aeimport: 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/aeimport - from package: aegis

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