snake-install-tui: 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/sbin/snake-install-tui - from package: snake

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