seascope: 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/seascope - from package: seascope

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

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