faxwatch: 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/sbin/faxwatch - from package: hylafax+-client

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

On Debian possible default full paths are:

/usr/sbin/faxwatch - from package: hylafax-server

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

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