asl: 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/asl - from package: asl

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

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