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This is the input:


and I need this output:



So I used a:

echo -e 'asdfZE3033141xycf\nasdfINSFRHxycf' | sed '/asdfZE3033141xycf/ s=xycf$=\n='

but I need this in GENERAL. So I need to sed every:


line in a textfile. I just can't put the "[0-9]" in sed. How can I do this?

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3 Answers 3

up vote 1 down vote accepted

Why do not modify your work a little bit:

echo -e 'asdfZE3033141xycf\nasdfINSFRHxycf' | sed -e 's/^\(asdfZE[0-9]\{7\}\)xycf$/\1\n/'
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What's wrong with "[0-9]"? Why you can't put it in sed?

Use can simply use

sed '/asdfZE[0-9][0-9][0-9][0-9][0-9][0-9][0-9]xycf/s=xycf$=\n=' file

or even

sed '/asdfZE[0-9]\{7\}xycf/s=xycf$=\n=' file

sed support regex in search pattern.

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Not sure what you mean.

What about:

sed 's/^\(asdfZE[0-9]\{7\}\)xycf$/\1\

? (backslash followed by a real newline character is the standard way to insert a newline character on the right hand side of the s command (as opposed to \n)).

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I'm sorry, could you please decrypt RHS abbreviate? – rush Mar 13 '13 at 12:22
@rush. RHS == Right Hand Side. Now expanded. – Stéphane Chazelas Mar 13 '13 at 13:14

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