redland-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/redland-config - from package: redland-devel

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

On Debian possible default full paths are:

/usr/bin/redland-config - from package: librdf0-dev

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

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