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'

Create pem certificate

 Creating a .pem with the Private Key and Entire Trust Chain     Log into your DigiCert Management Console and download your Intermediate (D...

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