rmap: 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/rmap - from package: rmap

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

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