scsi_logging_level: 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/bin/scsi_logging_level - from package: sg3-utils

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

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