1htop(1) Utils htop(1)
2
6 htop - interactive process viewer
7
9 htop
10
12 This program is a free (GPL) ncurses-based process viewer.
13 It is similar to top, but allows to scroll the list vertically and hor‐
15 izontally to see all processes and their full command lines.
16 Tasks related to processes (killing, renicing) can be done without
18 entering their PIDs.
19
21 The following flags are supported:
22 -d DELAY
24 Delay between updates, in tenths of seconds
25 -u USERNAME
27 Show only processes of a given user
28 --sort-key COLUMN
30 Sort by this column (use --sort-key help for a column list)
31
33 The following commands are supported:
34 Arrows, PgUP, PgDn, Home, End
36 Scroll process list.
37 Space
39 "Tag": mark a process. Commands that can operate on multiple pro‐
40 cesses, like "kill", will then apply over the list of tagged pro‐
41 cesses, instead of the currently highlighted one.
42 U "Untag" all processes (remove all tags added with the Space key).
44 s Trace process system calls: if strace(1) is installed, pressing
46 this key will attach it to the currently selected process, pre‐
47 senting a live update of system calls issued by the process.
48 l Display open files for a process: if lsof(1) is installed, press‐
50 ing this key will display the list of file descriptors opened by
51 the process.
52 F1, h
54 Help screen
55 F2, S
57 Setup screen. There you can configure meters displayed on the top
58 side of the screen, as well as set various display options, choose
59 among color schemes and select the layout of the displayed col‐
60 umns.
61 F3, /
63 Incremental process search: type in part of a process command line
64 and the selection highlight will be moved to it. While in search
65 mode, pressing this key will cycle through matching occurrences.
66 F4, I
68 Invert sort order: if sort order is increasing, switch to decreas‐
69 ing, and vice-versa.
70 F5, t
72 Tree view: organize processes by parenthood, and layout the rela‐
73 tions between them as a tree. Toggling the key will switch between
74 tree and your previously selected sort view. Selecting a sort view
75 will exit tree view.
76 F6, >
78 Select field for sorting. The sort field is indicated by a high‐
79 light in the header.
80 F7, ], -
82 Increase selected process priority (subtract from 'nice' value).
83 This can be done by the superuser only.
84 F8, [, +
86 Decrease selected process priority (add to 'nice' value)
87 F9, k
89 "Kill" process: sends a signal which is selected in a menu, to one
90 or a group of processes. If processes were tagged, sends the sig‐
91 nal to all tagged processes. If none is tagged, sends to the cur‐
92 rently selected process.
93 F10, q
95 Quit
96 a (on multiprocessor machines)
98 Set CPU affinity: mark which CPUs a process is allowed to use.
99 u Show only processes owned by a specified user.
101 M Sort by memory usage (top compatibility key).
103 P Sort by processor usage (top compatibility key).
105 T Sort by time (top compatibility key).
107 F "Follow" process: if the sort order causes the currently selected
109 process to move in the list, make the selection bar follow it.
110 This is useful for monitoring a process: this way, you can keep a
111 process always visible on screen. When a movement key is used,
112 "follow" loses effect.
113 K Hide kernel threads: prevent the threads belonging the kernel to
115 be displayed in the process list. (This is a toggle key.)
116 H Hide user threads: on systems that represent them differently than
118 ordinary processes (such as recent NPTL-based systems), this can
119 hide threads from userspace processes in the process list. (This
120 is a toggle key.)
121 Ctrl-L
123 Refresh: redraw screen and recalculate values.
124 Numbers
126 PID search: type in process ID and the selection highlight will be
127 moved to it.
128
131 htop is developed by Hisham Muhammad <loderunner@users.source‐
132 forge.net>.
133 This man page was written by Bartosz Fenski <fenio@o2.pl> for the
134 Debian GNU/Linux distribution (but it may be used by others), and
135 updated by Hisham Muhammad.
136Bartosz Fenski <fenio@o2.pl> 0.8.3 htop(1)