I have a text file:
a b n
d f h
e f y
I want to edit it and make it like:
a [email protected] n
d [email protected] h
e [email protected] y
How can I do this? Is there any command which can help?
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3 Answers
Try this awk one liner:
$ awk '$2=$2"@gmail.com"' file
a [email protected] n
d [email protected] h
e [email protected] y
1 Comment
Ed Morton
+1 The funny thing is some people will look at how simple this is and how complicated the sed alternative is and then choose the sed command anyway because some versions of sed support
-i. Sigh.... Anyway - newer versions of gawk support -i inedit to change the original file too if that's a consideration.Using sed inline:
sed -i.bak 's/\(^[^ ]* *\)\([^ ]*\)\(.*\)$/\1\[email protected]\3/' file
This will save the changes in the original file itself.
4 Comments
ALBI
please explain the regular expression
anubhava
[^ ]* means match anything except a space and .* means any 0 or more length text.
Chris Seymour
sed -r 's/^\S+\s+\S+/&@gmail.com/' file is more readable and robust (GNU sed).
William Pursell
This does not make the changes in the original file. It creates a new file and then gives it the same name as the original. This is a significant distinction if the original file has other links. It is also not valid in all implementations of
sed.This might work for you (GNU sed):
sed -i 's/\S\+/&@gmail.com/2' file
