time.1

操作系统设计与实现源码

.TH TIME 1
.SH NAME
time \- report how long a command takes
.SH SYNOPSIS
\fBtime \fIcommand\fR
.br
.de FL
.TP
\\fB\\$1\\fR
\\$2
..
.de EX
.TP 20
\\fB\\$1\\fR
# \\$2
..
.SH EXAMPLES
.EX "time a.out" "Report how long \fIa.out\fR takes"
.EX "time ls \-l *.c" "Report how long \fIls\fR takes"
.SH DESCRIPTION
.PP
The command is executed and the real time, user time, and system time (in
hours, minutes, and seconds) are printed.
Shell scripts cannot be timed.
.SH "SEE ALSO"
.BR times (2).