rlog: 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/rlog - from package: rcs

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

On Debian possible default full paths are:

/usr/bin/rlog - from package: rcs

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

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