ceres-node-write: 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 Debian possible default full paths are:

/usr/bin/ceres-node-write - from package: python-ceres

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

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