kdevelop: 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/kdevelop - from package: kdevelop

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

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