ctop

A lightweight system resource monitor for Linux and macOS, written in C and inspired by btop++.

Features

• CPU monitoring - Per-core and overall usage with history graphs
• Memory monitoring - Used, available, and total memory
• Disk I/O - Read/write speeds and usage per disk
• Network monitoring - Upload/download speeds with history
• Process list - Sortable process view with CPU and memory usage
• Battery status - Current charge level (when available)

Requirements

• GCC or Clang compiler
• GNU Make
• Linux or macOS
• termbox2 (vendored in repository)

Building

make              # Build the binary
make debug        # Build with debug symbols
make clean        # Remove compiled binary

Installing

make install         # Install to /usr/local/bin/
make PREFIX=/opt install  # Install to /opt/bin/
make uninstall       # Remove from installation directory

Usage

./ctop           # Run the monitor

Keyboard Shortcuts

Key	Action
1 - 5	Toggle CPU, Memory, Disks, Network, Processes panes
Ctrl+F	Cycle sort mode forward
Ctrl+B	Cycle sort mode backward
Arrow Up/Down or Ctrl+P/Ctrl+N	Navigate process list
Page Up/Down or Ctrl+V/Alt+v	Jump 10 processes up/down
Home or Ctrl+A	Jump to first process
End or Ctrl+E	Jump to last process
q / Q / Esc / Ctrl+C	Quit

License

GPL-3.0 - See LICENSE file.

ctop includes termbox2 (MIT licensed) as a vendored dependency.