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POFinding and replacing many words
 

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    <p>I frequently need to make many replacements within files. To solve this problem, I have created two files <code>old.text</code> and <code>new.text</code>. The first contains a list of words which must be found. The second contains the list of words which should replace those.</p> <ul> <li>All of my files use UTF-8 and make use of various languages.</li> </ul> <p>I have built this script, which I hoped could do the replacement. First, it reads <code>old.text</code> one line at a time, then replaces the words at that line in input.txt with the corresponding words from the <code>new.text</code> file.</p> <pre><code>#!/bin/sh number=1 while read linefromoldwords do echo $linefromoldwords linefromnewwords=$(sed -n '$numberp' new.text) awk '{gsub(/$linefromoldwords/,$linefromnewwords);print}' input.txt &gt;&gt; output.txt number=$number+1 echo $number done &lt; old.text </code></pre> <p>However, my solution does not work well. When I run the script:</p> <ul> <li>On line 6, the <code>sed</code> command does not know where the <code>$number</code> ends.</li> <li>The <code>$number</code> variable is changing to "0+1", then "0+1+1", when it should change to "1", then "2".</li> <li>The line with <code>awk</code> does not appear to be doing anything more than copying the input.txt exactly as is to output.txt.</li> </ul> <p>Do you have any suggestions?</p> <p>Update:</p> <p>The marked answer works well, however, I use this script a lot and it takes many hours to finish. So I offer a bounty for a solution which can complete these replacements much quicker. A solution in BASH, Perl, or Python 2 will be okay, provided it is still UTF-8 compatible. If you think some other solution using other software commonly available on Linux systems would be faster, then that might be fine too, so long as huge dependencies are not required.</p>
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    1. CODid you consider using `sed` ?
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      1. USBasile Starynkevitch
    2. COI have updated the script. `sed -i "s/ $i / $j /g" ./main.file` - Added space in this action. Let me know if it doesn't work and we can look further.
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      1. USjaypal singh
    3. COHave you tried merging the two files and making it as your sed script file?
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