time(1) General Commands Manual time(1) time - time [ ...] [ ...] time . time . (1) (2) ( tms_utime tms_cutime struct tms times(2)) (3) ( tms_stime tms_cstime struct tms times(2)). : ( bash(1)) time . ( /usr/bin/time). -p POSIX "real %f\nuser %f\nsys %f\n" ( ) %f . . 127 126 (1-125) . LANG LC_ALL LC_CTYPE LC_MESSAGES LC_NUMERIC NLSPATH . PATH . (GNU) 1.7 time. / (I/O) IPC ( ). -f TIME. : %Uuser %Ssystem %Eelapsed %PCPU (%Xtext+%Ddata %Mmax)k %Iinputs+%Ooutputs (%Fmajor+%Rminor)pagefaults %Wswaps -p (): real %e user %U sys %S printf(3). 0 \ %% % . time . . tcsh(1) . %E ( [:]:). %e ( tcsh(1).) (). %S . %U . %P (%U + %S) / %E. %M . %t ( tcsh(1).) . %K (++) . %D . %p ( tcsh(1).) . %X . %Z ( tcsh(1).) . . %F . . %R . . . %W . %c ( ). %w : /. / (I/O) %I . %O . %r (socket) . %s (socket) . %k . %C ( tcsh(1).) . %x ( tcsh(1).) . (GNU) -f --format= TIME. -p, --portability . -o --output= stderr . -a, --append ( -o.) . -v, --verbose . -q --quiet ( ) . (GNU) --help . -V --version , . -- . UNIX . 4.2 4.3BSD. time 1.7 . POSIX. TIME . autoconf(1) make(1) . MORE TIME ( ) . -o . ( -a ). time bug-time@gnu.org. time time --version C . bash(1) tcsh(1) times(2) wait3(2) 3 . . : . 6.18 8 2026 time(1)