How to use Linux tools to monitor and manage system CPU usage
对于使用 Linux 系统的用户来说,了解系统 CPU 的使用情况是至关重要的。无论是开发人员还是管理员,都需要监控和管理系统的 CPU 使用率,以确保系统的稳定性和性能。本文将向您介绍如何使用 Linux 命令行工具来监控和管理系统的 CPU 使用率,并提供一些有用的技巧和建议。
什么是 ps 命令
ps 是进程状态processes status,它显示有关系统上活动/正在运行的进程的信息。
它提供了当前进程的快照以及详细信息,例如用户名、用户 ID、CPU 使用率、内存使用率、进程开始日期和时间等。
1)检查高 CPU 消耗进程在 Linux 上运行了多长时间的 Bash 脚本
该脚本将帮助你确定高 CPU 消耗进程在 Linux 上运行了多长时间。
# vi /opt/scripts/long-running-cpu-proc.sh #!/bin/bash ps -eo pid,user,ppid,%mem,%cpu,cmd --sort=-%cpu | head | tail - n +2 | awk '{print $1}' > /tmp/long-running-processes.txt echo "-------------------------------------------------- " echo "UName PID CMD Process_Running_Time" echo "------------------------ --------------------------" for userid in `cat /tmp/long-running-processes.txt` do username=$(ps -u -p $userid | tail -1 | awk '{print $1}') pruntime=$(ps -p $userid -o etime | tail -1) ocmd=$(ps -p $userid | tail -1 | awk '{print $4}') echo "$username $userid $ocmd $pruntime" done | column -t echo "--------------------------------------------------"
给 long-running-cpu-proc.sh 设置可执行的 Linux 文件权限。
# chmod +x /opt/scripts/long-running-cpu-proc.sh
运行此脚本时,你将获得类似以下的输出:
# sh /opt/scripts/long-running-cpu-proc.sh ---------------------------------------------------- UName PID CMD Process_Running_Time ---------------------------------------------------- daygeek 5214 Web 01:18:48 daygeek 5748 Web 01:08:20 daygeek 8043 inkscape 22:11 daygeek 5269 Web 01:18:31 daygeek 1712 Web 10:44:50 daygeek 5335 RDD 01:17:54 daygeek 1639 firefox 10:44:51 daygeek 7793 nautilus 24:14 daygeek 6301 Web 57:40 ----------------------------------------------------
2)检查高内存消耗进程在 Linux 上运行了多长时间的 Bash 脚本
该脚本将帮助你确定最大的内存消耗进程在 Linux 上运行了多长时间。
# sh /opt/scripts/long-running-memory-proc.sh #!/bin/bash ps -eo pid,user,ppid,%mem,%cpu,cmd --sort=-%mem | head | tail - n +2 | awk '{print $1}' > /tmp/long-running-processes-1.txt echo "-------------------------------------------------- " echo "UName PID CMD Process_Running_Time" echo "----------------------------- ---------------------" for userid in `cat /tmp/long-running-processes-1.txt` do username=$(ps -u -p $userid | tail -1 | awk '{print $1}') pruntime=$(ps -p $userid -o etime | tail -1) ocmd=$(ps -p $userid | tail -1 | awk '{print $4}') echo "$username $userid $ocmd $pruntime" done | column -t echo "--------------------------------------------------"
给 long-running-memory-proc.sh 设置可执行的 Linux 文件权限。
# chmod +x /opt/scripts/long-running-memory-proc.sh
运行此脚本时,你将获得类似以下的输出:
# sh /opt/scripts/long-running-memory-proc.sh ---------------------------------------------------- UName PID CMD Process_Running_Time ---------------------------------------------------- daygeek 1639 firefox 10:44:56 daygeek 2997 Web 10:39:54 daygeek 5269 Web 01:18:37 daygeek 1712 Web 10:44:55 daygeek 8043 inkscape 22:17 daygeek 5214 Web 01:18:54 daygeek 1898 Web 10:44:48 daygeek 1129 Xorg 10:45:07 daygeek 6301 Web 57:45 ----------------------------------------------------
在本文中,我们介绍了如何使用 Linux 命令行工具来监控和管理系统的 CPU 使用率,包括 top、htop、ps 等常用命令。我们还提供了一些实用的技巧和建议,可以帮助您更好地优化系统性能,提高运行效率。希望通过阅读本文,您可以更好地了解系统 CPU 的使用情况,同时也能够更好地管理和优化 Linux 系统的性能。
The above is the detailed content of How to use Linux tools to monitor and manage system CPU usage. For more information, please follow other related articles on the PHP Chinese website!

The main tasks of Linux system administrators include system monitoring and performance tuning, user management, software package management, security management and backup, troubleshooting and resolution, performance optimization and best practices. 1. Use top, htop and other tools to monitor system performance and tune it. 2. Manage user accounts and permissions through useradd commands and other commands. 3. Use apt and yum to manage software packages to ensure system updates and security. 4. Configure a firewall, monitor logs, and perform data backup to ensure system security. 5. Troubleshoot and resolve through log analysis and tool use. 6. Optimize kernel parameters and application configuration, and follow best practices to improve system performance and stability.

Learning Linux is not difficult. 1.Linux is an open source operating system based on Unix and is widely used in servers, embedded systems and personal computers. 2. Understanding file system and permission management is the key. The file system is hierarchical, and permissions include reading, writing and execution. 3. Package management systems such as apt and dnf make software management convenient. 4. Process management is implemented through ps and top commands. 5. Start learning from basic commands such as mkdir, cd, touch and nano, and then try advanced usage such as shell scripts and text processing. 6. Common errors such as permission problems can be solved through sudo and chmod. 7. Performance optimization suggestions include using htop to monitor resources, cleaning unnecessary files, and using sy

The average annual salary of Linux administrators is $75,000 to $95,000 in the United States and €40,000 to €60,000 in Europe. To increase salary, you can: 1. Continuously learn new technologies, such as cloud computing and container technology; 2. Accumulate project experience and establish Portfolio; 3. Establish a professional network and expand your network.

The main uses of Linux include: 1. Server operating system, 2. Embedded system, 3. Desktop operating system, 4. Development and testing environment. Linux excels in these areas, providing stability, security and efficient development tools.

The Internet does not rely on a single operating system, but Linux plays an important role in it. Linux is widely used in servers and network devices and is popular for its stability, security and scalability.

The core of the Linux operating system is its command line interface, which can perform various operations through the command line. 1. File and directory operations use ls, cd, mkdir, rm and other commands to manage files and directories. 2. User and permission management ensures system security and resource allocation through useradd, passwd, chmod and other commands. 3. Process management uses ps, kill and other commands to monitor and control system processes. 4. Network operations include ping, ifconfig, ssh and other commands to configure and manage network connections. 5. System monitoring and maintenance use commands such as top, df, du to understand the system's operating status and resource usage.

Introduction Linux is a powerful operating system favored by developers, system administrators, and power users due to its flexibility and efficiency. However, frequently using long and complex commands can be tedious and er

Linux is suitable for servers, development environments, and embedded systems. 1. As a server operating system, Linux is stable and efficient, and is often used to deploy high-concurrency applications. 2. As a development environment, Linux provides efficient command line tools and package management systems to improve development efficiency. 3. In embedded systems, Linux is lightweight and customizable, suitable for environments with limited resources.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Dreamweaver Mac version
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

WebStorm Mac version
Useful JavaScript development tools