Synthetic Monitoring

Simulate visitor interaction with your site to monitor the end user experience.

View Product Info

FEATURES

Simulate visitor interaction

Identify bottlenecks and speed up your website.

Learn More

Real User Monitoring

Enhance your site performance with data from actual site visitors

View Product Info

FEATURES

Real user insights in real time

Know how your site or web app is performing with real user insights

Learn More

Infrastructure Monitoring Powered by SolarWinds AppOptics

Instant visibility into servers, virtual hosts, and containerized environments

View Infrastructure Monitoring Info
Comprehensive set of turnkey infrastructure integrations

Including dozens of AWS and Azure services, container orchestrations like Docker and Kubernetes, and more 

Learn More

Application Performance Monitoring Powered by SolarWinds AppOptics

Comprehensive, full-stack visibility, and troubleshooting

View Application Performance Monitoring Info
Complete visibility into application issues

Pinpoint the root cause down to a poor-performing line of code

Learn More

Log Management and Analytics Powered by SolarWinds Loggly

Integrated, cost-effective, hosted, and scalable full-stack, multi-source log management

 View Log Management and Analytics Info
Collect, search, and analyze log data

Quickly jump into the relevant logs to accelerate troubleshooting

Learn More

Powerful command line tools for network administrators

When it comes to taking care of our networking infrastructure here at Pingdom, the DevOps team works with a wide range of hardware and software tools.

With this article, we want to give you some suggestions for command line tools and utilities that are a common part of our toolbox. We have tried to make a varied selection so that there is hopefully something in here that you find useful in your daily admin work.

mtr

mtr

MTR (My traceroute), originally called Matt’s traceroute, is a combined ping and traceroute. It pings every hop to the target continuously to see on which hop(s) packet loss or latency exists.

Install in Ubuntu:

sudo apt-get install mtr-tiny

Test run:

mtr www.pingdom.com

pv

Pipe Viewer checks how many lines/characters per second that goes through a Linux pipe. For example, this can be used to see how many lines per second that goes through a log.

Install in Ubuntu:

sudo apt-get install pv

Test run:

sudo tail -f /var/log/apache/access.log | 
grep "/testpage.html" | pv -lr >/dev/null

This will display how many times per second “/testpage.html” shows up in the access log. In other words, how many accesses that particular page gets per second in real-time.

nc

nc

Netcat is a general toolbox for TCP and UDP connections. You can send data as well as  listen to and serve up data with it. This is a utility with tremendous potential, which we’ve yet to fully explore.

Examples:

HTTP request:

echo "GET /" | nc www.example.com 80

Serve a web page on port 8080:

echo 'Hello, World!' | nc -l 8080

nmap

nmap

Nmap is a powerful and versatile security scanner. Although we rely on it for many things, we use it mainly as a port scanner, to see which ports that are open on a particular host. Please use nmap with discretion if you use it to scan computers and networks other than your own.

Install in Ubuntu:

sudo apt-get install nmap

Test run:

sudo nmap 192.168.0.150

du

Du (disk usage) shows disk usage of files and directories. It is a powerful way to hunt down what takes up space on a disk.

Test run:

sudo du -sh /home/* (shows usage of each users home directory)

lsof

The lsof (LiSt Open Files) command lists all open files and sockets. Lsof gives you information on which command each process is executing, and which user who opened it. It can also show you which port a daemon is listening on.

Test run:

sudo lsof -i TCP

In the example, lsof will show you information about all open TCP connections and listening sockets.

grc

grc

The General Colorizer tool puts color to any command-output to make it easier to read.

Install in Ubuntu:

sudo apt-get install grc

Test run:

sudo grc cat /var/log/syslog

mosh

Mosh (mobile shell) is a shell like SSH but built for being used on mobile connections. It uses UDP, predictions and various other techniques to make the shell more responsive on connections with high latency and packet loss. It also supports the client to change IP address during a session, and reconnect when contact is lost.

Install in Ubuntu (on both server and client):

sudo apt-get install mosh

Test run:

mosh <hostname>

This requires the mosh package on both server and client. Also, certain UDP ports must be opened if there is a restrictive firewall in between.

byobu

byobu

Byobu is a wrapper around GNU screen and tmux, which adds a window manager of sorts to the text-based shell. You can create new windows (tabs), cycle between them, split views, and much more.

Install in Ubuntu:

sudo apt-get install byobu

Test run:

SSH to a server with Byobu installed (or run it in the local shell) and then run Byobu. You can press F2 to create a new tab, alt-arrow to move between tabs, Ctrl/Shift-F2 to split a window, shift-arrow to move between splits, etc.

What else can you recommend to network administrators?

This is just a small sample of all the command line tools and utilities that we rely on in our everyday work to keep Pingdom running.

Do you have any especially useful command line tool you would like to share with us? Let us know in the comments below.

Image (Top) via Shutterstock.

Introduction to Observability

These days, systems and applications evolve at a rapid pace. This makes analyzi [...]

Webpages Are Getting Larger Every Year, and Here’s Why it Matters

Last updated: February 29, 2024 Average size of a webpage matters because it [...]

A Beginner’s Guide to Using CDNs

Last updated: February 28, 2024 Websites have become larger and more complex [...]

The Five Most Common HTTP Errors According to Google

Last updated: February 28, 2024 Sometimes when you try to visit a web page, [...]

Page Load Time vs. Response Time – What Is the Difference?

Last updated: February 28, 2024 Page load time and response time are key met [...]

Monitor your website’s uptime and performance

With Pingdom's website monitoring you are always the first to know when your site is in trouble, and as a result you are making the Internet faster and more reliable. Nice, huh?

START YOUR FREE 30-DAY TRIAL

MONITOR YOUR WEB APPLICATION PERFORMANCE

Gain availability and performance insights with Pingdom – a comprehensive web application performance and digital experience monitoring tool.

START YOUR FREE 30-DAY TRIAL
Start monitoring for free