create_db.Sybase: 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 Debian possible default full paths are:

/usr/share/sympa/bin/create_db.Sybase - from package: sympa

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