tide: 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/tide - from package: xtide

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