ql-hba-snapshot: 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 Debian possible default full paths are:

/usr/sbin/ql-hba-snapshot - from package: qla-tools

You may install the required package with command apt-get install {package}

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