kdev-pg-qt: 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/kdev-pg-qt - from package: kdevelop-pg-qt

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

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