tee(1) copies standard input to standard output as well as the
stee is silent tee and doesn’t copy to standard output
(well, it throws the output away).
What’s that good for, you may wonder? Well, it allows you to write
into a file without having to setup a shell direction (nor fiddle with
argument strings as with
dd of=...). This saves you an additional
layer of quoting:
% date | ssh localhost 'cat >/tmp/out' % date | ssh localhost stee /tmp/out
Also, an often overlooked feature of
tee is that it supports output
to multiple files.
stee of course does as well:
% fortune | stee a b c % sum a b c 51569 1 a 51569 1 b 51569 1 c # echo min_power | stee /sys/class/scsi_host/*/link_power_management_policy
(Of course, a good shell can do that already internally.)
NP: Die Schnitter—Klöne