Installing Linux Security Updates2:23 with Jay McGavren
Linux installs with slightly older software packages by default. Security holes may have been discovered since they were released. To install fixes for those holes, we need to update the software.
There's one last thing we should take care of with setting up our Ubuntu server. 0:00 When you log in you'll probably see a notice that software updates are available 0:04 including some security updates. 0:08 For security's sake, let's install those. 0:12 We're going to use the apt-get package manager again to install these updates. 0:15 And as before we're going to need to preface that with the sudo command so 0:19 that we run with administrative privileges. 0:23 So we type sudo apt-get space and then the update subcommand. 0:25 It'll ask for our password. 0:33 And then it'll download the latest information about the packages that 0:39 are available. 0:42 Now let's run the upgrade subcommand to upgrade all the packages that 0:44 are currently available. 0:47 We type sudo apt-get, as before, followed by upgrade instead of update. 0:49 It will ask if we want to install updates to all these. 0:59 Yes is that the default so we'll just hit Enter, and 1:01 it will download and install them for us automatically. 1:05 Now following a major update like this, a system restart may be required. 1:14 We can do that with the command sudo shutdown. 1:18 We can pass the -r flag to it, saying that we want to restart after the shutdown. 1:24 And then normally shutdowns are delayed by a little bit, 1:32 but we can shut down now by adding now to the end of the command. 1:35 Hit Enter to submit the command, and 1:39 your connection will be closed because the virtual machine is shutting down. 1:41 So now we're back at the prompt on our host machine. 1:47 We can just type ssh 1:50 username@hostcom, and 1:54 any time to reconnect via ssh. 1:59 In addition to issuing shutdown commands, you can also suspend the virtual system 2:06 and restart it any time see the teachers notes for info on how to do this and more. 2:10 So now you have a virtual Linux server running on your computer, ready for 2:15 use anytime you wanna experiment with deploying applications. 2:19
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