Install libconvert-pem-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libconvert-pem-perl
Description:
Perl module for reading/writing encrypted ASN.1 PEM files
Convert::PEM reads/writes encrypted ASN.1 PEM files. The files can optionally be encrypted using a symmetric cipher algorithm, such as 3DES.
Homepage: https://metacpan.org/release/Convert-PEM
Version: 0.08-2
Section: universe/perl