cloud-init-per: 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/cloud-init-per - from package: cloud-init

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

On Debian possible default full paths are:

/usr/bin/cloud-init-per - from package: cloud-init

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

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