kiwi-ui-test: command not found

Have You tried accessing the binary with the full path?

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/kiwi-ui-test - from package: python-kiwi

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