dacsversion: 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/dacsversion - from package: dacs

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

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