gimp-remote: 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/gimp-remote - from package: gimp

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

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