razers3: 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/razers3 - from package: seqan-apps
/usr/lib/seqan/bin/razers3 - from package: seqan-apps

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

Error in other languages:
razers3: bevel nie gevind nie
razers3: comandă negăsită
razers3: comando não encontrado
razers3: commande introuvable
razers3: command not found
razers3: käsku ei ole
razers3: không tìm thấy lệnh
razers3: komanda nerasta
razers3: Kommando nicht gefunden.
razers3: kommandot finns inte
razers3: komut yok
razers3: nie znaleziono polecenia
razers3: níor aimsíodh an t-ordú
razers3: no se encontró la orden
razers3: no s'ha trobat l'ordre
razers3: opdracht niet gevonden
razers3: parancs nem található
razers3: perintah tidak ditemukan
razers3: príkaz nenájdený
razers3: příkaz nenalezen
razers3: команда не найдена
razers3: командата не е открита
razers3: 命令找不到
razers3: コマンドが見つかりません