By Ravi Saive Under: Linux CommandsMonitoring Tools On: December 26, 2013

http://www.tecmint.com/command-line-tools-to-monitor-linux-performance/

It’s really very tough job for every System or Network administrator to monitor and debugLinux System Performance problems every day. After being a Linux Administrator for 5 years in IT industry, I came to know that how hard is to monitor and keep systems up and running. For this reason, we’ve compiled the list of Top 18 frequently used command line monitoring tools that might be useful for every Linux/Unix System Administrator. These commands are available under all flavors of Linux and can be useful to monitor and find the actual causes of performance problem. This list of commands shown here are very enough for you to pick the one that is suitable for your monitoring scenario.

Linux Command Line Monitoring

1. Top – Linux Process Monitoring

Linux Top command is a performance monitoring program which is used frequently by many system administrators to monitor Linux performance and it is available under manyLinux/Unix like operating systems. The top command used to dipslay all the running and active real-time processes in ordered list and updates it regularly. It display CPU usage,Memory usageSwap MemoryCache SizeBuffer SizeProcess PIDUserCommands and much more. It also shows high memory and cpu utilization of a running processess. The top command is much userful for system administrator to monitor and take correct action when required. Let’s see top command in action.

# top

Top Command Example

For more examples of Top command read : 12 TOP Command Examples in Linux

2. VmStat – Virtual Memory Statistics

Linux VmStat command used to display statistics of virtual memorykernerl threads,diskssystem processesI/O blocksinterruptsCPU activity and much more. By default vmstat command is not available under Linux systems you need to install a package calledsysstat that includes a vmstat program. The common usage of command format is.

# vmstat

procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
r b swpd free inact active si so bi bo in cs us sy id wa st
1 0 0 810420 97380 70628 0 0 115 4 89 79 1 6 90 3 0

For more Vmstat examples read : 6 Vmstat Command Examples in Linux

3. Lsof – List Open Files

Lsof command used in many Linux/Unix like system that is used to display list of all the open files and the processes. The open files included are disk filesnetwork sockets,pipesdevices and processes. One of the main reason for using this command is when a disk cannot be unmounted and displays the error that files are being used or opened. With this commmand you can easily identify which files are in use. The most common format for this command is.

# lsof

COMMAND     PID      USER   FD      TYPE     DEVICE     SIZE       NODE NAME
init 1 root cwd DIR 104,2 4096 2 /
init 1 root rtd DIR 104,2 4096 2 /
init 1 root txt REG 104,2 38652 17710339 /sbin/init
init 1 root mem REG 104,2 129900 196453 /lib/ld-2.5.so
init 1 root mem REG 104,2 1693812 196454 /lib/libc-2.5.so
init 1 root mem REG 104,2 20668 196479 /lib/libdl-2.5.so
init 1 root mem REG 104,2 245376 196419 /lib/libsepol.so.1
init 1 root mem REG 104,2 93508 196431 /lib/libselinux.so.1
init 1 root 10u FIFO 0,17 953 /dev/initctl

More lsof command usage and examples : 10 lsof Command Examples in Linux

4. Tcpdump – Network Packet Analyzer

Tcpdump one of the most widely used command-line network packet analyzer or packets sniffer program that is used capture or filter TCP/IP packets that received or transferred on a specific interface over a network. It also provides a option to save captured packages in a file for later analysis. tcpdump is almost available in all major Linux distributions.

# tcpdump -i eth0

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
22:08:59.617628 IP tecmint.com.ssh > 115.113.134.3.static-mumbai.vsnl.net.in.28472: P 2532133365:2532133481(116) ack 3561562349 win 9648
22:09:07.653466 IP tecmint.com.ssh > 115.113.134.3.static-mumbai.vsnl.net.in.28472: P 116:232(116) ack 1 win 9648
22:08:59.617916 IP 115.113.134.3.static-mumbai.vsnl.net.in.28472 > tecmint.com.ssh: . ack 116 win 64347

For more tcpdump usage read : 12 Tcpdump Command Examples in Linux

5. Netstat – Network Statistics

Netstat is a command line tool for monitoring incoming and outgoing network packets statistics as well as interface statistics. It is very useful tool for every system administrator to monitor network performance and troubleshoot network related problems.

# netstat -a | more

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 *:mysql *:* LISTEN
tcp 0 0 *:sunrpc *:* LISTEN
tcp 0 0 *:realm-rusd *:* LISTEN
tcp 0 0 *:ftp *:* LISTEN
tcp 0 0 localhost.localdomain:ipp *:* LISTEN
tcp 0 0 localhost.localdomain:smtp *:* LISTEN
tcp 0 0 localhost.localdomain:smtp localhost.localdomain:42709 TIME_WAIT
tcp 0 0 localhost.localdomain:smtp localhost.localdomain:42710 TIME_WAIT
tcp 0 0 *:http *:* LISTEN
tcp 0 0 *:ssh *:* LISTEN
tcp 0 0 *:https *:* LISTEN

More Netstat examples : 20 Netstat Command Examples in Linux.

6. Htop – Linux Process Monitoring

Htop is a much advanced interactive and real time Linux process monitoring tool. This is much similar to Linux top command but it has some rich features like user friendly interface to manage processshortcut keysvertical and horizontal view of the processes and much more. Htop is a third party tool and doesn’t included in Linux systems, you need to install it using YUM package manager tool. For more information on installation read our article below.

# htop

Htop Command Example Screenshot

For Htop installation read : Install Htop (Linux Process Monitoring) in Linux

7. Iotop – Monitor Linux Disk I/O

Iotop is also much similar to top command and Htop program, but it has accounting function to monitor and display real time Disk I/O and processes. This tool is much useful for finding the exact process and high used disk read/writes of the processes.

# iotop

Iotop Command Example Screenshot

For Ioptop installation and usage read : Install Iotop in Linux

8. Iostat – Input/Output Statistics

IoStat is simple tool that will collect and show system input and output storage device statistics. This tool is often used to trace storage device performance issues includingdeviceslocal disksremote disks such as NFS.

# iostat

Linux 2.6.18-238.9.1.el5 (tecmint.com)         09/13/2012

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
2.60 3.65 1.04 4.29 0.00 88.42 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
cciss/c0d0 17.79 545.80 256.52 855159769 401914750
cciss/c0d0p1 0.00 0.00 0.00 5459 3518
cciss/c0d0p2 16.45 533.97 245.18 836631746 384153384
cciss/c0d0p3 0.63 5.58 3.97 8737650 6215544
cciss/c0d0p4 0.00 0.00 0.00 8 0
cciss/c0d0p5 0.63 3.79 5.03 5936778 7882528
cciss/c0d0p6 0.08 2.46 2.34 3847771 3659776

For more Iostat usage and examples visit : 6 Iostat Command Examples in Linux

9. IPTraf – Real Time IP LAN Monitoring

IPTraf is an open source console-based real time network (IP LAN) monitoring utility forLinux. It collects a variety of information such as IP traffic monitor that passes over the network, including TCP flag information, ICMP details, TCP/UDP traffic breakdowns, TCP connection packet and byne counts. It also gathers information of general and detaled interface statistics of TCP, UDP, IP, ICMP, non-IP, IP checksum errors, interface activity etc.

IP Traffic Monitor

For more information and usage of IPTraf tool, please visit : IPTraf Network Monitoring Tool

10. Psacct or Acct – Monitor User Activity

psacct or acct tools are very useful for monitoring each users activity on the system. Both daemons runs in the background and keeps a close watch on the overall activity of each user on the system and also what resources are being consumed by them.

These tools are very useful for system administrators to track each users activity like what they are doing, what commands they issued, how much resources are used by them, how long they are active on the system etc.

For installation and example usage of commands read the article on Monitor User Activity with psacct or acct

11. Monit – Linux Process and Services Monitoring

Monit is a free open source and web based process supervision utility that automatically monitors and managers system processes, programs, files, directories, permissions, checksums and filesystems.

It monitors services like Apache, MySQL, Mail, FTP, ProFTP, Nginx, SSH and so on. The system status can be viewed from the command line or using it own web interface.

Monit Linux Process Monitoring

Read More : Linux Process Monitoring with Monit

12. NetHogs – Monitor Per Process Network Bandwidth

NetHogs is an open source nice small program (similar to Linux top command) that keeps a tab on each process network activity on your system. It also keeps a track of real time network traffic bandwidth used by each program or application.

NetHogs Linux Bandwidth Monitoring

Read More : Monitor Linux Network Bandwidth Using NetHogs

13. iftop – Network Bandwidth Monitoring

iftop is another terminal-based free open source system monitoring utility that displays a frequently updated list of network bandwidth utilization (source and destination hosts) that passing through the network interface on your system. iftop is considered for network usage, what ‘top‘ does for CPU usage. iftop is a ‘top‘ family tool that monitor a selected interface and displays a current bandwidth usage between two hosts.

iftop – Network Bandwidth Monitoring

Read More : iftop – Monitor Network Bandwidth Utilization

14. Monitorix – System and Network Monitoring

Monitorix is a free lightweight utility that is designed to run and monitor system and network resources as many as possible in Linux/Unix servers. It has a built in HTTP web server that regularly collects system and network information and display them in graphs. It Monitorssystem load average and usagememory allocationdisk driver healthsystem servicesnetwork portsmail statistics (SendmailPostfixDovecot, etc), MySQL statistics and many more. It designed to monitor overall system performance and helps in detecting failures, bottlenecks, abnormal activities etc.

Monitorix Monitoring

Read More : Monitorix a System and Network Monitoring Tool for Linux

15. Arpwatch – Ethernet Activity Monitor

Arpwatch is a kind of program that is designed to monitor Address Resolution (MAC and IPaddress changes) of Ethernet network traffic on a Linux network. It continuously keeps watch on Ethernet traffic and produces a log of IP and MAC address pair changes along with a timestamps on a network. It also has a feature to send an email alerts to administrator, when a pairing added or changes. It is very useful in detecting ARP spoofing on a network.

Read More : Arpwatch to Monitor Ethernet Activity

16. Suricata – Network Security Monitoring

Suricata is an high performance open source Network Security and Intrusion Detectionand Prevention Monitoring System for LinuxFreeBSD and Windows.It was designed and owned by a non-profit foundation OISF (Open Information Security Foundation).

Read More : Suricata – A Network Intrusion Detection and Prevention System

17. VnStat PHP – Monitoring Network Bandwidth

VnStat PHP a web based frontend application for most popular networking tool called “vnstat“. VnStat PHP monitors a network traffic usage in nicely graphical mode. It displays a total IN and OUT network traffic usage in hourlydailymonthly and full summary report.

Read More : VnStat PHP – Monitoring Network Bandwidth

18. Nagios – Network/Server Monitoring

Nagios is an leading open source powerful monitoring system that enables network/system administrators to identify and resolve server related problems before they affect major business processes. With the Nagios system, administrators can able to monitor remote Linux, Windows, Switches, Routers and Printers on a single window. It shows critical warnings and indicates if something went wrong in your network/server which indirectly helps you to begin remediation processes before they occur.

Read More : Install Nagios Monitoring System to Monitor Remote Linux/Windows Hosts

We would like to know what kind of monitoring programs you use to monitor performance of your Linux servers? If we’ve missed any important tool that you would like us to include in this list, please inform us via comments and please don’t forget to share it.

18 Command Line Tools to Monitor Linux Performance的更多相关文章

  1. 怎样安装Command Line Tools in OS x Mavericks&Yosemite(Without xcode)--转载

    How to Install Command Line Tools in OS X Mavericks & Yosemite (Without Xcode) Mac users who pre ...

  2. logoff remote desktop sessions via command line tools

    This trick I learned from my one of ex-college.  In Windows servers, only two remote desktop session ...

  3. xcode5下面安装Command Line Tools

    运行命令 sudo xcode-select --install 就会显示一行文字,并且弹出一个对话框,确认安装后他就会自己下载来安装了. 至此,Command Line Tools就能够重新复活了

  4. MAC 命令行工具(Command Line Tools)安装

    不过升级后安装命令行工具(Command Line Tools)时发现官网没有clt的下载安装包了,原来改了,使用命令在线安装. 打开终端,输入命令:xcode-select --install 选择 ...

  5. Mac appium.dmg. Xcode Command Line Tools

    You need to install the command line tools as marked in your message: ✖ Xcode Command Line Tools are ...

  6. appium----【已解决】【Mac】环境配置提示“Xcode Command Line Tools are NOT installed!"

    报错问题提示截图如下: 报错原因 :根据给出的信息很明显可以看到是"Xcode Command Line Tools"此工具没有安装 解决措施: 打开终端直接执行:xcode-se ...

  7. Xcode 8.X Command Line Tools

    Summary Step 1. Upgrade Your System to macOS Sierra Step 2. Open the Terminal Application Step 3. Is ...

  8. Xcode command line tools

    1.Xcode command line tools 安装 如果你不是一名 iOS 或 OS X 开发者,可以跳过安装 XCode 的过程,直接安装 Xcode command line tools. ...

  9. the command line tools

    PhpStorm 10.0.2 http://stackoverflow.com/questions/22572861/error-cant-use-subversion-command-line-c ...

随机推荐

  1. ping包,支持ip录入

    @echo off ::等待用户输入需要监控IP set /p ip=Input the IP required to monitor: echo executing...... :start ech ...

  2. angular 引入第三方库

    第一步 --save:自动写入package.json 第二步: 第三部: 为了让typescript识别$ 第四步:

  3. EventTrigger

    EventTrigger事件触发器. 相比较数据,属性,事件触发器是XAML的UI层中最重要的一个部分. 事件触发器中,触发的效果是动画,不再是setter. 也是很有意思的 <对象.Style ...

  4. 第八篇 Python异常

    程序在运行时,如果Python解释器遇到一个错误,会停止程序的执行,并且提示一些错误信息,这就是异常,程序通知执行并且提示错误信息,这个动作,我们通常称之为:抛出异常. 1.简单的捕获异常的语法 在程 ...

  5. 手动创建spring项目(maven/IDEA环境)

    1.创建maven项目 按照步骤一步一步来 创建项目 这里选择maven的模板 设置包名 设置项目的maven的配置信息.maven仓库路径(会从maven配置文件中获取) 这里设置项目名.项目保存路 ...

  6. ASPxGridView后台实现隐藏新增按钮

    (ASPxGridView2.Columns[0] as GridViewCommandColumn).NewButton.Visible = false;//0应该代表的是NewButton所在的列 ...

  7. 题解 P1614 【爱与愁的心痛】

    题目链接 前缀和. #重点在一个小小的常数优化 但是数据大了以后比楼下们跑的会快!!! 楼下用前缀和的题解都是跑了两遍循环. 而实际上一遍循环就可以呀. 就是加一段这个 if(i>=m) if( ...

  8. 开发效率神器 uTools - 偏前端和 UI

    本文首发于:Bougie's Blog - 效率神器 uTools 前言 今天组内公众号推荐了 Mac 上的效率神器 Alfred. 详情链接:效率神器 Alfred workflow 插件推荐 早上 ...

  9. 文件句柄NSFileHandle

    //一.读取 //1.以只读方式打开 NSFileHandle *fh = [NSFileHandle fileHandleForReadingAtPath:txtPath]; //2.读取所有内容 ...

  10. SOAP XML报文解析

    import java.util.HashMap;import java.util.List;import java.util.Map; import org.dom4j.Document;impor ...