cakephp-instaweb: command not found

Have You tried accessing the binary with the full path?

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/cakephp-instaweb - from package: cakephp-instaweb

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