I want to replace the 1st column of the file with the last one. So for this file:
A B C D E F
the result would be:
F B C D E A
I've tried to do so:
awk '{$a = $1; $1 = $NF; $NF = $a; print }' myfile > secfile
but didn't work.
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5Try `a` instead of `$a`. – Wintermute May 21 '15 at 10:08
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I don't think this is a duplicate, since the OP knows how to do this. It is just that he missed what was the correct syntax. – fedorqui May 21 '15 at 12:33
2 Answers
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As Wintermute says in comments, you have to use a instead of $a:
awk '{a = $1; $1 = $NF; $NF = a; print }' myfile > secfile
^
no $a !
This is because variables in awk do not have leading $. The $x syntax is used to call the fields in the record, so that $x stands for the field on the position stored in the variable x.
fedorqui
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You may use sed.
sed 's/^\([^\s]*\)\(.*\s\)\([^\s]*\)$/\3\2\1/' file
Avinash Raj
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