atop as a Linux alternative to Process Monitor
Updated
Our verdict
atop is a solid alternative for system-level performance monitoring, not a direct one-to-one replacement for Process Monitor. It excels at tracking CPU, memory, and disk I/O per process over time, which covers half of Process Monitor's use cases. However, it lacks real-time file path and registry access logging. If you need to debug why a specific file is locked or trace registry writes, atop will fail. It is best for users who primarily need to identify resource hogs and analyze historical system load, rather than those doing deep forensic tracing of file system events.
- License
- GPL-2.0
- Price
- Free
- Latest version
- 2.13.0
- Rating
- —
What works the same
- Real-time per-process resource monitoring (CPU, memory, disk).
- Historical logging for later analysis.
- Command-line interface for power users.
- Low overhead during continuous monitoring.
- Exportable data for further processing.
What is different
- No real-time file path or directory access tracing.
- No registry or configuration file access logging.
- Focuses on aggregated resource usage rather than individual system calls.
- Lacks granular filtering by specific file paths or handles.
- Does not track process creation/termination events in the same detailed forensic manner.
Opening your Process Monitor files
atop does not read or write Process Monitor (PML) files. Its native log format is binary and specific to the atop daemon. You can export CSV data from atop, but this will not contain the file/registry event data found in PML files. If you have existing PML logs, you cannot open them in atop; you must use Process Explorer or Sysinternals tools on Windows to view them.
Switching from Process Monitor to atop, step by step
- Install atop via your package manager (e.g., 'sudo apt install atop').
- Start the atop daemon to begin background logging.
- Run 'atop' in a terminal to view real-time statistics.
- Use 'atop -r /var/log/atop/atop_YYYYMMDD' to analyze historical data.
- Use 'atop -b' to export selected data to CSV for external analysis.
Key features of atop
- Real‑time per‑process CPU, memory, disk and network stats
- Periodic logging to /var/log/atop for later analysis
- Aggregated view of kernel threads and system totals
- Customizable sampling interval
- Supports highlighting of high‑resource tasks
- Command‑line navigation with simple keystrokes
- Exportable CSV output via -b flag
- Works over SSH without X
How to install atop on Linux
sudo apt install atopsudo apt install atopsudo dnf install atopsudo pacman -S atopsudo zypper install atopFrequently asked questions
Can atop show which process opened a specific file?
No. atop shows disk I/O rates per process but does not log the specific file paths accessed. For that, you need a tool like inotifywait or auditd.
Is atop suitable for debugging application crashes?
Partially. It helps identify if a process was consuming excessive memory or CPU before a crash, but it won't show the file or registry operations that might have triggered the failure.
Does atop work on all Linux distributions?
It is available in major distributions including Debian, Ubuntu, Fedora, Arch, and openSUSE. It is a standard package in most repositories.