lrmadmin: 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/sbin/lrmadmin - from package: cluster-glue

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

On Debian possible default full paths are:

/usr/sbin/lrmadmin - from package: cluster-glue

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

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