HTOP(1) User Commands HTOP(1) (NAME) pcp-htop - (SYNOPSIS) htop [-dCFhpustvH] pcp-htop [-dCFhpustvH] [--host/-h host] (DESCRIPTION) htop ncurses . top () . . ( renice) PID . pcp-htop htop Performance Co-Pilot (PCP) ( PCPIntro(1) PMAPI(3)) htop . CONFIG FILES . (COMMAND-LINE OPTIONS) . -d --delay=DELAY . / . . -C --no-color --no-colour htop ( ) -F --filter=FILTER . ( ) . "|" . --no-function-bar -h --help -p --pid=PID,PID... PID -s --sort-key COLUMN ( --sort-key help ). -t . . -u --user[=USERNAME|UID] -U --no-unicode ASCII -M --no-mouse --no-meters --readonly -V --version -t --tree[=MODE] . -s . MODE (0/classic 1/soft/stable 2/hard/STABLE) . soft PID . hard . -H --highlight-changes=DELAY --drop-capabilities[=off|basic|strict] libcap . (capabilities) . strict ..SH " (INTERACTIVE COMMANDS)" htop : Tab, Shift-Tab (tab) / . (Setup F2) . Up, Alt-k () . . Down, Alt-j () . . Left, Alt-h . Right, Alt-l . PgUp, PgDn . Home . End . Ctrl-A, ^ ( ). Ctrl-E, $ ( ). Shift-Up, Alt-Up . Shift-Up (scrollback) . htop . Shift-Down, Alt-Down . Shift-Down (scrollback) . htop . Space . "kill" . c . "kill" . U ( Space c). s : strace(1) . l : lsof(1) (file descriptors) . w . x . F1, h, ? . F2, S (setup) . F3, / . () . F3 . Shift-F3 . . F4,  : . Filter Esc . . ( regex). "|" . F5, t : - . . . F6, <, > < > . . F7, ] ( 'nice'). (superuser) . F8, [ ( 'nice'). Shift-F7, } autogroup ( 'nice' autogroup). (superuser) . Shift-F8, { autogroup ( 'nice' autogroup). F9, k ("Kill") : . . . F10, q . I : . +, -, * . "+" . "*" PID PID 1 (init) PID 2 (kthreadd ) . a (on multiprocessor machines) (CPU affinity): . u . N PID. M ( top). P ( top). T ( top). F << >> ("Follow") : . : . (sticky follow) . Shift Alt Up Down . ( ) Shift+F . Up Down PgUp PgDn Shift+Up Shift+Down . K (kernel threads): . ( .) H (user threads): ( NPTL) . ( .).TP O : . ( .) p . ( .) Z / . m exe comm cmdline . ( .) b backtrace . ( .) Ctrl-L : . Numbers PID: . (COLUMNS) . '-' htop . "Available Columns" . htop . Command ( ). 'Merge exe, comm and cmdline in Command' ( 'm' ) (/proc/[pid]/exe) (/proc/[pid]/comm) . basename . (stale) ( EXE ). Command . : o : o : o : COMM /proc/[pid]/comm . 2.6.33 . EXE (basename) /proc/[pid]/exe . htop CAP_SYS_PTRACE (root) . basename . /proc/[pid]/exe . basename . /proc/[pid]/maps . . . "Display Options" . EXE CAP_SYS_PTRACE PTRACE_MODE_READ_FSCRED . PID . STATE (S) : S (sleeping) I (idle - ) R (running) D () Z ( ) T ( SIGTSTP) W (paging) PPID . PGRP . SESSION (SID) . TTY . TPGID . MINFLT (page faults) . CMINFLT ( MINFLT ). MAJFLT (page faults) . CMAJFLT ( MAJFLT ). UTIME (UTIME+) (user CPU time) ( ) CPU (clock ticks) . STIME (STIME+) (system CPU time) . CUTIME (CUTIME+) ( UTIME ). CSTIME (CSTIME+) ( STIME ). PRIORITY (PRI) nice . (real-time) . NICE (NI) nice 19 ( ) -20 ( ). . . STARTTIME (START) . PROCESSOR (CPU) . M_VIRT (VIRT) . M_RESIDENT (RES) resident set size ( text + data + stack) ( ). M_SHARE (SHR) . M_PRIV (PRIV) ( ). M_TRS (CODE) (text resident set size) ( ). M_DRS (DATA) (data resident set size data + stack) ( )..TP M_LRS (LIB) . M_SWAP (SWAP) . M_PSS (PSS) (Proportional Set Size) M_RESIDENT . M_M_PSSWP (PSSWP) M_SWAP shmem . M_EPSS (EPSS) - . M_PSSWP shmem . ST_UID (UID) (UID) . PERCENT_CPU (CPU%) (CPU) . CPU Linux . . << Irix>> top(1). PERCENT_NORM_CPU (NCPU%) CPU CPU. << Solaris>> top(1). PERCENT_MEM (MEM%) ( M_RESIDENT ). USER . Linux (file capabilities) Linux ambient root . : o : o : o (): TIME (TIME+) (clock ticks) (UTIME STIME ). NLWP (Light-Weight Processes ) . TGID (Thread Group ID). RCHAR (RD_CHAR) . WCHAR (WR_CHAR) . SYSCR (RD_SYSC) read(2) . SYSCW (WR_SYSC) write(2) . RBYTES (IO_RBYTES) / (I/O) read(2) . WBYTES (IO_WBYTES) / (I/O) write(2) . CNCLWB (IO_CANCEL) / write(2). IO_READ_RATE (DISK READ) / read(2) . IO_WRITE_RATE (DISK WRITE) / write(2) . IO_RATE (DISK R/W) / IO_READ_RATE + IO_WRITE_RATE ( ). CGROUP cgroup . CCGROUP . CCGROUP cgroup . . /*.slice /[*] ( ) /system.slice /[S] /user.slice /[U] /user-*.slice /[U:*] (/[U] ) /machine.slice /[M] /machine-*.scope /[SNC:*] (SNC: systemd nspawn) /lxc.monitor.* /[LXC:*] /lxc.payload.* /[lxc:*] /*.scope /!* /*.service /* ( ) ( systemd) cgroup . OOM OOM killer. CTXT (context switches) . IO_PRIORITY (IO) I/O : R (Realtime) B (Best-effort) id (Idle) PERCENT_CPU_DELAY (CPUD%) CPU ( ). CAP_NET_ADMIN . PERCENT_IO_DELAY (IOD%) / (synchronous block I/O). CAP_NET_ADMIN . PERCENT_SWAP_DELAY (SWAPD%) (swapping in). CAP_NET_ADMIN . AGRP autogroup . Linux CFS . ANI nice autogroup . Linux CFS . (All other flags) ( '-' )..SH " (EXTERNAL LIBRARIES)" htop . htop . : libsystemd libsystemd SystemD . systemd . : libsystemd (fallback) systemctl(1). libsensors libsensors CPU . htop libsensors coretemp 0 "Core 0" . (package) "Package id 0" . . : C libsensors(3) libsensors(3) . libnl-3 / libnl-genl-3 libnl-3 libnl-genl-3 ( Netlink) (delay accounting) delay accounting ( PERCENT_CPU_DELAY PERCENT_IO_DELAY PERCENT_SWAP_DELAY) . --enable-delayacct . : C libnl-3 libnl-genl-3 ( --enable-delayacct) libnl-3-200 libnl-genl-3-200 . (CONFIG FILES) htop XDG ~/.config/htop/htoprc . (Setup) htop . htop /etc/pcp/htoprc . $HTOPRC ( ). pcp-htop htoprc . pcp-htop Performance Co- Pilot ~/.pcp/htop/htoprc htop pcp-htop . pcp-htop Setup ( F2) . (Available Meters) (Available Column) . pcp-htop . pcp-htop(5) . Performance Co-Pilot pcp-htop . OpenMetrics https://openmetrics.io pmdaopenmetrics(1) pcp-htop . htop pcp-htop . ..SH (MEMORY SIZES) htop . IEC . K KiB ( KiB = ) . htop ( KiB ) . (SEE ALSO) proc(5), top(1), free(1), ps(1), uptime(1) limits.conf(5). PCP (SEE ALSO FOR PCP) pmdaopenmetrics(1), PCPIntro(1), PMAPI(3), pcp-htop(5). (AUTHORS) htop Hisham Muhammad . . pcp-htop Performance Co-Pilot . (COPYRIGHT) (C) 2004-2019 Hisham Muhammad. (C) 2020-2026 htop. GPLv2+: . : . . Performance Co-Pilot 2026 HTOP(1)