![]() ![]() Or run yum makecache (from the other answers) which seems to remove the cache and pull down fresh copies right then. Note: You must run these commands as a root user or by using the sudo prefix. Debian based systems, such as the Raspberry Pi and Ubuntu, is Apt. Or change the metadata_expire parameter of yum.conf to less than the default 90min, I guess. Heres how to utilize the apt update command. Was it clear I would advise reading a bit more on the apt and apt-get commands. There is also apt full-upgrade which is equivalent to dist-upgrade. Because future yum commands refresh the cache, this is in practice the same as apt-get update. Unlike apt-get upgrade, the apt upgrade can install new packages and hence it can upgrade the Linux kernel version. 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 Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. To really update packages, you have to type: sudo apt-get upgrade afterwards as well edit: let me add to this that sudo apt-get upgrade will finish with Reading state information. Thus, you command should be sudo apt-get install myunity. Lnh apt update, ch thc hin vic cp nht cc ch mc gi ca h thng Linux hoc danh sch gi. There is nothing wrong with your system: sudo apt-get update will only update the package list. So, because apt-get installs software and thus affects the system, you need to use the sudo command to give yourself administrator privilages. This means that check-update is not performing an update, like apt-get update does. y l lnh ch yu c gi sau khi ci t h thng mi hoc trc khi ci t gi phn mm mi. Loading mirror speeds from cached hostfile 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. If you want to keep your Ubuntu system updated, you use the combination of sudo apt update and sudo apt upgrade commands. 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).
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