fflogview: 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/fflogview - from package: fawkes-core

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

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