dps-config: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/dps-config - from package: dpsearch

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