ql-dynamic-tgt-lun-disc: 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 Debian possible default full paths are:

/usr/sbin/ql-dynamic-tgt-lun-disc - from package: qla-tools

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

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