seeman: 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/seeman - from package: seetxt

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

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