sqback: 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/sbin/sqback - from package: sagator-core

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

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