pod_cover: 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/pod_cover - from package: perl-Pod-Coverage

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

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