How to remove certain part of files with some conditions, sed or awk? -

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Hello I am very new at the AWK or SED.

But here I need it.

I have dozens of files, including

Do I need to find all the files together with this sn Ways to use awk or sed?

Can anyone do the light, thanks in advance.

Using GNU awk for multi-style RS: 

  $ Cat file is now winter & lt; Li & gt; & Lt; A class = "btn btn-success btn-xs btn-circle" style = "width: 10px; height: 12px;" & Gt; & Lt; / A & gt; Our dissatisfaction online

. 

  $ cat rmv & lt; Li & gt; & Lt; A class = "btn btn-success btn-xs btn-circle" style = "width: 10px; height: 12px;" & Gt; & Lt; / A & gt; Online

. 

  $ awk -v RS = '^ $' -v ORS = 'NR == FNR {str = $ 0; Next} s = index ($ 0, str) {$ 0 = substr ($ 0,1, s-1) substr ($ 0, s + length)) 1 'RMV file is now winter of our dissatisfaction < / Code>

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