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inotify is better. A trivial script can watch and compare inotify and logs. systemtap if you need more detail. But you should just wipe it, restore from backups, apply updates to joomla/etc, then put it back online. Don't try to fix a server you know is compromised.
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Feb 10, 2016 20:30
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Is this the proper entry to fstab to mount an NFS share on start-up?code:
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Feb 10, 2016 21:10
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evol262 posted:inotify is better. A trivial script can watch and compare inotify and logs. systemtap if you need more detail. Thanks. I looked into inotify but inotify-tools isn't available to my user. They're on shared hosting so there's only so much I can do. I restored their oldest backup and did all the updating / hardening I could, but the php files are still appearing... I know I should tell them to forget it all and start from scratch with a new website and new host, but it's a local school with no budget and that news would be pretty devastating. I figured I would at least try first and see if it was something salvageable...
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Feb 10, 2016 21:13
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fuf posted:I'm trying to fix a website that's been hacked. Joomla and wordpress? good luck with that. The correct course of action is to nuke it, but given that might not be possible for you: Which version of joomla? are they part of the huge swarm of insecure 1.5 installations still out there ? For the wordpress site, try disabling all plugins and reverting to the default theme. A super popular way of getting owned is to use pirated wordpress themes.
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Feb 10, 2016 21:25
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fuf posted:Thanks. I looked into inotify but inotify-tools isn't available to my user. They're on shared hosting so there's only so much I can do. Well, that rules out systemtap, too. If you can't use inotify, you'll have to write your own watcher and hope, but rootkits can easily evade it (not that they can't avoid inotify). But this is a worst-case scenario. There's almost no way to guarantee that some other site on the shared hosting was exploited, and a local root exploit after that. Probably not, but the entire system is untrustable. Does your provider have backups? If you're not going to write anything, use acls to block the creation of new files, at least, and examine options after that.
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Feb 10, 2016 23:12
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Looks like Linux isn't for me then. Well, drat. Thanks for being honest and not fanboys, guys. That's...nonexistant anywhere else, haha.
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Feb 11, 2016 01:25
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Verge posted:Looks like Linux isn't for me then. Well, drat. Thanks for being honest and not fanboys, guys. That's...nonexistant anywhere else, haha. It's probably getting better in a year or two, especially if Linux releases of AAA games keeps gaining momentum.
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Feb 11, 2016 02:14
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And if radeonhd keeps getting love. It'll take a while for gaming on Linux to be great, but it's leaps and bounds past what it was 2 years ago. That said, I probably wouldn't recommend that anyone change to it just for games. If gaming is a serious hobby and you want to learn Linux, that's what a VM is for
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Feb 11, 2016 03:31
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Verge posted:Looks like Linux isn't for me then. Well, drat. Thanks for being honest and not fanboys, guys. That's...nonexistant anywhere else, haha. If you're replacing your computer, keep the old one and use it for mucking around in Linux. Getting used to the file system structure and general commands is a good skill to learn and will become more and more useful as Linux becomes more prevalent. Linux has come a long, long way from the days when it was strictly command-line and you had to bust out the compiler any time you wanted to do anything, not that there's anything wrong with that.
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Feb 11, 2016 03:42
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I have been recommending Vagrant (https://www.vagrantup.com) to people wanting to use linux for a specific one-off purpose, or learning. Its crazy easy to use, but someone new to Linux or unfamiliar with VMs would never know how to find it.
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Feb 11, 2016 03:46
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I just got a new laptop that I'll be primarily using for scientific computing research. It came with Windows 8 but I'll need to use Linux like 98% of the time so I want to just wipe the SSD clean and install Linux (specifically CentOS) and install Windows 10 as a VM. But I'd like to have a physical partition for Windows for the 1% of the time I ever want to literally boot up into Windows instead of just running Windows as a VM. On OS X it is/was possible for me to install Windows via Boot Camp and then either boot into Windows or launch a VM with that specific Windows installation, so I would imagine it should be possible to do this with Linux but from the quick searches I've found some things about Windows not activating and things like that. So what's the verdict and if it's possible what do I do? (Yes I'm allowed to do this with this laptop by the way). tl dr I want to reformat my SSD and create a Windows and Linux partition that can operate independently, but I also want to be able to launch that Windows partition from inside Linux as a VM. Can I do this.
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Feb 11, 2016 09:33
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Boris Galerkin posted:tl dr I want to reformat my SSD and create a Windows and Linux partition that can operate independently, but I also want to be able to launch that Windows partition from inside Linux as a VM. Can I do this. I'm sure this is a bad idea for a number of reasons - off the top of my head hardware issues might crop up since the VM emulates it all vs having access to the actual bare-metal devices. Also Windows performance is apparently not so hot when its run from a file. Either way, a fun weekend project? v  vEdit: this might help http://superuser.com/questions/638438/is-it-possible-to-boot-a-windows-vhd-using-grub-on-a-physical-machine Edit2: And this just came to mind, you'll probably run into activation issues because even if you get the VHD to boot via grub, the physical motherboard vs the virtual host's motherboard will register as different hardware in Windows. This will most likely trigger activation issues because it'll think it's running on two separate machines. IAmKale fucked around with this message at 15:08 on Feb 11, 2016 |
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Feb 11, 2016 15:01
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Is there anything I should be looking at besides keepalived if I want to ensure that the front end IPs for our haproxy farm are available across multiple hosts, say up to 10 of them? In short, we want to have a cluster of physical hosts running haproxy (with a ruleset managed by bamboo that is watching marathon for new apps to launch on mesos) that will be behind a round-robin DNS record, but we want to make sure that if one or two hosts go offline for whatever reason, the front end VIPs for haproxy get brought online on other hosts in the cluster, and, ideally, spread those VIPs back across the cluster once the hosts are healthy. I looked at corosync + pacemaker but it seems like we'd have to do shared storage if we wanted to do active/active, and it seems way way more complicated than what we actually need. (Yes, I know the proper way to do this isn't round-robin DNS and keepalived, but we may or may not have hardware load balancers available to us, so I'm preparing a backup plan)
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Feb 11, 2016 15:22
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Boris Galerkin posted:tl dr I want to reformat my SSD and create a Windows and Linux partition that can operate independently, but I also want to be able to launch that Windows partition from inside Linux as a VM. Can I do this. This is possible in principle, since you can create a VM hard disk file that just points it at the actual partition and then boot that. However, windows will likely freak the gently caress out when you switch from VM to bare metal (or vice versa) because it will look like all of its hardware has changed under it. Best case, you'll need to reactivate windows and install a bunch of drivers. Worst case, it will outright refuse to boot. It's probably not worth the effort.
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Feb 11, 2016 15:50
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I have a network problem and damned if I know why it does not work. I have a Debian 8 KVM host that runs a PfSense VM. The pfSense machine has a hardware Nic passed through to it that is its WAN interface. The LAN interface is a bridge created out of the eth0 Nic on the Debian machine. Now all my machines can get on the Internet except machines connected to the KVM bridge. I have a NAS that connects trough the Linux bridge to the PfSense machine and has Internet but all the other machines that are running on the KVM host can't. Is there some funky bridge magic that I am missing? Edit: I seem to have fixed it. The PfSense Virtio driver seems to be hosed. On a forum post I found that you have to use the e1000g driver for it to work. Now all traffic is bridged properly. Very weird, ICMP worked fine, tcp was borked. Another thing: Turn off TCP offloading to get some semblance of performance. My network connection, which easily gets 3,5MB/sec, got 400 k/sec turning it off made it resume back to normal speeds. Mr Shiny Pants fucked around with this message at 19:53 on Feb 11, 2016 |
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Feb 11, 2016 16:43
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Barnyard Protein posted:I have been recommending Vagrant (https://www.vagrantup.com) to people wanting to use linux for a specific one-off purpose, or learning. Its crazy easy to use, but someone new to Linux or unfamiliar with VMs would never know how to find it. That looks neat. As soon as I'm done with this whole Microsoft certification thing, I want to concentrate more on Linux stuff. How does Vagrant relate to RancherOS?
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Feb 11, 2016 17:35
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HPL posted:How does Vagrant relate to RancherOS? It basically doesn't. Vagrant and Docker can serve some similar use cases, but Vagrant is a generic (though primarily Virtualbox) driver for VMs which easily handles some provisioning of stuff, to make configuration-as-code desktop VMs which can be easily distributed for QA/Dev/etc to get your app easily running to test/work on. Docker fills a similar hole for production (and sometimes testing/QE).
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Feb 11, 2016 18:05
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KVM is cool and I should have done this ages ago.
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Feb 11, 2016 19:14
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I bought a 250 GB SSD drive today to replace my 125 GB one, so I have a 125 GB drive left to fully partition into whatever Linux distro. I've been learning how to program for the last couple of months and I've been wanting to learn more about Linux and, if I like it enough, completely transfer to it except for gaming. My programming experience is still limited and I have practically no experience with Linux. Although I'd love to dive into Arch Linux right away to learn it from the ground up I think it's probably wiser to learn some fundamentals of Linux with a more user friendly distro first. It must have good documentation so I can easily look up information. What's a good distro to learn the ropes with for a complete beginner?
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Feb 11, 2016 19:43
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Thermopyle posted:KVM is cool and I should have done this ages ago. Ain't that the truth, I am pleasantly surprised by all the possibilities it offers. Passing trough a NIC for a Firewall was a first for me, but it all worked really well. After editing GRUB to include "intel_iommu=on" to get VT-d working it was plain sailing. Now I am thinking of running my TV Card in it and getting TV-Headend to work in a VM  .
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Feb 11, 2016 19:51
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evol262 posted:And if radeonhd keeps getting love. Not being able to play games is the only thing keeping Windows on my personal computer.
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Feb 11, 2016 19:54
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Tab8715 posted:Not being able to play games is the only thing keeping Windows on my personal computer. That is why i am thinking of buying a Steam link, creating a KVM VM with a passed through GPU running Windows and playing my games that way. Windows 10 has nothing I want, and 8.1 does not get the cool updates but does get the crapware. ( telemetry stuff )
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Feb 11, 2016 20:21
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Thermopyle posted:KVM is cool and I should have done this ages ago. Legit thinking of trying RHEV on my spare R710 for shits and giggles. e: oVirt I guess. Is oVirt the actual downstream repackaging of RHEV or just a similar product? some kinda jackal fucked around with this message at 21:38 on Feb 11, 2016 |
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Feb 11, 2016 21:34
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RHEV is the downstream packaging for oVirt. oVirt is about 6 months ahead of the RHEV cadence (soon to be 9 months). I'd strongly recommend using the hosted engine, but that requires external FC/Gluster/iSCSI/NFS storage, which you probably have anyway, but... Also, feel free to ignore the absurdly large default memory settings the engine recommends. It's Java, so it's a little bit of a memory pig, but I've only seen one customer who actually needs the recommended 16GB, and they have more than 300 compute nodes. Also, the engine hammers postgres. A lot. There's a lot of optimization work going into oVirt 4.0 to make this better, but if your environment goes down, expect the engine to be a little unresponsive when you log back in. Some stupid design decisions in the distant past means that it doesn't pre-query anything, so when you log in for the first time after an outage, it pulls however many hours of metrics. Set VMs to autostart, or use the Python/Java/REST/XMLRPC API to start the VMs you want. I principally work on oVirt/RHEV, so fire away here or in the virt thread if you have any questions. I haven't bothered reading any other threads in months. I know there are a couple of other oVirt users in the virt thread, though.
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Feb 11, 2016 21:47
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Oops sorry I got downstream/upstream flipped. Does RedHat publish any tools or best practices on migrating from vSphere to RHEV/oVirt? Legit curious how difficult that process is. My lab is only 20 VMs right now, and most of those are throw-away junk boxes that I spin up for testing, but I'd probably have to migrate a good 5-8 actual "important" VMs at some point. I'll test it out on my spare box first though.
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Feb 11, 2016 21:52
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Well, poo poo. I didn't know there was a virtualization thread.
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Feb 11, 2016 22:13
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Martytoof posted:Oops sorry I got downstream/upstream flipped. virt-v2v. There are official docs, but you may as well just follow this, since I can't be bothered searching the official docs.
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Feb 11, 2016 22:43
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Awesome, thanks
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Feb 11, 2016 23:19
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I imagine this a pretty much universally hated question, but I'm wondering what Linux distro to use on a VM, and potentially install on a laptop. I am currently a CS major, and pretty much all of the assignments in every class are designed to be compiled and tested on a Linux server, and we are heavily encouraged to install at minimum a Linux VM so we don't have to constantly SSH to the server. My main use is going to be writing and compiling C and C++, but I will need to use X11 for some applications. My main experience with Linux was using Arch as my primary OS 6 years ago or so, where I primarily used OpenBox as my WM, and forewent a proper DE. Though I enjoyed Arch a lot, it seems like a pain in the just to use in a VM. Is there a nice, tiny, lightweight distro that doesn't require much finagling?
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Feb 12, 2016 01:56
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everythingWasBees posted:I imagine this a pretty much universally hated question, but I'm wondering what Linux distro to use on a VM, and potentially install on a laptop. I am currently a CS major, and pretty much all of the assignments in every class are designed to be compiled and tested on a Linux server, and we are heavily encouraged to install at minimum a Linux VM so we don't have to constantly SSH to the server. My main use is going to be writing and compiling C and C++, but I will need to use X11 for some applications. My main experience with Linux was using Arch as my primary OS 6 years ago or so, where I primarily used OpenBox as my WM, and forewent a proper DE. Though I enjoyed Arch a lot, it seems like a pain in the just to use in a VM. Is there a nice, tiny, lightweight distro that doesn't require much finagling? If you set up a VM won't you still just be SSHing into it?
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Feb 12, 2016 02:00
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Ubuntu will probably be the go-to response. I'm partial to CentOS though I'll admit it's not really cutting edge if you're going to use it as a desktop. If you're going to be installing in VMware Workstation or VMware Player then just make sure you either install open-vm-tools or VMware Tools from VMware and you'll be good to go.
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Feb 12, 2016 02:01
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Methanar posted:If you set up a VM won't you still just be SSHing into it? It's more that the server is under constant heavy load and is a pain in the rear end to work in more than anything. Also no X11.
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Feb 12, 2016 02:07
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Graphical option: Lubuntu Minimal option: Tiny Core Linux
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Feb 12, 2016 02:11
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Using a tiny distro will be a pain in the rear end if you ever need to pull libraries from a package manager. If you're just going to ssh in, use Fedora server, opensuse, or debian unstable. Actually, I'd probably recommend the same distros even if you want graphics (Fedora Workstation instead) Arch is OK for this use case, but pacman is lacking in a lot of areas.
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Feb 12, 2016 02:24
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Never not gentoo. If you can get it to work, anyway(its refused to run in a VM last few times I tried)
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Feb 12, 2016 02:47
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What does the server run? I'd suggest sticking to the desktop version of whatever the server is. You'll be pretty close on libraries and used to it.
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Feb 12, 2016 04:26
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jaegerx posted:What does the server run? I'd suggest sticking to the desktop version of whatever the server is. You'll be pretty close on libraries and used to it. As I think I've received recommendations for most of the major distros, I think I'm going with this, as it makes a lot of sense, and I feel like somewhat of an idiot from not starting out doing this.  It's apparently running CentOS (6.7), so CentOS it is.
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Feb 12, 2016 08:19
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everythingWasBees posted:As I think I've received recommendations for most of the major distros, I think I'm going with this, as it makes a lot of sense, and I feel like somewhat of an idiot from not starting out doing this. There's always containers if you wanna up your deployment game but since it's school then stick to what the professor knows.
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Feb 12, 2016 08:41
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jaegerx posted:There's always containers if you wanna up your deployment game but since it's school then stick to what the professor knows. Is there any good reason to use 6.7 over 7, besides that being the version the school uses? Or is it really not going to matter much.
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Feb 12, 2016 08:45
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I'm having a really frustrating time trying to dual boot Windows 10 and CentOS 7. First I wiped the hard drive and then installed Windows 10. This automatically created (off the top of my head) the following partitions: 1) Windows recovery, 2) 100 MB EFI boot partition, 3) a 16 MB Windows partition, and 4) a 100 GB data partition. I left the rest of the hard drive un partitioned at this point. Windows booted fine etc. Then I installed CentOS 7 and created a swap, home, root, and what I thought was a EFI boot partition. Now CentOS boots fine, but Windows has disappeared from grub. From searching around I found one recent thread where some other guy had the exact same problem as me and basically everything he's saying is 100% what I'm experiencing. https://www.centos.org/forums/viewtopic.php?f=47&t=55925 And I've tried everything in that thread. Sadly it got abandoned without a resolution. I think what happened was that CentOS overwrote the EFI boot partition that Windows created and I can't get my system to boot back into Windows. I've edited the grub.d/40... Config file like that thread said. I installed os prober and ntfs-3g. I can mount my Windows partition and I can see all the files in there. I just can not boot into Windows. Something else I found was this thread: http://askubuntu.com/questions/22698/update-grub2-not-finding-windows7-partition The first reply, he mentions something about os prober being confused about the Linux /boot and Windows /Boot folders and mentions a solution but I don't know how to remove /boot like he says. The other options I'm finding are to boot into a Windows recovery usb drive or something but I can't do this because I've deleted the Windows USB stick I used to install Windows in the first place and I can't boot back into Windows to create another one.
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Feb 12, 2016 08:58
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