rollrec-editor: 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/rollrec-editor - from package: dnssec-tools

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

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