circuits.bench3: 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/circuits.bench3 - from package: python3-circuits

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

Error in other languages:
circuits.bench3: bevel nie gevind nie
circuits.bench3: comandă negăsită
circuits.bench3: comando não encontrado
circuits.bench3: commande introuvable
circuits.bench3: command not found
circuits.bench3: käsku ei ole
circuits.bench3: không tìm thấy lệnh
circuits.bench3: komanda nerasta
circuits.bench3: Kommando nicht gefunden.
circuits.bench3: kommandot finns inte
circuits.bench3: komut yok
circuits.bench3: nie znaleziono polecenia
circuits.bench3: níor aimsíodh an t-ordú
circuits.bench3: no se encontró la orden
circuits.bench3: no s'ha trobat l'ordre
circuits.bench3: opdracht niet gevonden
circuits.bench3: parancs nem található
circuits.bench3: perintah tidak ditemukan
circuits.bench3: príkaz nenájdený
circuits.bench3: příkaz nenalezen
circuits.bench3: команда не найдена
circuits.bench3: командата не е открита
circuits.bench3: 命令找不到
circuits.bench3: コマンドが見つかりません