bookview: 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

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/bookview - from package: bookview

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