top ships everywhere and redraws a sorted process table every three seconds (Finding Resource Hogs reads its header); P, M and T sort, k kills, q quits. htop 386,022 (github.com/htop-dev/htop (https://github.com/htop-dev/htop 8,352 ), GPL-2.0) adds meter bars, scrolling, the mouse, full command lines, a tree and an action per function key. Ubuntu 26.04 225 ships 3.4.1; upstream released 3.5.3 on 16 August 2026. This frame, captured with tmux 49,533 capture-pane, shows two throwaway scripts: burn.php, an endless loop, and hog.php, holding 300 MB. On this 36-thread machine, F2 Setup swapped the per-core bars for an average meter.
Avg[||| 2.8%] Tasks: 66, 81 thr, 0 kthr; 2 running
Mem[|||| 1.55G/62.6G] Load average: 0.42 0.40 0.32
Swp[ 0K/16.0G] Uptime: 00:54:56
[Main] [I/O]
PID USER PRI NI VIRT RES SHR S CPU%▽MEM% TIME+ Command
9390 dev 20 0 112M 37172 28792 R 100.5 0.1 0:08.69 php /tmp/ch01-08/burn.php
377 mysql 20 0 2478M 471M 45688 S 0.7 0.7 0:06.89 /usr/sbin/mysqld
...
F1Help F2Setup F3SearchF4FilterF5Tree F6SortByF7Nice -F8Nice +F9Kill F10QuitCPU% is per core: 100.5 is one core pegged while the 36-core average reads 2.8%, so a runaway worker hides in the average.