rlatex: 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/rlatex - from package: sgml2x

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

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