razers2: 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
/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/lib/seqan/bin/razers2 - from package: seqan-apps

You may install the required package with command apt-get install {package}
Error in other languages:
razers2: bevel nie gevind nie
razers2: comandă negăsită
razers2: comando não encontrado
razers2: commande introuvable
razers2: command not found
razers2: käsku ei ole
razers2: không tìm thấy lệnh
razers2: komanda nerasta
razers2: Kommando nicht gefunden.
razers2: kommandot finns inte
razers2: komut yok
razers2: nie znaleziono polecenia
razers2: níor aimsíodh an t-ordú
razers2: no se encontró la orden
razers2: no s'ha trobat l'ordre
razers2: opdracht niet gevonden
razers2: parancs nem található
razers2: perintah tidak ditemukan
razers2: príkaz nenájdený
razers2: příkaz nenalezen
razers2: команда не найдена
razers2: командата не е открита
razers2: 命令找不到
razers2: コマンドが見つかりません