I've not experimented with server systems for many many years so would like to understand a few points.
On my home machine I have 2 hard drives one has 2 partitions, Ubuntu on the first and Fedora which I use most on the second partition. the pc boots through the Ubuntu grub.
I have Fedora 16 on the second drive but don't use it. If I install CentOS on that Fedora hard drive with the first drive unplugged it should be a fresh install. Questions: When I switch on the first hard drive and cold boot, I can choose on bios boot between the centos and nix drives, Centos should not know of the other's existence is this correct. As a server, the Centos drive would permit access to 3 ip addresses. It will have LAMP stack, latest Ruby and Rails and Drupal 7 for development. Is it possible, while the pc is switched on during the day to use the CentOS as a server for development without affecting or accessing my working Linux installations? Will a thompson gateway TG782T ADSL modem/router be sufficient to act as a basic server modem for the above proposal. I hope I've explained it well enough.
I'm thinking about getting something like a HP6200 for a server but want to learn first before parting with cash.
On 2/7/14, Roger arelem@bigpond.com wrote:
I've not experimented with server systems for many many years so would like to understand a few points.
On my home machine I have 2 hard drives one has 2 partitions, Ubuntu on the first and Fedora which I use most on the second partition. the pc boots through the Ubuntu grub.
I have Fedora 16 on the second drive but don't use it. If I install CentOS on that Fedora hard drive with the first drive unplugged it should be a fresh install. Questions: When I switch on the first hard drive and cold boot, I can choose on bios boot between the centos and nix drives, Centos should not know of the other's existence is this correct. As a server, the Centos drive would permit access to 3 ip addresses. It will have LAMP stack, latest Ruby and Rails and Drupal 7 for development. Is it possible, while the pc is switched on during the day to use the CentOS as a server for development without affecting or accessing my working Linux installations?
I assume you are only using the CentOS installation for development/testing, why not virtualize it? That way you don't have to worry about it affecting your existing daily use OS.
Allegedly, on or about 07 February 2014, Roger sent:
Is it possible, while the pc is switched on during the day to use the CentOS as a server for development without affecting or accessing my working Linux installations?
Unless you're sharing some drive space between each installation (such as a common swap partition, or things like sharing the user data directories between each OS), then one OS doesn't do anything to the other operating systems.
I've done that sort of thing before - having totally independent multiple installs in one PC, and having shared data directories between them.
You shouldn't need to unplug a drive to make a fresh install clean from any other installs, however it does make easier to avoid accidentally selecting the wrong drive to install to. But, on the other hand, if you're changing what drives are plugged in, or playing with BIOS options for which one to boot up, the system may identify each drive differently (e.g. what was considered the first and second drives might be numbered differently).
Will a thompson gateway TG782T ADSL modem/router be sufficient to act as a basic server modem for the above proposal.
Never seen one, but just Googling the name produced several links about problems with them.
Over the years, I've gone through about three ADSL modem/routers, two of them Billion's, and another that I can't recall. All were much of a muchness, worked well enough until random technical failures occurred, as any electronic device may suffer from.
Some routers overheat, badly, because the casing is a bad design, air-flow wise, but you can circumvent that by sticking a fan next to them.
I'm inclined to believe that my problems stem from how most domestic ethernet ports are not floating transformer coupled on the data lines. So any ground loops between the equipment can stress them. It gets worse when you interconnect equipment across different rooms or buildings, especially when equipment uses ungrounded switchmode power supplies. Expensive routers/switchers use galvanically isolated ethernet ports that avoid that problem (there's a signal transformer between inputs and outputs, with only a magnetic coupling between each side of the transformer, and they're rated to handle significant undesired interferring signal voltages without dying).
On 02/07/2014 10:20 AM, Tim wrote:
You shouldn't need to unplug a drive to make a fresh install clean from any other installs, however it does make easier to avoid accidentally selecting the wrong drive to install to. But, on the other hand, if you're changing what drives are plugged in, or playing with BIOS options for which one to boot up, the system may identify each drive differently (e.g. what was considered the first and second drives might be numbered differently).
That's my thought, too, although anaconda sets /etc/fstab up with the partition UUID to avoid that issue. However, if you're going to want those partitions mounted at specific mount points, it's much easier to do that during installation.
On 02/07/2014 01:20 PM, Tim wrote:
Allegedly, on or about 07 February 2014, Roger sent:
Is it possible, while the pc is switched on during the day to use the CentOS as a server for development without affecting or accessing my working Linux installations?
Unless you're sharing some drive space between each installation (such as a common swap partition, or things like sharing the user data directories between each OS), then one OS doesn't do anything to the other operating systems.
I've done that sort of thing before - having totally independent multiple installs in one PC, and having shared data directories between them.
You shouldn't need to unplug a drive to make a fresh install clean from any other installs, however it does make easier to avoid accidentally selecting the wrong drive to install to. But, on the other hand, if you're changing what drives are plugged in, or playing with BIOS options for which one to boot up, the system may identify each drive differently (e.g. what was considered the first and second drives might be numbered differently).
Will a thompson gateway TG782T ADSL modem/router be sufficient to act as a basic server modem for the above proposal.
Never seen one, but just Googling the name produced several links about problems with them.
Over the years, I've gone through about three ADSL modem/routers, two of them Billion's, and another that I can't recall. All were much of a muchness, worked well enough until random technical failures occurred, as any electronic device may suffer from.
Some routers overheat, badly, because the casing is a bad design, air-flow wise, but you can circumvent that by sticking a fan next to them.
I'm inclined to believe that my problems stem from how most domestic ethernet ports are not floating transformer coupled on the data lines. So any ground loops between the equipment can stress them. It gets worse when you interconnect equipment across different rooms or buildings, especially when equipment uses ungrounded switchmode power supplies. Expensive routers/switchers use galvanically isolated ethernet ports that avoid that problem (there's a signal transformer between inputs and outputs, with only a magnetic coupling between each side of the transformer, and they're rated to handle significant undesired interferring signal voltages without dying).
One issue might be the sharing of your home directory. Usually the issue is with the desktop and the dot files.
On Sat, 2014-02-08 at 10:12 -0500, Jerry Feldman wrote:
One issue might be the sharing of your home directory. Usually the issue is with the desktop and the dot files.
The opposite of what they're trying to do (keep things isolated).
Having said that, when I've networked systems, or with multiboot systems, setting things up to use a shared homespace, I don't directly do it that way. I give each of them a local homespace, just like a standalone install would have. But inside that local homespace is a link to storage space on the server. Users store everything within there.