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Common storage devices include solid-state disks, SD/MMC cards, and USB thumb drives. Popular file systems are ext4, FAT32, NTFS, JFFS2, and NFS. The Virtual File System (VFS) acts as an abstraction layer for diverse file systems, offering a consistent application programming interface (API). This lets user-space programs interact with any moun ...

The syntax command >file 2>&1 & is a common yet frequently misunderstood shell construct. It performs three distinct operations in one line: output redirection, error stream merging, and background execution. File Descriptors and Stream Behavior Every process in Linux starts with three default file descriptors: 0 (stdin): Input s ...

Inspecting Process Memory Usage Using top PID – Process ID USER – Owner PR – Priority (lower = higher) NI – Nice value VIRT – Virtual memory RES – Physical memory SHR – Shared memory S – State (S=sleep, R=run, Z=zombie, N=negative nice) %CPU – CPU usage %MEM – Physical memory ratio TIME+ – Cumulative CPU time COMMAND – Execu ...

System Environment Host: Windows 10 Pro with VMWare Workstation 15 Pro Guest: CentOS 7.6.1810 (Core) Privilegse: Root user Procedure Refresh the package index and upgrade instaleld packages. yum update -y Install required development libraries and tools. yum groupinstall "Development Tools" -y yum install zlib-devel bzip2-devel ope ...

Von Neumann Architecture Concept of Von Neumann Architecture The Von Neumann architecture, also known as the Princeton architecture, defines a computer design where program instructions and data share the same memory space. This model was proposed by mathematician John von Neumann, who outlined three fundamental principles for computer construc ...

Network Communication Using Sockets on Linux =================== Network Communication with Sockets on Linux Understanding Sockets Types of Sockets Socket Usage Example (SOCK_STREAM) Parameter Explanation 4.1 socket() 4.2 bind() Byte Order Considerations 4.3 listen(), connect() 4.4 accept() 4.5 read(), write(), and related fun ...

Overview Zabbix Proxy acts as an intermediary, collecting performance metrics and availability data from monitored nodes and forwarding them to the central Zabbix Server. This architecture effectively reduces the processing burden on the primary server, facilitates monitoring across isolated network segments, and allows for massive horizontal s ...

Real-time Network Trafffic Monitoring Script #!/bin/bash PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export PATH monitor_interface() { local interface=$1 local os_info=$(sed -n '1p' /etc/issue) if [ ! -d /sys/class/net/$interface ]; then echo "Interface not found" echo "Available interfa ...

Library Files Libraries are collections of precompiled methods that provide ready-to-use variables, functions, or classes. They exist as files on a computer system. Linux supports two types of libraries: static libraries (with .a extension) and shared libraries (with .so extension). The naming convention follows lib[name].a for static libraries ...

Principle of Minimal Operation 1.1 Minimal System Installation When installing the Linux operating system, select only the essential package groups: base--------------------------basic environment editors-----------------------editors development librarys------development libraries development tools---------development tools x software deve ...