kali: 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/kali - from package: kali

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

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