guile-tools: 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/guile-tools - from package: guile

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

On Debian possible default full paths are:

/usr/bin/guile-tools - from package: guile-1.8-dev
/usr/bin/guile-tools - from package: guile-2.0-dev

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

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