ocrfeeder: 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/ocrfeeder - from package: ocrfeeder

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