tinydns-edit: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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-edit - from package: ndjbdns

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