Run as root for fuller visibility
See more processes and use privileged actions.
bashANYsudopermissions
bash
sudo htopNotes
On many systems, unprivileged users cannot fully inspect other users' processes.
Htop Troubleshooting and FAQ Recipes
Troubleshooting recipes for missing visibility, permission issues, terminal quirks, and common htop interpretation mistakes.
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Permissions and visibility
Fix common issues where htop does not show what you expect.
Check /proc hidepid settings
Determine whether procfs restrictions hide details.
bashANYprochidepidmount
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mount | grep ' on /proc 'Notes
Procfs mount options can restrict which process details are visible to non-root users.
Limit noise to your own processes
Use a user filter when system-wide lists are overwhelming.
bashANYuserfilter
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htop -u "$USER"Notes
Useful on busy shared boxes where you only need your workload.
Avoid accidental process changes
Use read-only mode in production troubleshooting.
bashANYreadonlyproduction
bash
htop --readonlyNotes
Prevents accidental renice or signal operations from the UI.
Terminal quirks and interpretation tips
Common issues with display behavior and reading htop output correctly.
Use monochrome when colors render poorly
Work around bad terminal color support.
bashANYcolorterminal
bash
htop -CNotes
Helpful in minimal terminals, serial consoles, or screenshot tooling.
Use a focused PID list in narrow terminals
Reduce clutter when columns wrap or truncate heavily.
bashANYpidterminal
bash
htop -p 1,"$(pgrep -d, -x sshd)"Notes
Targeted views are easier to read on small terminal windows.
Interpret CPU% carefully on multicore systems
One process can exceed 100% if it uses multiple cores.
textANYcpuinterpretation
text
A multithreaded process may show CPU% > 100 on multicore hosts.Notes
This is expected behavior when percentages are summed across cores.
Distinguish RES from VIRT
Resident memory and virtual size tell different stories.
textANYmemoryresvirt
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RES = resident RAM in use; VIRT = virtual address space reserved or mapped.Notes
Large VIRT values do not always mean equally large real memory pressure.
Pair htop with vmstat during swap pressure
Cross-check memory pressure with a textual system tool.
bashANYvmstatswap
bash
vmstat 1 10Notes
Helpful when you need a short rolling view of runnable tasks, swap, and CPU wait states.
More in htop
Htop Batch Alternatives, Exports, and Companion Commands
Practical command-line companions and non-interactive alternatives to htop for logs, scripts, and copyable output.
Htop Remote, Container, and Server Recipes
Common htop workflows for SSH sessions, containers, services, and production troubleshooting on Linux hosts.
Htop Config, Persistence, and Theming
Persist htop settings, edit configuration files, and manage practical theming and display preferences across sessions.
Htop Columns, Meters, Threads, and Display Options
Customize meters, visible columns, threads, kernel tasks, and display density for different monitoring scenarios.
Htop Process Actions, Signals, and Priority Changes
Use htop to renice, kill, tag, and inspect processes, including shortcuts for signals, strace, lsof, and affinity-related workflows.
Htop Navigation, Search, Filter, Sort, and Tree View
Interactive keys and workflows for moving around htop, searching processes, filtering by command, changing sort columns, and working in tree view.