genresscript: 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/genresscript - from package: icoutils

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

On Debian possible default full paths are:

/usr/bin/genresscript - from package: icoutils

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

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