grsync-batch: 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 Debian possible default full paths are:

/usr/bin/grsync-batch - from package: grsync

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

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