perldl: 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/perldl - from package: perl-PDL

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

On Debian possible default full paths are:

/usr/bin/perldl - from package: pdl

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

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