fcrls: 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/fcrls - from package: fcoe-utils

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

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