scsieject: 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/sbin/scsieject - from package: mtx

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

On Debian possible default full paths are:

/usr/sbin/scsieject - from package: mtx

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

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