dbsort: 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/dbsort - from package: perl-Fsdb

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

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