bookman: 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 CentOS possible default full paths are:

/usr/bin/bookman - from package: txt2man

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/bookman - from package: txt2man

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

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