libetpan-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/libetpan-config - from package: libetpan-devel

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

On Debian possible default full paths are:

/usr/bin/libetpan-config - from package: libetpan-dev

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

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