gsnd: 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/gsnd - from package: ghostscript

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

On Debian possible default full paths are:

/usr/bin/gsnd - from package: ghostscript

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

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