dt-upgrade-0.7-db: 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/dt-upgrade-0.7-db - from package: ditrack

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

Error in other languages:
dt-upgrade-0.7-db: bevel nie gevind nie
dt-upgrade-0.7-db: comandă negăsită
dt-upgrade-0.7-db: comando não encontrado
dt-upgrade-0.7-db: commande introuvable
dt-upgrade-0.7-db: command not found
dt-upgrade-0.7-db: käsku ei ole
dt-upgrade-0.7-db: không tìm thấy lệnh
dt-upgrade-0.7-db: komanda nerasta
dt-upgrade-0.7-db: Kommando nicht gefunden.
dt-upgrade-0.7-db: kommandot finns inte
dt-upgrade-0.7-db: komut yok
dt-upgrade-0.7-db: nie znaleziono polecenia
dt-upgrade-0.7-db: níor aimsíodh an t-ordú
dt-upgrade-0.7-db: no se encontró la orden
dt-upgrade-0.7-db: no s'ha trobat l'ordre
dt-upgrade-0.7-db: opdracht niet gevonden
dt-upgrade-0.7-db: parancs nem található
dt-upgrade-0.7-db: perintah tidak ditemukan
dt-upgrade-0.7-db: príkaz nenájdený
dt-upgrade-0.7-db: příkaz nenalezen
dt-upgrade-0.7-db: команда не найдена
dt-upgrade-0.7-db: командата не е открита
dt-upgrade-0.7-db: 命令找不到
dt-upgrade-0.7-db: コマンドが見つかりません