Or run yum makecache (from the other answers) which seems to remove the cache and pull down fresh copies right then. Or change the metadata_expire parameter of yum.conf to less than the default 90min, I guess. Because future yum commands refresh the cache, this is in practice the same as apt-get update. ![]() Use yum clean expire-cache (or yum clean all) first, then any future yum commands will auto-refresh the cache "when run.". You can see how long it will take before doing the "auto refresh" that all commands do underneath, by running this: yum repolist enabled -v This means that check-update is not performing an update, like apt-get update does. I sudo crontab -e and put: 00 13 apt update & apt upgrade My impression is that these command will run (as sudo user) at 13:00 every day. Loading mirror speeds from cached hostfile I want to run apt update and apt upgrade once per day. So if you run yum check-update and get this: $ sudo yum check-update Apparently its purpose is "know if your machine had any updates that needed to be applied without running it interactively" so basically it's "check if any packages are update-able" not "refresh the list of packages that I could update to" as you'd expect. Ive tried running: sudo apt-get update Which produces a few 404 errors: Then sudo apt-get upgrade seems to think nothing exists: tombotMagma-Core-Kernel: sudo apt-get upgrade Reading package lists. Lnh apt update, ch thc hin vic cp nht các ch mc gói ca h thng Linux hoc danh sách gói. Im running Ubuntu 18.04.1 LTS and Im trying to update things on my system. ![]() ây là lnh ch yu c gi sau khi cài t h thng mi hoc trc khi cài t gói phn mm mi. ![]() Lnh apt update, ch thc hin vic cp nht cc ch mc gi ca h thng Linux hoc danh sch gi. S khác bit gia apt update vs apt upgrade. Also be aware that downloaded package files (.deb files) are kept in /var/cache/apt/archives. It’s worth checking with df -h that you have enough free disk space, as unfortunately apt will not do this for you. Unfortunately yum check-update by default doesn't pull down changes from remote repositories until yum.conf's metadata_expire parameter has elapsed (default 90m). y l lnh ch yu c gi sau khi ci t h thng mi hoc trc khi ci t gi phn mm mi. When running sudo apt full-upgrade, it will show how much data will be downloaded and how much space it will take up on the SD card.
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