webxref: 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
/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/webxref - from package: libaws-bin

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