gwenhywfar-config: 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/gwenhywfar-config - from package: gwenhywfar-devel

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

On Debian possible default full paths are:

/usr/bin/gwenhywfar-config - from package: libgwenhywfar60-dev

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

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