genctd: 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/genctd - from package: icu

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

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