pyqi: 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/pyqi - from package: pyqi

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

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