astile: 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/astile - from package: libAfterImage-devel

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

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