acdc: 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/acdc - from package: emboss

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

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