Installing htop and using nohup for long-running SSH sessions on Intel-based QNAP NAS (QTS 5.1+)

Installing htop and Running Long-Running SSH Sessions on Intel-based QNAP NAS (QTS 5.1+)

As a proud owner of an Intel-based QNAP NAS, you may be looking to enhance your experience and access more advanced tools. One such tool is htop, a popular interactive process viewer for Linux systems. Additionally, it is often useful to run long-running SSH sessions without keeping the terminal open. This article will guide you through installing htop and configuring long-running SSH sessions on your Intel-based QNAP NAS running QTS 5.1 or later.

What is htop, and why use it?

htop is an interactive process viewer for Unix systems. It is an alternative to the traditional top command, providing a more user-friendly interface and additional features like tree view, sorting by various criteria, and better process management.

Prerequisites

1. An Intel-based QNAP NAS running QTS 5.1 or later.
2. A basic understanding of SSH and command-line interface.

Installing htop

To install htop on your QNAP NAS, you'll need to use the Optware package manager. Here is a step-by-step guide for the installation:

1. Enable Telnet or SSH on your QNAP NAS and log in using your preferred method.
2. Install the Optware IPKG package manager by running this command:

curl -L https://raw.githubusercontent.com/ service/homebrew-optware/main/bootstrap.sh | sh

3. Add the following line to the end of the /etc/profile file to ensure ipkg is added to the PATH variable:

export PATH=/opt/bin:$PATH

4. Update the package list and install htop using the following commands:

ipkg update
ipkg install htop

Running long-running SSH sessions

Running long-running SSH sessions can be achieved using the nohup and screen commands on your QNAP NAS.

nohup

The nohup command allows you to run commands that keep running even after you log out of the system. Here's an example:

nohup command-to-run &

Replace command-to-run with the command you want to execute in the background.

screen

screen is a terminal multiplexer that creates a new session and allows you to use multiple virtual terminals within one session. This is helpful for running long-term processes while maintaining the ability to disconnect from the terminal without terminating the process.

1. Install screen using the following command:

ipkg install screen

2. Start a new screen session using the following command:

screen -S session-name

Replace session-name with your desired session identifier.

3. Run your command or application inside the new screen session.
4. If you wish to detach from the screen and close the terminal, use the Ctrl-A followed by D command sequence.
5. To reconnect to your detached screen, run:

screen -r session-name

QNAP NAS SSH scripts

Instead of managing SSH sessions manually, you can build custom scripts for your QNAP NAS to help you better manage long-running processes.

Here's an example of a QNAP NAS SSH script that uses nohup:

#!/bin/sh
# Your SSH command goes here
ssh user@remote-server "command-to-run" &
# The nohup command keeps the process running in the background
nohup -p $(echo $! - 1)

Replace user@remote-server and command-to-run with your specific details.

Summary

This article has provided you with a guide for installing htop on your Intel-based QNAP NAS and managing long-running SSH sessions using the nohup and screen commands. With this information, you can enjoy an improved QNAP NAS experience and make the most of your Intel-based device.

References

1. Articles
   • How to Install htop on QNAP
   • QNAP Manual SSH - Auto Reconnect
2. Online Resources
   • Optware for QNAP
   • GNU Screen on QNAP