snp-sites: 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 Debian possible default full paths are:

/usr/bin/snp-sites - from package: snp-sites

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

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