Difference between revisions of "Echo"
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imported>ThorstenStaerk (Created page with "echo is a command to write something. By default this goes to stdout which by default goes to the console. Here is an example: tweedleburg:~ # echo "hello world" he...") |
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| − | echo is a [[command]] to write something. By default this goes to [[stdout]] which by default goes to the [ | + | echo is a [[command]] to write something. By default this goes to [[stdout]] which by default goes to the [http://simple.wikipedia.org/wiki/Command_Line_Interface console]. Here is an example: |
tweedleburg:~ # echo "hello world" | tweedleburg:~ # echo "hello world" | ||
hello world | hello world | ||
Revision as of 21:22, 17 December 2011
echo is a command to write something. By default this goes to stdout which by default goes to the console. Here is an example:
tweedleburg:~ # echo "hello world" hello world
you can also output variables:
tweedleburg:~ # export name="Linus" tweedleburg:~ # echo $name Linus
for more info on this, see shell programming. As with every program that outputs text, you can redirect the output to a file like this:
tweedleburg:~ # echo "hello world" > file tweedleburg:~ # cat file hello world
