aot-compile: 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 Debian possible default full paths are:

/usr/bin/aot-compile - from package: libgcj-common

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

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