append message to tee

Question

is there any way to add the current date when using tee? For example:

ls -al | tee someFile.txt

prints something along these lines:

== 23.10.2014 - 23:23:23 ==
...
Whatever the ls returned
...

It has to be done as a single command. Thanks!

score 1 · Answer 1 · answered Jul 28 '20 at 11:53

1

For any command:

<command> | tee -a <filename>

OR

<command> | tee --append <filename>

answered Jul 28 '20 at 11:53

Yakir GIladi Edry

score 0 · Accepted Answer · answered Oct 23 '14 at 20:33

0

It looks like what you're actually asking for is prepending, not appending.

{ echo "some prefix"; ls -al; } | tee someFile.txt

If you wanted to append a message, though, the syntax is exactly what you'd expect given the above:

{ ls -al; echo "some suffix"; } | tee someFile.txt

answered Oct 23 '14 at 20:33

Charles Duffy

You are right I meant prepend. although it doesn't fully solve my problem, your answer is correct for the case I explained. I have opened a new question [here](http://stackoverflow.com/questions/26542882/prepend-message-to-rsstail) to solve my problem. Thanks! – ruben1691 Oct 24 '14 at 06:55

2 Answers2