qwavinfo: 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/bin/qwavinfo - from package: quelcom

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

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