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