Put char with sed

put char on position X with sed
 
put space on position 5
echo 1234567 | sed 's/./& /5'

put . on position 5
echo 1234567 | sed 's/./&./5'
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Ubuntu Unsupported upgrades

 Unsupported upgrades Sometimes do-release-upgrade isn't able to run the upgrade to the latest version and it shows an error similar t...

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