Geek Answers Handbook

How to map Linux command output to stdout and pass it to another command?

Possible duplicate:
How to connect stdout while keeping it on the screen? (not the output file)

For example, I want to run the command:

ls -l

Then I get the output in stdout:

 drwxr-xr-x 2 user user 4096 Apr 12 12:34 Desktop -rw-rw-r-- 1 user user 1234 Apr 12 00:00 file

And I want to redirect this output to another command for further processing (for example, redirecting to "head -1" to extract the first line). Can I do this in only one line?

+1
source share
2 answers

Yes, the tee will work. Sort of:

 ls -l | tee | head -1

To add output to a file:

 ls -l | tee -a output.txt
+3
source

There is a tool called tpipe that allows you to pass a command to two other commands (for example, fork) but is not installed by default on most machines. Using it, your problem will be solved with:

 ls -l | tpipe head -1
0
source

More articles:


All Articles