setupcon: 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:

/bin/setupcon - from package: console-setup
/bin/setupcon - from package: console-setup-mini

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

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