codechanges: 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/codechanges - from package: pmccabe

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

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