boot environmentsfreebsd has a fantastic featurecalled boot environments which arelike a snapshot of yourboot environmentof your your operating systema bit of akin toit's not it's not there's nothing likeit really i was going to say it's a bitlike the um the rollback feature inwindows but it's not even like thatthere's just nothing like it so whatthis allows you to do which is what iuse it for mainly iswhat am i doing with my hands what'sthis i don't do thatso what i use this for is when i'm doinga load ofsystem updatesi will take a snapshot of the bootenvironmentdo the updatesif it goes wrong which nine times out of10 it doesn't but if there'sfor instancesomething that i'm going to update withphp and the the application thatuses php doesn't work with sayversion 8 as opposed to version 7. i canjust roll back to the other bootenvironment and it still worksso let's have a look at it and see whatwhat it is and how it works shall weso looking at my terminal here i'mlogged intoa vanilla freebsd 13.1releaseand let's go b ectl so there are two tools that you canuse for thisthere's be ctl or you can installbe adminbe admwhich gives youless options but it's easier to use soit might be better for you to use thisone soi'm going to use bectl for now so therewe go if we list it it will tell youwhat boot environments we've got at themoment just the defaultnice and simple and it was created onfirst of the 8th 2022 which is todaywhen i installed the systemfairly simplesolet's create oneandsee what we can do with actuallysobe ctlcreateand it will tell you where i've gonewrongand the namenice and easy so let's gotestlist so there's our two bootenvironments so if i nowinstall some softwarelet's golet's install vim i don't use vim it'snot something i would normally installthere we goso there it isthat's why i hate vimi can never remember the commands rightso if i now look at my boot environmentsso what can i do with that welllet's say forargument's sake thatwhen i installed vim it screwedsomething up clearly it didn't and itwouldn't but what can i dowell i can boot into the the bootenvironment that i created a few minutesagorebootand it's like it's not installed solet's do that so b c tlthere we go so if i do my list againand then i rebootso let's go tothe system to see it rebootingjust so that you know that i'm notcheatingokay so you can see that that is nowrestartedlet's go back andrestart this sessionand clear itlet's do athe ctl listso there you go the test is now activesoprobably should have picked somethingbetter than vi to be honest so vimthere we go not installedabsolutely invaluable so if i nowreactivatethe defaultboot environmenthelps if i actually spell correctlythere we goso that's now the one that'sactive and then reboot againbin will be installed againwell that's interestingwhat happened therereboot not restartso go back to the box itself there yougo restartingbeepup it comestime and datethere we go let's restart restart theterminalthere we goand i'm back into that one so if i nowdo vim there you go it's backthere we goso there's alsobe adminwhich again does the same thing but itdoesn't have so manyof thethe switches that you can put on the endso if you look atit's got more of itbut yeah i find this absolutelyinvaluablei have got into the routine now where ifi'm doing updatesi make surethat i take a snapshot of my bootenvironment becausei lose the serveri've got to go on site and i've got tofix it physically i don't want to dothati'd much rather just be able to gothere we go activate that let's go backabsolutely fantasticso there's a littleinsight into umboot environments on freebsdas i say complete game changer andtotally invaluable to what i do as aserver administrator i'm sure there aremorein-depth things that you can do with itbut for mehaving a list of boot environments thati can boot intoafter i've done some updatesthat's justtotal game changer hope you've enjoyedthis video like i said not not amassive one not an in-depth thing just aquick look at boot environments onfreebsd how they help me specificallyand maybe you can start using themjust to cover your back when you'redoing updatesif you want tohope you've enjoyed itsubscribe for more videos they come outonce a week in the holidays at themoment andafter that it'll go back to twice a weekgive it a like if you like it don'tforget discord link in the descriptiontell me if you're usingboot environments in the comments downbelow be interesting to see how many ofyou are and if you're using it in aspecific wayan advanced way let me know in thecommentsas always i'll see you next videotake care