named-checkzone: 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/named-checkzone - from package: bind

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

On Debian possible default full paths are:

/usr/sbin/named-checkzone - from package: bind9utils

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

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