isc-hmac-fixup: 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/sbin/isc-hmac-fixup - from package: bind

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

On Debian possible default full paths are:

/usr/sbin/isc-hmac-fixup - from package: bind9

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

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