faxrcvd: 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:

/var/spool/hylafax/bin/faxrcvd - from package: hylafax+

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

On Debian possible default full paths are:

/var/spool/hylafax/bin/faxrcvd - from package: hylafax-server

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

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