dissy: 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/dissy - from package: dissy

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

On Debian possible default full paths are:

/usr/bin/dissy - from package: dissy

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

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