<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.sasisho hutumiwa kusanikisha toleo mpya zaidi la vifurushi vyote vilivyosanikishwa kwenye mfumo kutoka kwa vyanzo vilivyojumuishwa ndani etcaptsources.list .  <response>: upgrade is used to install the newest versions of all packages currently installed on the system from the sources enumerated in etcaptsources.list. 