cpancover: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/cpancover - from package: perl-Devel-Cover

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/cpancover - from package: libdevel-cover-perl

You may install the required package with command apt-get install {package}

Error in other languages:
cpancover: bevel nie gevind nie
cpancover: comandă negăsită
cpancover: comando não encontrado
cpancover: commande introuvable
cpancover: command not found
cpancover: käsku ei ole
cpancover: không tìm thấy lệnh
cpancover: komanda nerasta
cpancover: Kommando nicht gefunden.
cpancover: kommandot finns inte
cpancover: komut yok
cpancover: nie znaleziono polecenia
cpancover: níor aimsíodh an t-ordú
cpancover: no se encontró la orden
cpancover: no s'ha trobat l'ordre
cpancover: opdracht niet gevonden
cpancover: parancs nem található
cpancover: perintah tidak ditemukan
cpancover: príkaz nenájdený
cpancover: příkaz nenalezen
cpancover: команда не найдена
cpancover: командата не е открита
cpancover: 命令找不到
cpancover: コマンドが見つかりません