shindo: command not found

Have You tried accessing the binary with the full path?

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 Debian possible default full paths are:

/usr/bin/shindo - from package: ruby-shindo

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