Shell Programming and Scripting

#!/bin/bash

for EN_file in *EN.html
do
        IT_file=$( echo "${EN_file}" | sed 's/_EN\.html/_IT\.html/g' )
        echo "${EN_file} ${IT_file}" >> output.txt
done

*EN.html *EN.html
*EN.html *EN.html
*EN.html *EN.html

#!/bin/bash

for EN_file in *.en.html
do
        IT_file=$( echo "${EN_file}" | sed 's/_\.en\.html/_\.it\.html/g' )
        echo "${EN_file} ${IT_file}" >> output.txt
done

#!/bin/bash

for EN_file in *en.html
do
        echo "${EN_file} ${EN_file/en.html/it.html}"
done > output.txt

#!/bin/bash

for EN_file in *en.html
do
        IT_file=$( echo ${EN_file/en.html/it.html} )
        [[ -f ${IT_file} ]] && echo "${EN_file} ${IT_file}" >> output.txt
done