gaiksaurus: 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/gaiksaurus - from package: gaiksaurus

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