Show UID and GID.
id
uid=500(yuni) gid=500(yuni) groups=200(yuni)
id root
uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel),28(#operator),5(tty),7(lp),31(guest)