faxrunq: 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/faxrunq - from package: mgetty-sendfax

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

On Debian possible default full paths are:

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

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

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