Network diagnostics in Linux: mtr — visual check of the route and losses

When a site opens with a delay or the connection is floating, it is important to understand where exactly the problem is occurring: on your host, at the provider, or on one of the intermediate nodes. mtr brings together possibilities ping And traceroute and shows real-time route, packet loss and average delays. By default, the utility works via ICMP; if necessary, you can switch to TCP SYN or UDP — this helps to test exactly the protocols that your application uses.

Below are brief instructions: how to install mtr, run a basic check, display IPs instead of names and generate an accurate final report for correspondence or a ticket.

Installation

If the utility is not already installed, install it through the standard package manager of your system.

Debian/Ubuntu:

sudo apt-get install mtr

CentOS:

sudo yum install mtr

Running a scan

After installation, run mtr, specifying the domain name of the site or the IP address of the server to which you want to check accessibility:

mtr google.com

To display real IP addresses instead of hostnames, add the -n switch:

mtr -n google.com

Selecting package type

If necessary, you can use TCP SYN or UDP rather than standard ICMP echo:

mtr --tcp google.com

mtr --udp google.com

Final report

For convenient final output in the form of a report, specify the report mode -r and the number of packets, for example 100, combined with -n:

mtr -rn -c 100 google.com

This launch generates a neat summary report, which is convenient to analyze and attach to tickets or correspondence.

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