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btop

btop是一个交互式终端资源监视器，以丰富的TUI显示CPU、内存、磁盘、网络和进程统计信息。对于希望在不离开终端的情况下获得基于图形的视图和支持鼠标操作的用户来说，它可以替代htop。触发词包括：'btop'、'进程监视器'、'资源监视器'、'系统监视器TUI'、'cpu使用率tui'、'htop替代品'、'bpytop'、'bashtop'。

person作者: jakexiaohubgithub
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Identity

| Property | Value | |----------|-------| | Binary | btop | | Config | ~/.config/btop/btop.conf (auto-created on first run) | | Logs | No persistent logs — output to terminal | | Type | Interactive terminal UI | | Install | apt install btop (Debian/Ubuntu 22.04+) / dnf install btop (RHEL/Fedora) |

Key Operations

| Task | Command | |------|---------| | Launch | btop | | Quit | q or Ctrl+C | | Help overlay | ? | | Toggle process tree | e | | Kill signal menu | k (opens signal selector for selected process) | | Filter processes | f then type filter string; Esc to clear | | Sort columns | Click column header (mouse) or left/right arrows | | Change graph type | t cycles through graph styles | | Network stats | Always visible in net box; n toggles net box focus | | Disk I/O | Always visible in disk box; d toggles disk box | | Per-core CPU view | 1 toggles single-core vs aggregate CPU view | | Toggle mouse support | m | | Open options menu | o | | Jump to next box | Tab |

Common Failures

| Symptom | Cause | Fix | |---------|-------|-----| | btop: command not found | Not installed or not in PATH | apt install btop or dnf install btop; snap installs land in /snap/bin/ | | Mouse clicks not registering | Terminal emulator or SSH session doesn't forward mouse events | Press m to confirm mouse mode is on; try a different terminal or btop --utf-force | | Colors look wrong / monochrome | Terminal doesn't support 256 colors | Set TERM=xterm-256color before launching; check echo $COLORTERM | | Snap-installed btop can't find config | Config location differs under snap confinement | Config is at ~/snap/btop/current/.config/btop/btop.conf instead of ~/.config/btop/ | | Kill confirmation doesn't respond | Mouse mode disabled; keyboard required | Use arrow keys to select signal, Enter to confirm, Esc to cancel | | Battery widget missing | No battery present (desktop/server) | This is expected — the battery box only appears on systems that report a battery | | High CPU from btop itself | Refresh interval too low | Press o → increase update_ms (default 2000 ms is fine; 500 ms causes noticeable load) |

Pain Points

  • Mouse support not available in all terminals: some terminal emulators or SSH multiplexers (screen, older tmux configs) don't pass mouse events. Toggle with m to verify; fall back to keyboard nav.
  • 256-color requirement: btop's default theme needs a 256-color terminal. On minimal servers, TERM may be set to xterm (8 colors) — set TERM=xterm-256color to fix rendering.
  • Snap config path diverges: when installed via snap, btop runs in a confined namespace and writes config to ~/snap/btop/current/.config/btop/btop.conf. Editing ~/.config/btop/btop.conf has no effect on the snap build.
  • Kill requires confirmation dialog: unlike htop's direct F9 → signal flow, btop opens a modal dialog. This is intentional but slower under keyboard-only navigation.
  • Battery widget only appears on laptops: the battery section is entirely absent on desktops and servers — this is not a bug or config issue.
  • No regex in process filter: the f filter does substring matching only. For pattern-based filtering, pipe ps or pgrep output externally instead.

References

See references/ for:

  • cheatsheet.md — 10 task-organized patterns
  • docs.md — official documentation links