accerciser: 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/accerciser - from package: accerciser

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

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