Tips on running multiple distros together on my laptop?
Hello all, sorry for such a newbish question, as I should probably know how to properly partition a hard drive, but I really don't know where to start. So what I'm looking to do is install a Debian distro, RHEL, and Arch. Want to go with Mint LMDE, Manjaro, and Fedora. I do not need very much storage, so I don't think space is an issue. I have like a 500+ something GB ssd and the few things that I do need to store are in a cloud. I pretty much use my laptop for browsing, researching, maybe streaming videos, and hopefully more programming and tinkering as I learn more; that's about all... no gaming or no data hoarding.
Do I basically just start off installing one distro on the full hard drive and then when I go to install the others, just choose the "run alongside" option? or would I have to manually partition things out? Any thing to worry about with conflicts between different types of distros, etc.? hoping you kind folks can offer me some simple advice on how to go about this without messing up my system. It SEEMS simple enough and it might be so, but I just don't personally know how to go about it lol. Thanks alot!!
Warning: this is definitively doable, but messier than it looks like. I'd recommend you to partition it manually, before installing any distro, like this:
one partition per distro. For sizes check their requirements. Given 500GB I'd probably reserve 60GB for each, perhaps a bit more if I know that I'll install a lot of stuff in that distro.
one swap partition, that'll be accessed across distros. Optional if you have 16GB+ of RAM.
use the leftover space for a "storage" partition, for personal files that you won't save in someone else's computer (i.e. the cloud). That allows you to mess with the distros without risking your personal files.
Don't worry too much on getting the space right though - if necessary you can always resize a few partitions after installation. It's a bit of a bother though.
Do not share /home across distros, it's simply more trouble than it's worth. Instead, mount that "storage" partition in each distro, inside your /home/[$username] directory.
Another thing that you might want to consider is virtualisation. Odds are that you won't use a lot of those distros in your everyday, and that you're just curious about their differences. In that case, consider installing one of them, install Virtualbox in it, and then the other distros get installed inside Virtualbox. I'm suggesting that because it'll use overall less space, and make distro management less messy.
So... I guess it should work but you will end up with looots of partitions and pretty sure you have no idea what is what.
But if you plan on nuking it in the end, here is how to do it:
install a Distro to full hard drive
use some partition manager like KDE-Partitionmanager (the best of all) or Gparted and resize the big ext4/btrfs/zfs whatever storage partition as small as you want
install the next distro into the empty space
shrink that distros storage again, repeat
And please report if some crazy stuff happens with Grub or if you get secureboot working!
Triple booting is a pita, moreso if you don't know how to partition a disk. I'd want any laptop encrypted, which adds further complexity to the triple boot.
If you wanna browse, research, watch videos and tinker just install a distro. If you wanna spend time switching your system off and on again over and over and over again to find out what's working/broken go for the triple boot.
Docker could be worth a shot. You can 'docker pull fedora/arch/debina/whatever' and can play around with the base systems. Alpine takes up about 6mib so isn't too resource intensive if you need to nuke it a few hundred times to get up and running.
All these people saying don't do it - clearly, they're trying to learn something and are not necessarily after a fully usable, encrypted production system. Instead of telling them it's too complicated, we should encourage to play around and figure it out, so in the process maybe they find out on their own why this configuration might not make any sense in most situations.
So @op, just go for it, you're going to learn a lot from this!
One thing that might matter is that if all distros use the same swap partition for hibernation, you shouldn't boot one distro after hibernating another or you might overwrite the saved RAM contents.
If you use different swap partitions or files, you probably should still avoid writing to a partition that belongs to a distro that isn't actually shut down.
It could be done if you partition your disk prior to installing but, if there is no particular reason, you could make a bunch of VM's and daily drive one of the distros.
Do I basically just start off installing one distro on the full hard drive and then when I go to install the others, just choose the “run alongside” option? or would I have to manually partition things out?
If you install one distro on full hard drive you won't have room anymore for the rest, if you want multiple operating systems on your machine you need to partition manually with some planning ahead on how to allocate the space.
Any thing to worry about with conflicts between different types of distros
They don't interfere with each other, they don't even "see" each other once you booted into one, they only share the boot manager.
That being said, what you intend to do was the only way to learn many years ago when computers weren't as powerful as they are today (I did learn that way), but today ANY PC can manage virtual machines, they are much more practical and can save you a lot of time when you mess things up, because whatever you do is confined within the VM and doesn't affect your PC as a whole.
Install Virtualbox, have a look at how it works and use that to do all experiments you want, you can even learn to multiboot inside a single VM, without the risk of messing up your system.
Not really a solution to what you need, but you should consider distros other than manjaro, it does some shady stuff, has ddos'ed the AUR multiple times (even though the AUR is "unsupported") and let the security certificates for their site expire (their solution: to turn back your clock to update the system). You should try endeavour instead.