coin-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/coin-config - from package: Coin2-devel

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

On Debian possible default full paths are:

/usr/bin/coin-config - from package: libcoin80-dev

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

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