multitee: 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/multitee - from package: multitee

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

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