dbfilecat: 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/dbfilecat - from package: perl-Fsdb

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

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