UNIX for Dummies Questions & Answers

I am new to unix and lerning tru cygwin (unix simulation on windows)

i am trying to lern sed command and want to interchange first and second no in a string. What i mean is

i want gauri 1234 556 to gauri 556 1234

i am getting the following error


$ echo gauri 1234 556 | sed s/\([0-9]*\) \([0-9]*\)/\2 \1/
sed: -e expression #1, char 10: unterminated `s' command

echo gauri 1234 556 | sed 's/\([0-9][0-9]*\) \([0-9][0-9]*\)/\2 \1/'

Enclose the expression within single quotes.

vino

thanks a lot. Actually i was doing this mistake with all sed command..