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If you want one practical answer, start with htop for interactive process work, btop for a broad local resource dashboard, Glances when remote access, APIs, or exports matter, and nmon only after checking that your distribution provides a current, usable package. There is no evidence-backed universal winner: each tool emphasizes a different monitoring job.
All four run as software in a terminal. They are not hardware monitors, and you do not need a special display, keyboard, cable, or other peripheral to use them. The right choice depends on the metrics you need, how much process interaction you want, whether the terminal may be small, and whether monitoring must work across a network or feed another system.
What a terminal-based Linux monitor does
A terminal monitor reads operating-system statistics and presents them as an updating, interactive screen. Depending on the program, that screen can include running processes, processor activity, memory use, disks, filesystems, network traffic, or other counters. Some programs are designed mainly for a person sitting at a shell; others can expose the same information through a web interface, an API, or an export destination.
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#1 Best Overall
- CRISP CLARITY: This 23.8″ Philips V line monitor delivers crisp Full HD 1920x1080 visuals. Enjoy movies, shows and videos with remarkable detail
- INCREDIBLE CONTRAST: The VA panel produces brighter whites and deeper blacks. You get true-to-life images and more gradients with 16.7 million colors
- THE PERFECT VIEW: The 178/178 degree extra wide viewing angle prevents the shifting of colors when viewed from an offset angle, so you always get consistent colors
- WORK SEAMLESSLY: This sleek monitor is virtually bezel-free on three sides, so the screen looks even bigger for the viewer. This minimalistic design also allows for seamless multi-monitor setups that enhance your workflow and boost productivity
- A BETTER READING EXPERIENCE: For busy office workers, EasyRead mode provides a more paper-like experience for when viewing lengthy documents
- htop is the process-focused choice. It is suited to finding, inspecting, and managing processes interactively in a terminal.
- btop is the broad local overview choice. Its project describes processor, memory, disks, network, and processes in one monitor.
- Glances is the extensibility and remote-operation choice. Its documentation covers a curses terminal view, client/server operation, web access, APIs, and export options.
- nmon presents a wide set of system metrics, but its project homepage still identifies Linux version 16s as the latest Linux version from November 2015. Treat its current availability and maintenance as distribution-specific.
Official project descriptions do not provide controlled head-to-head measurements of speed, CPU overhead, memory use, or ease of use. The recommendations below therefore describe documented capabilities, not benchmark rankings.
Quick comparison
| Tool | Best fit | Documented scope | Remote, API, or export features | Important caveat |
|---|---|---|---|---|
| htop | Interactive process inspection and management | Process viewer; distribution-provided binaries and source are available | Not established by the reviewed project pages | Package names and versions vary by distribution; check your package manager |
| btop | A single broad local resource view | Processor, memory, disks, network, and processes | Not established by the reviewed project description | Use the project’s current Linux installation instructions because packages and release binaries change |
| Glances | More metrics, remote monitoring, APIs, or exports | Cross-platform curses monitor that adapts information to terminal size | Client/server mode, web access, APIs, and export options | Some capabilities require optional dependencies; documented version is 4.5.8, while distribution packages may differ |
| nmon | A broad metric set where a maintained package is available | CPU, memory, network, disk, filesystem, NFS, and top-process information; Linux and several architectures | Not established by the reviewed project page | Homepage calls Linux version 16s from November 2015 the latest Linux version; verify present-day status |
Which Linux terminal monitor should you use?
Choose htop for process-first work
Use htop when your immediate question is, "Which process is consuming resources, and what can I do about it?" Its official download information describes both source availability and binaries supplied by Linux distributions. That makes it a practical first installation on systems where you need an interactive process viewer rather than a complete operations dashboard.
htop is the sensible default for tasks such as locating a runaway process, inspecting a process list while troubleshooting, or managing processes from a shell session. The evidence does not establish that it is faster, lighter, or easier than the other monitors; select it for its process-oriented role, not for an unmeasured performance claim.
Choose btop for a broad local dashboard
btop is the strongest fit when you want processor, memory, disks, network, and process information visible in one terminal program. The project explicitly lists those areas, so it covers more than a process-only view without requiring you to switch between separate utilities.
Use btop for an at-a-glance answer to questions such as whether a machine is CPU-bound, running short of memory, busy with disk activity, moving network traffic, or dominated by a particular process. This is a functional recommendation based on the project’s documented scope. No controlled comparison in the available material proves that btop refreshes faster or consumes fewer resources than htop, Glances, or nmon.
Choose Glances for remote, API, or export requirements
Glances is the most suitable option when the terminal screen is only one way you need to consume monitoring data. Its documentation describes a curses interface that adapts to terminal size, client/server operation, web access, APIs, and export options. Those capabilities make it a better fit for a workstation that observes another host, a service that reads metrics programmatically, or a workflow that sends monitoring data elsewhere.
Rank #2
- CRISP CLARITY: This 22 inch class (21.5″ viewable) Philips V line monitor delivers crisp Full HD 1920x1080 visuals. Enjoy movies, shows and videos with remarkable detail
- 100HZ FAST REFRESH RATE: 100Hz brings your favorite movies and video games to life. Stream, binge, and play effortlessly
- SMOOTH ACTION WITH ADAPTIVE-SYNC: Adaptive-Sync technology ensures fluid action sequences and rapid response time. Every frame will be rendered smoothly with crystal clarity and without stutter
- INCREDIBLE CONTRAST: The VA panel produces brighter whites and deeper blacks. You get true-to-life images and more gradients with 16.7 million colors
- THE PERFECT VIEW: The 178/178 degree extra wide viewing angle prevents the shifting of colors when viewed from an offset angle, so you always get consistent colors
Glances is also the choice to investigate when you need a wider range of information than a basic process viewer provides. The trade-off is setup complexity: web, export, and other extended functions may require optional dependencies. The project documentation currently identifies version 4.5.8, but a distribution package can lag behind or use a different version.
Consider nmon only after a currency check
nmon’s project page lists CPU, memory, network, disk, filesystem, NFS, and top-process information, and it supports Linux on several architectures. That is a broad metric set on paper. However, the same homepage identifies Linux version 16s and dates it to November 2015 as the latest Linux version.
That date does not prove that no newer build exists anywhere. It does mean you should not assume that a package is current, that every feature works on a modern distribution, or that the project is actively maintained. Check your distribution’s package metadata and the current project status before making nmon a standard monitoring dependency.
Compare monitors by the questions you need answered
1. Which metrics must be visible?
- For process lists and process management, begin with htop.
- For processor, memory, disks, network, and processes in one local view, begin with btop.
- For a wider operational view combined with remote or programmatic access, evaluate Glances.
- For nmon’s listed CPU, memory, network, disk, filesystem, NFS, and top-process categories, first confirm package currency and compatibility.
Do not infer unsupported metrics from a tool’s name. Verify the feature list for the exact build your distribution installs.
2. How much process interaction do you need?
htop is explicitly positioned as an interactive process viewer, so it should be the first choice when navigation and process actions are central. btop also displays processes, but the available material does not establish an equivalent process-management workflow. Glances and nmon are better evaluated for the breadth of information they expose rather than assumed to provide identical interaction controls.
The Tool Desk
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Glances documents behavior that adapts information to terminal size. That matters when you connect over a narrow SSH window, use a split terminal, or monitor from a text console with limited columns. Other projects may also have responsive layouts, but the reviewed evidence does not establish equivalent behavior for htop, btop, or nmon. Test the exact interface in the smallest terminal you expect to support.
Rank #3
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- Wide viewing angle: Get consistent views across a wide 178° /178° viewing angle.
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4. Do you need remote monitoring, an API, or exports?
Glances is the only candidate in this set whose documentation explicitly covers client/server operation, web access, APIs, and export options. Select it when monitoring data must cross a network or be consumed by another program. A local-only process or resource view does not require those features, so htop or btop may be simpler choices for that job.
5. How much installation uncertainty can you accept?
Distribution packages are generally the least surprising route, but the exact package name, version, and optional components vary. htop’s official page specifically points readers toward binaries supplied by distributions and recommends checking the operating system’s package manager. btop documents both distribution packages and release binaries, while Glances can be installed from PyPI with pip and may need extra dependencies for optional functions. nmon requires the most careful currency check because of the dated Linux release notice on its homepage.
Installation guidance that avoids version traps
Install htop through your distribution when possible
- Open your Linux distribution’s package-management tool or repository search.
- Search for the package named htop and inspect the candidate version and repository.
- Install the repository package using the distribution’s normal approval and privilege process.
- Launch htop from a terminal and confirm that the process view starts without errors.
- If your distribution does not provide a suitable package, use the official source-download route and follow the build instructions for your release.
Do not assume that a package name, version, or binary availability is identical across Ubuntu, Debian, Fedora, Arch, SUSE, containers, or embedded distributions. The official htop information confirms distribution-provided binaries in general, not a universal package command.
Install btop from a package or release binary
- Check your distribution repositories for btop and note the version offered.
- If the repository version is absent or unsuitable, consult the project’s current Linux installation instructions for a release binary.
- Install only a build that matches your architecture and distribution environment.
- Start btop and verify that processor, memory, disks, network, and process sections populate on the target host.
- Record the installed version in your system documentation so later troubleshooting can distinguish package differences from configuration problems.
btop’s repository lists both distribution installation methods and release binaries, but those instructions can change. Use the current project directions rather than copying an old command from an unrelated Linux guide.
Install Glances with the dependency set you actually need
- Check whether your distribution already packages Glances and compare that package’s version with the project documentation, which currently identifies version 4.5.8.
- If you use PyPI, install Glances with Python’s pip workflow appropriate to your environment. Prefer an isolated environment when your distribution separates system-managed Python packages from user-installed packages.
- Decide whether you need only the terminal view or also web, client/server, API, and export functions.
- Install the optional dependencies required for the functions you selected, following the project’s current installation guidance.
- Start the terminal monitor locally, then test each enabled remote or export path separately.
- If installation fails while building psutil, check whether your environment has the Python headers and compiler prerequisites required by that dependency.
A distribution package can be older or configured differently from the current project release. Confirm the version and optional feature availability before writing automation that depends on a particular API or exporter.
Evaluate nmon as a distribution-specific package
- Search your distribution repositories for nmon and inspect the package’s maintenance date and version.
- Compare the package information with the project homepage’s notice that Linux version 16s is from November 2015.
- Confirm that the package supports your Linux architecture and kernel environment.
- Run a short observation and verify that the metric categories you require—such as filesystem, NFS, or network data—are available in that build.
- Use nmon as a standard tool only if the package’s currency, support expectations, and required metrics meet your operational needs.
How to choose for common Linux scenarios
Investigating a process that suddenly uses too much CPU
Start with htop. Its process-focused design makes it the clearest fit for locating the process and inspecting the process list interactively. If the incident also requires disk, network, or memory context in the same screen, btop is a reasonable alternative because those categories are part of its documented scope.
Rank #4
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- INCREASED VERSATILITY: Connect to more; Plug devices straight into your monitor for increased flexibility, making your computing environment even more convenient
Checking a server before and during a maintenance window
Use btop when you want a broad local view of processor, memory, disks, network, and processes. If the maintenance procedure is observed remotely from another machine or needs data delivered to a web or export destination, use Glances and validate its optional components before the window begins.
Watching a remote host from a laptop
Evaluate Glances first because its documentation explicitly includes client/server and web operation. Confirm network reachability, authentication, firewall policy, and the exact server and client versions in your environment. A local htop or btop session over SSH can still be useful, but it does not provide the documented Glances-style API and export model.
Working in a narrow SSH or console window
Glances documents adaptation to terminal size, so it is the strongest evidence-backed candidate for constrained displays. Whichever program you choose, test the real terminal dimensions and ensure that the metrics you need remain visible rather than assuming a full-size desktop layout.
Standardizing a tool across many distributions
Prefer a project with a clear installation path for each target distribution and document the version you deploy. htop has distribution-provided binaries; btop documents packages and release binaries; Glances offers package and PyPI routes but may require optional dependencies; nmon needs an explicit maintenance and compatibility review because of its dated homepage release notice.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Troubleshooting and failure modes
The package is missing or too old
Repository contents are distribution-specific. Check enabled repositories, architecture, and the distribution release before concluding that a project is unavailable. For htop and btop, compare the repository package with the project’s official source or release-binary route. For Glances, compare the packaged version with the current project documentation. For nmon, treat an old package as a reason to reassess the tool rather than automatically adding an unofficial build.
Glances starts but an optional feature is unavailable
Installations can succeed while web, export, or other extended functions remain disabled because their dependencies were not installed. Identify the exact feature you need, install its documented optional dependency set, and retest that feature independently. Do not assume that a package containing the Glances name includes every optional integration.
Best Value
- 【INTEGRATED SPEAKERS】Whether you're at work or in the midst of an intense gaming session, our built-in speakers provide rich and seamless audio, all while keeping your desk clutter-free.
- 【EASY ON THE EYES】 Protect your eyes and enhance your comfort with Blue-Light Shift technology. This feature reduces harmful blue light emissions from your screen, helping to alleviate eye strain during long hours of use and promoting healthier viewing habits.
- 【WIDEN YOUR PERSPECTIVE】Our sleek minimal bezel design ensures undivided attention. The nearly bezel-free display seamlessly connects in a dual monitor arrangement, delivering an unobstructed view that lets you focus on more at once, completely distraction-free.
A Glances installation fails while building psutil
The installation documentation notes that Python headers may be needed to build psutil in some environments. Install the development headers and build prerequisites appropriate to your distribution, then repeat the installation in the same Python environment. A failure in one Python environment does not establish that the project itself is incompatible; check interpreter, architecture, and package-manager boundaries.
The screen is too dense or too sparse
Resize the terminal and reassess the layout before changing tools. Glances explicitly adapts its information to terminal size. If a compact console hides the fields you need, use a larger terminal, a remote web view where appropriate, or a monitor whose documented scope better matches your screen constraints.
Metrics are absent or look implausible
- Confirm that you are viewing the intended host rather than a local client process.
- Check whether the distribution package is old relative to the project release.
- Review permissions and container boundaries; a monitor can only report what its environment exposes.
- For Glances, verify optional dependencies for the missing category or export path.
- For nmon, confirm that the distribution build supports the metric category and architecture you selected.
You need a performance comparison
The available official project pages do not provide controlled head-to-head measurements. Do not treat visual density, refresh behavior, or a subjective impression as a benchmark. If overhead is a deployment requirement, measure the exact versions and configurations on a representative host under your own workload.
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- Process management is the priority: choose htop first.
- One local screen should cover CPU, memory, disks, network, and processes: choose btop first.
- Remote operation, APIs, web access, or export are required: evaluate Glances first and plan for optional dependencies.
- You need nmon’s specific metric categories: verify package currency, architecture, and maintenance status before adoption.
- Your terminal may be very small: give Glances early consideration because adaptive terminal behavior is documented.
- You need a reproducible fleet deployment: pin and record versions, test package availability on every target distribution, and avoid assuming that a package is identical across releases.
- You want a speed or resource winner: no evidence here establishes one; run your own controlled measurements.
Bottom line: the best monitor depends on the job
For most individual troubleshooting sessions, htop is the straightforward process monitor. For a broad local dashboard, btop covers the most clearly documented categories in one view. Glances is the better fit when monitoring extends beyond one terminal into client/server use, web access, APIs, or exports, provided you install the optional dependencies those features require. nmon remains a possible broad-metric tool, but its project homepage’s November 2015 Linux release notice makes a current package and maintenance check essential.
Install the candidate that matches your primary question, verify the version your distribution actually supplies, and test the metrics and integrations you will rely on. None of these tools is supported by the available evidence as a universal performance or usability champion.
Quick Recap
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