remctld: 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/remctld - from package: remctl

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

On Debian possible default full paths are:

/usr/sbin/remctld - from package: remctl-server

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

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