owread: 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/owread - from package: ow-shell

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

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