supervisord: 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/supervisord - from package: supervisor

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

On Debian possible default full paths are:

/usr/bin/supervisord - from package: supervisor

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

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