tinydns-get: 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/tinydns-get - from package: ndjbdns

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

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