Command Line Tools to Monitor Linux Performance. It’s really very tough job for every System or Network administrator to monitor and debug Linux 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 2. 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. 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 many Linux/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 usage, Swap Memory, Cache Size, Buffer Size, Process PID, User, Commands 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 : 1. TOP Command Examples in Linux. Vm. Stat – Virtual Memory Statistics. Linux Vm. Stat command used to display statistics of virtual memory, kernerl threads, disks, system processes, I/O blocks, interrupts, CPU activity and much more. Previous Entry Free Photoshop tool – http:// Next Entry Search for music with google. Software and Apps for Linux. By default vmstat command is not available under Linux systems you need to install a package called sysstat that includes a vmstat program. The common usage of command format is.# vmstat. For more Vmstat examples read : 6 Vmstat Command Examples in Linux. 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 files, network sockets, pipes, devices 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. Calls one batch program from another. If Command Extensions. We've compiled the list of Top 20 frequently used command line monitoring tools that might be useful for every Linux/Unix System Administrator. GnuPG is a complete and free implementation of the OpenPGP standard as defined by RFC4880 (also known as PGP). GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as. On the waterfront in Downtown Toronto since 1894.From novice to old salt, there is a place for everyone at The National Yacht Club. It can read and write images in a variety of formats (over 200) including PNG, JPEG, JPEG-2000, GIF, WebP, Postscript, PDF, and SVG. PHP is a server-side scripting language designed primarily for web development but is also used as a general-purpose programming language. Originally created by Rasmus Lerdorf in 1994, the PHP reference implementation is now.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. DIR 1. 04,2 4. DIR 1. 04,2 4. REG 1. 04,2 3. REG 1. 04,2 1. REG 1. 04,2 1. 69. PHP is a popular general-purpose scripting language that is especially suited to web development. Fast, flexible and pragmatic, PHP powers everything from your blog to the most popular websites in the world. Create, open and extract all popular archive formats such as Zip, RAR, 7-zip, ISO, TAR and Gzip for FREE. Jzip - the best file compression solution! REG 1. 04,2 2. REG 1. 04,2 2. REG 1. 04,2 9. FIFO 0,1. 7 9. More lsof command usage and examples : 1. Command Examples in Linux. 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. 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 . 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 process, shortcut keys, vertical 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. Iotop – Monitor Linux Disk I/OIotop 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. Iostat – Input/Output Statistics. Io. Stat 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 including devices, local disks, remote disks such as NFS.# iostat. Linux 2. 6. 1. 8- 2. Device: tps Blk. IPTraf – Real Time IP LAN Monitoring. IPTraf is an open source console- based real time network (IP LAN) monitoring utility for Linux. 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. Psacct or Acct – Monitor User Activitypsacct 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. 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, My. SQL, Mail, FTP, Pro. FTP, 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. It also keeps a track of real time network traffic bandwidth used by each program or application. Net. Hogs Linux Bandwidth Monitoring. Read More : Monitor Linux Network Bandwidth Using Net. Hogs. 13. 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 Monitors system load average and usage, memory allocation, disk driver health, system services, network ports, mail statistics (Sendmail, Postfix, Dovecot, etc), My. SQL 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. Arpwatch – Ethernet Activity Monitor. Arpwatch is a kind of program that is designed to monitor Address Resolution (MAC and IP address 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. Suricata – Network Security Monitoring. Suricata is an high performance open source Network Security and Intrusion Detection and Prevention Monitoring System for Linux, Free. BSD 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. Vn. Stat PHP – Monitoring Network Bandwidth. Vn. Stat PHP a web based frontend application for most popular networking tool called “vnstat“. Vn. Stat PHP monitors a network traffic usage in nicely graphical mode. It displays a total IN and OUT network traffic usage in hourly, daily, monthly and full summary report. Read More : Vn. Stat PHP – Monitoring Network Bandwidth. 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. Nmon: Monitor Linux Performance. Nmon (stands for Nigel. This tool comes in two modes: Online Mode and Capture Mode. The Online Mode, is used for real- time monitoring and Capture Mode, is used to store the output in CSV format for later processing. Nmon Monitoring. Read More: Install Nmon (Performance Monitoring) Tool in Linux. Collectl: All- in- One Performance Monitoring Tool. Collectl is a yet another powerful and feature rich command line based utility, that can be used to gather information about Linux system resources such as CPU usage, memory, network, inodes, processes, nfs, tcp, sockets and much more. Collectl Monitoring. Read More: Install Collectl (All- in- One Performance Monitoring) Tool in Linux. We would like to know what kind of monitoring programs you use to monitor performance of your Linux servers?
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