1. Basics 2. Help Commands 3. File and Directory Management (Part 1) 4. File and Directory Management (Part 2) 5. Permission Management 6. Vim Text Editor 7. File System and File Search 8. System Management 9. Disk Partitioning, Logical Volumes, and Boot Repair 10. Understanding BASH in Shell 11. Basic Shell Commands 12. Text Operations
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
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
In Linux, the cp command by default prompts for confirmation before overwriting (due to the system alias alias cp=’cp -i’). Here are several methods to force overwrite without prompting: 1. Bypass the alias using a backslash \cp -rf source_file destination_file The backslash \ ignores the alias and directly calls the native cp command, where -rf … Read more
In the world of Linux, file management is a core task. Whether system administrators are maintaining servers or developers are searching for specific code files, quickly and accurately locating files is crucial. 1. Basic Syntax of the ‘find’ Command The basic syntax of the ‘find’ command is: find [search path] [expression] Search path: Specifies the … Read more
1. less – A Paging Tool to View File Contents Syntax: less filename Description: You can press Enter or Page Up/Page Down to navigate through the pages. To exit when you reach the end of the content, press ‘q’. [root@VM-8-13-centos ~]# less abc hello world hello world abc(END) 2. more – View File Contents by … Read more
Warm Reminder If you like this article, please share it with your friends. If you have any questions or want more information, please follow or leave a message. In Linux systems, managing files and directories is fundamental to daily operations. The <span>ls</span> command, as a common tool for listing the contents of files and directories, … Read more
The C language is a powerful programming language widely used in the development of operating systems and embedded systems. It can interact directly with hardware and access low-level operating system functions through system calls. In this article, we will introduce what system calls are and how to use them in C to implement some basic … Read more
In Linux systems, absolute paths and relative paths are core concepts for locating files and directories, with significant differences in usage scenarios, syntax, and functionality. Here is a detailed analysis: 1. Definitions and Syntax Absolute Path Definition: Starts with the root directory <span>/</span> and describes the complete path to the target file or directory step … Read more