verilator: 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 - from package: verilator

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

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