acelib.mpb: 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"

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