wp-setup: 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/wp-setup - from package: wordpress

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

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