faxspool: 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/faxspool - from package: mgetty-sendfax

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

On Debian possible default full paths are:

/usr/bin/faxspool - from package: mgetty-fax

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

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