hocr2djvused: 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/hocr2djvused - from package: ocrodjvu

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

Error in other languages:
hocr2djvused: bevel nie gevind nie
hocr2djvused: comandă negăsită
hocr2djvused: comando não encontrado
hocr2djvused: commande introuvable
hocr2djvused: command not found
hocr2djvused: käsku ei ole
hocr2djvused: không tìm thấy lệnh
hocr2djvused: komanda nerasta
hocr2djvused: Kommando nicht gefunden.
hocr2djvused: kommandot finns inte
hocr2djvused: komut yok
hocr2djvused: nie znaleziono polecenia
hocr2djvused: níor aimsíodh an t-ordú
hocr2djvused: no se encontró la orden
hocr2djvused: no s'ha trobat l'ordre
hocr2djvused: opdracht niet gevonden
hocr2djvused: parancs nem található
hocr2djvused: perintah tidak ditemukan
hocr2djvused: príkaz nenájdený
hocr2djvused: příkaz nenalezen
hocr2djvused: команда не найдена
hocr2djvused: командата не е открита
hocr2djvused: 命令找不到
hocr2djvused: コマンドが見つかりません