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Question
In linux, use sed to insert the line "hello there" at the end (i.e. AFTER last line) of file, test.txt, where output is just sent to stdout.
Answer
sed -e '$a \
hello there' test.txt
^^ note the use of the $a syntax to insert after last line

Question
In linux, use sed to insert the line "hello there" at the end (i.e. AFTER last line) of file, test.txt, where output is just sent to stdout.
Answer
?

Question
In linux, use sed to insert the line "hello there" at the end (i.e. AFTER last line) of file, test.txt, where output is just sent to stdout.
Answer
sed -e '$a \
hello there' test.txt
^^ note the use of the $a syntax to insert after last line
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8. Streams and sed -- The Stream Editor
(or the end of the file if one does not exist). This behavior applies just as well to to insertions: sed -e '/Love Jane/i\ Love Carol\ Love Beth' Note that the $ symbol indicates the last line: <span>sed -e '$i\ The new second last line\ The new last line.' and finally, the negation symbol, ! , is used to match all lines not specified; for instance, sed -e '7,11!D' deletes all lines except line

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statusnot learnedmeasured difficulty37% [default]last interval [days]               
repetition number in this series0memorised on               scheduled repetition               
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