radsqlrelay: 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/radsqlrelay - from package: freeradius-utils

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

On Debian possible default full paths are:

/usr/bin/radsqlrelay - from package: freeradius-utils

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

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