ekiga-config-tool: 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/ekiga-config-tool - from package: ekiga

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

On Debian possible default full paths are:

/usr/bin/ekiga-config-tool - from package: ekiga

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

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