aefind: command not found

Have You tried accessing the binary with the full path?

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/aefind - from package: aegis

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