randobj: 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/lib/x86_64-linux-gnu/gap/pkg/guava/bin/leon/randobj - from package: gap-guava-bin

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

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