ajc: 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/ajc - from package: aspectj

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

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