dbfilealter: 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/dbfilealter - from package: perl-Fsdb

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

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