vermin: 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/vermin - from package: gtkwave

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

On Debian possible default full paths are:

/usr/bin/vermin - from package: gtkwave

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

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