spicy-screenshot: 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

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/spicy-screenshot - from package: spice-gtk-tools

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

On Debian possible default full paths are:

/usr/bin/spicy-screenshot - from package: spice-client-gtk

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