saxonb-xquery: 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/saxonb-xquery - from package: libsaxonb-java

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

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