.Dd January 23, 2015 .Dt TEE 1 .Os .Sh NAME .Nm tee .Nd duplicate stdin .Sh SYNOPSIS .Nm .Op Fl ai .Op Ar file ... .Sh DESCRIPTION .Nm writes from stdin to stdout and each .Ar file . .Sh OPTIONS .Bl -tag -width Ds .It Fl a Append to each .Ar file instead of overwriting it. .It Fl i Ignore SIGINT, see .Xr signal 7 . .El .Sh STANDARDS The .Nm utility is compliant with the .St -p1003.1-2008 specification.