sed substitue whole file + 1 substitue with variables on one sed line?.

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sed substitue whole file + 1 substitue with variables on one sed line?.

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sed - replace text with variable, shell scripts

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12-04-2016

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sed substitue whole file + 1 substitue with variables on one sed line?.

I'm trying to remove '--X' from the whole file and using variables replace $oldvar with $newvar.

I have tried with double quotes but it doesn't seem to work. $newvar is set to /usr/bin/bash. Would appreciate some guidance.

Code:

newvar=$(which bash)
oldvar=/bin/bash
  
sed "s/^--X//;1s#!$oldvar#!$newvar#" <infile >outfile

Input is:

Code:

echo $newvar
$ /usr/bin/bash

cat infile
--X#!/bin/bash

Result is:

Code:

#!/bin/bash

itman73

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12-04-2016

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Escape the \! or better yet, remove them.

Aia

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