List a disk's architectural features hdparm -tT /dev/sda # Perform a test read operation on the disk arch # Display the … Read more
1. Delete expired files in Linux find /u01/dsg/supersync/s01/ds/xdt/ -type f -name “*.xdt” -mtime +3 -delete 2. Delete expired files and log the deletions find /u01/dsg/supersync/s01/ds/xdt/ -name “*.xdt” -mtime +3 -printf “Deleting %p\n” -delete | tee deletion.log 3. Step-by-step logging service nginx start 1> /var/log/nginx/start.log 2> /var/log/nginx/start_errors.log Normal logs are recorded in start.log, and error logs … Read more
This article compiles the top 50 questions frequently encountered in Linux system operation and maintenance interviews. Whether you are a beginner entering the IT industry or an experienced operations personnel aiming for promotion, these questions will provide you with comprehensive knowledge review and practical simulation, helping you stand out in interviews, successfully secure your desired … Read more