getdap: 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 CentOS possible default full paths are:

/usr/bin/getdap - from package: libdap

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/getdap - from package: libdap-bin

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

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