verilator_bin: 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/verilator_bin - from package: verilator

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

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