rtop monitors remote hosts via SSH

rtop is a direct, interactive remote system monitoring tool based on SSH that collects and displays important system performance indicators such as CPU, disk, memory and network indicators.

It is written in Go and does not require any additional programs to be installed on the server to be monitored, except for an SSH server and login credentials.

rtop basically collects various system performance information by starting an SSH session and executing certain commands on the remote server.

Once the SSH session is established, it refreshes the information collected from the remote server every few seconds (5 seconds by default), similar to all other top-like utilities in Linux (such as htop).

Installation requirements:

To install rtop make sure you have installed Go (GoLang) 1.2 or higher in Linux, otherwise please click the link below and follow the steps to install GoLang:

• Install GoLang (Go programming language) in Linux

How to install rtop in Linux system

If you already have Go installed, run the following command to build rtop:

$ go get github.com/rapidloop/rtop

After the command is completed, the rtop executable program will be saved in $GOPATH/bin or $GOBIN.

Building rtop in Linux

Note: No runtime environment or configuration is required to use rtop.

How to use rtop in Linux system

Trying to run rtop without any flags or parameters, the following message will be displayed:

$ $GOBIN/rtop

Example output:

rtop 1.0 - (c) 2015 RapidLoop - MIT Licensed - http://rtop-monitor.org
rtop monitors server statistics over an ssh connection
Usage: rtop [-i private-key-file] [user@]host[:port] [interval]
-i private-key-file
PEM-encoded private key file to use (default: ~/.ssh/id_rsa if present)
[user@]host[:port]
the SSH server to connect to, with optional username and port
interval
refresh interval in seconds (default: 5)

Now let us use rtop to monitor the remote Linux server. By default, the collected information is refreshed every 5 seconds:

$ $GOBIN/rtop aaronkilik@10.42.0.1 

rtop – Monitor remote Linux hosts

The command will refresh the system performance indicators every 10 seconds:

$ $GOBIN/rtop aaronkilik@10.42.0.1 10

rtop can also use ssh-agent, key or password to authorize the connection.

• Visit rtop’s Github repository: https://github.com/rapidloop/rtop.

To summarize, rtop is an easy-to-use remote server monitoring tool that uses very few and straightforward options. You can improve your Linux performance monitoring skills by reading about other command line tools for monitoring systems in your server.

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