xtotroff: 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/xtotroff - from package: groff

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

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