run-on-ac: 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/run-on-ac - from package: tlp

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

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