time(1) General Commands Manual time(1) (NAME) time - (SYNOPSIS) time [option ...] command [argument ...] (DESCRIPTION) time command . command time . () () ( tms_utime tms_cutime struct tms times(2) ) () ( tms_stime tms_cstime struct tms times(2) ) . : ( bash(1)) time . ( /usr/bin/time). (OPTIONS) -p POSIX : "real %f\nuser %f\nsys %f\n" ( ) %f . (EXIT STATUS) command command . command (-) . (ENVIRONMENT) LANG LC_ALL LC_CTYPE LC_MESSAGES LC_NUMERIC NLSPATH . PATH command . (GNU VERSION) . time . / IPC ( ) . -f TIME . : %Uuser %Ssystem %Eelapsed %PCPU (%Xtext+%Ddata %Mmax)k %Iinputs+%Ooutputs (%Fmajor+%Rminor)pagefaults %Wswaps -p () : real %e user %U sys %S (The format string) printf(3) . tab newline backslash \t \n \\ %% % . time . . tcsh(1) . %E ( [:]:). %e ( tcsh(1) .) ( ). %S CPU . %U CPU . %P (%U + %S) / %E. %M . %t ( tcsh(1) .) . %K (++) . %D . %p ( tcsh(1) .) . %X . %Z ( tcsh(1) .) . . %F . . %R . . . %W swap . %c ( ). %w : /. / %I . %O . %r . %s . %k . %C ( tcsh(1) .) . %x ( tcsh(1) .) . (GNU options) -f format, --format=format TIME . -p, --portability . -o file, --output=file stderr . -a, --append ( -o .) . -v, --verbose . -q, --quiet ( command ) . (GNU standard options) --help . -V, --version . -- . (BUGS) UNIX . 4.2 4.3BSD . . GNU time . POSIX . TIME . autoconf(1) make(1) . MORE TIME ( ) . -o . ( -a .) GNU time bug-time@gnu.org . time : time --version C . (SEE ALSO) bash(1), tcsh(1), times(2), wait3(2) Linux man-pages 6.19 2026-02-08 time(1)