ebook2cw: 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/ebook2cw - from package: ebook2cw

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

Error in other languages:
ebook2cw: bevel nie gevind nie
ebook2cw: comandă negăsită
ebook2cw: comando não encontrado
ebook2cw: commande introuvable
ebook2cw: command not found
ebook2cw: käsku ei ole
ebook2cw: không tìm thấy lệnh
ebook2cw: komanda nerasta
ebook2cw: Kommando nicht gefunden.
ebook2cw: kommandot finns inte
ebook2cw: komut yok
ebook2cw: nie znaleziono polecenia
ebook2cw: níor aimsíodh an t-ordú
ebook2cw: no se encontró la orden
ebook2cw: no s'ha trobat l'ordre
ebook2cw: opdracht niet gevonden
ebook2cw: parancs nem található
ebook2cw: perintah tidak ditemukan
ebook2cw: príkaz nenájdený
ebook2cw: příkaz nenalezen
ebook2cw: команда не найдена
ebook2cw: командата не е открита
ebook2cw: 命令找不到
ebook2cw: コマンドが見つかりません