changetrack: 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/changetrack - from package: changetrack

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

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