ghwdump: 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 CentOS possible default full paths are:

/usr/bin/ghwdump - from package: gtkwave

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/ghwdump - from package: gtkwave

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

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