abootimg: 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/abootimg - from package: abootimg

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

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