night_control: 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/night_control - from package: nightview-cli

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

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