dasdload: 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/dasdload - from package: hercules

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

On Debian possible default full paths are:

/usr/bin/dasdload - from package: hercules

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

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