Booting is the initial set of operations that a computer system performs when electrical power is switched on. The process begins when a computer that has been turned off is re-energized, and ends when the computer is ready to perform its normal operations.

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27
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3answers
2k views

Is it safe to reboot a server open to the internet?

Specifically I have an iptables ruleset defined on a server running CentOS. Am I guaranteed / can I guarantee / how can I guarantee that when networking comes online (either at machine boot, or after ...
22
votes
7answers
75k views

What is the recommended size for a Linux /boot partition?

What is the recommended size for a Linux /boot partition? And is it safe to not have a /boot partition? I see some servers don't have a /boot partition while some servers have a 128 MB /boot ...
19
votes
5answers
2k views

Extremely fast booting server

I'm changing the way that our DHCP/DNS stuff works at work. Currently we've got 3 DNS servers, and a DHCP box. All of them are VMs. There's a circular dependency where stuff booting requires NFS, ...
16
votes
4answers
14k views

Booting a native Windows install in Virtualbox: is it possible?

I am looking for something similiar to Bootcamp. Currently, I run Ubuntu Maveric as my primary operating system and run Windows 7 in Virtualbox. For some tasks, however, running Windows virtualized ...
16
votes
8answers
78k views

How to make a bootable USB drive out of a bootable DVD or CD

Is there a "universal" way of how you can make a bootable USB drive out of a bootable dvd or cd? What makes a USB drive bootable? What makes a dvd and cd bootable? For example there is a program ...
14
votes
2answers
3k views

Auto-booting and Securing a Linux Server with an Encrypted Filesystem

I'm setting up some new Ubuntu servers, and I'd like to secure the data on them against theft. The threat model is attackers desiring the hardware or rather naïve attackers desiring the data. ...
12
votes
2answers
859 views

Is there a way to create a “one-time” boot entry in grub?

I have the following issue: I have a small server (Debian based) to which I can connect remotely (VPN/SSH connection). Now I want to change some boot options (in fact I want to migrate my root file ...
11
votes
3answers
998 views

I accidently zipped my whole server

Alright if anyone wants to play god and work miracles i'm down. So, i was given the task of making a script that found files that are older than 6 months, zipped them and then deleted them. On my way ...
11
votes
5answers
10k views

How do I mount sshfs at boot?

Using a NAS box as 24/7 file server, I'd like to use sshfs to connect to it from an Ubuntu 9.04 desktop. Currently, I have this line in the desktop's fstab: sshfs#jldugger@storage:/mnt/HD_a2/ ...
10
votes
5answers
954 views

Recommended way to disable a service in Debian

Is there a "recommended way" to disable a service in Debian? (Disable = The service is installed but won't start automatically when the machine boots.) I know that you can update-rc.d -f service ...
10
votes
2answers
19k views

Dual boot from USB flash drive?

Is it possible to dual boot from a USB flash drive? Also is it possible to boot the operating system from an ISO image (like the Ubuntu Live CD)? How would you go about doing this and what software ...
10
votes
3answers
4k views

How to configure “On-Access Anti-Virus” for a faster boot?

I am in the process of trying to optimize the boot process of our 700 Windows XP workstations, we regularly have complaints about the start-up and login times on site workstations. Looking at this in ...
9
votes
9answers
24k views

How to repair/restore ubuntu 10.04 after 'sudo chmod / 777'

See Also: Why is “chmod -R 777 /” destructive? I changed file permissions recursively on the root directory / by executing sudo chmod -R / 777, and after that my system won't ...
9
votes
2answers
968 views

How much data does Linux read on average boot?

I wonder how much data in total does a freshly installed vanilla Linux system (like 32-bit CentOS 5.10) read in order to get to a virtual console shell prompt? You know, reading all the configuration ...
9
votes
1answer
2k views

combine partitions to one disk image

I have 3 images. Each image was done by cloning (by dd) a partition (these partitions formatted using ext3 file system). One partition is boot-able with GRUB1 (CentOS) How can I combine them to one ...
8
votes
2answers
13k views

Run a bash script after EC2 instance boots

I have a script on an EC2 instance that remotely starts another instance. Once this instance has fully loaded (finished booting) I want it to automatically run a bash script, what would be the best ...
8
votes
2answers
17k views

IBM Server takes a long time to boot past UEFI to OS

I have a pair of IBM System x3620 servers. These servers do fine once they finally reach the point where the operating system takes over, but it takes them forever to get past the new-fangled UEFI ...
8
votes
2answers
1k views

Server 2008 R2 boot is at 2 hours and counting. What now?

This morning, we rebooted our Server 2008 R2 box. No problem, came right back up. Then we shut it down and let it install windows updates. While it was off, we added some RAM. Then we turned it back ...
8
votes
1answer
18k views

Server 2008 stuck in reboot loop “Configuring Updates: Stage 3 of 3”

Our server performed some updates last night and this morning we came in to find it stuck in a boot -> "Applying System Configurations" -> "Configuring Updates: Stage 3 of 3. 0%" -> reboot loop. Safe ...
7
votes
4answers
7k views

How to make my HP server boot faster?

I have an HP ProLiant DL370 G6 server that I am using as a workstation. It takes 60 seconds during reboot and cold boot before screens post with a discrete Radeon HD6xxx GPU. What can I do to make ...
7
votes
4answers
568 views

What does booting in to Windows in safe mode do?

How is booting in to Windows in safe mode different from a normal boot?
7
votes
4answers
10k views

Inaccessible_boot_device after installing KB2919355 on Server 2012R2

I have a server 2012r2 machine that I just installed KB2919355 (the mega 800+MB patch recently released for Windows 8.1 and Server 2012). Server is a Dell Poweredge R715. Disks are 2x500GB SAS in ...
6
votes
3answers
5k views

How to free up space on RHEL6 /boot safely?

I am trying to do yum update on RHEL 6 box and I am getting this error message Transaction Check Error: installing package kernel-2.6.32-279.9.1.el6.x86_64 needs 10MB on the /boot filesystem ...
6
votes
4answers
2k views

Server 2008 R2 requires 2 disks to boot

Weird one. I have a domain controller with Server 2008 R2. It is a hack job but is reliable. AMD system. AM2 6000+ Asus Crosshair MB. The server is utilizing 5 Sata ports for Hard disks of assorted ...
6
votes
6answers
12k views

How to troubleshoot slow Windows XP boot?

I have a Windows XP x64 SP2 machine that used to boot up really quickly, but now takes a very long time. If I enable the /sos boot switch it gets to the bit where it says: 2 system processors [8191MB ...
6
votes
1answer
500 views

Providing normal users(non-root) with initialization and shutdown auto-run capabilities

I'm hosting an experimental/testing Linux box, running Debian Wheezy 7.4.0 distribution. Different users log into the machine over ssh to their accounts and are allowed to run the development tools ...
6
votes
4answers
174 views

control startup order of several servers

I'm looking for recommendations on how to control the startup order of a rack of machine should they all need to be booted back up. In more detail: Group1: DHCP/DNS/LDAP Server Group2: NFS ...
6
votes
2answers
6k views

Dell PERC 4 (PowerEdge 2850): Unresolved configuration mismatch between disks(s) and NVRAM

We had an extended power outage (almost four hours); now I have a Dell PowerEdge 2850 server which is giving me this error (from a PERC 4e/DI) on boot up: All drives are listed in the PERC ...
6
votes
1answer
910 views

SAN booting Oracle VM from a UCS blade

We have an Oracle VM Cluster that we are provisioning on a Cisco UCS B series blade chassis. It has 2 fabric interconnects (FC0 and FC1) provisioned to the (3) Oracle VM service profiles and it is set ...
6
votes
3answers
758 views

Timing issues with OpenVPN and NFS mounts (Debian Squeeze)

I'm trying to mount NFS filesystems over an OpenVPN link on Debian Squeeze. The problem is that the default layout of init scripts and such tries to mount the NFS filesystems before bringing up the ...
5
votes
2answers
38k views

How to list services/daemons started at boot _and_ check their loading order

I want to be sure in what order services are started during boot process in Debian based systems (Debian Squeeze in particular). Thanks in advance.
5
votes
3answers
3k views

Getting NFS clients to retry mount if NFS server down when client boots

I have an NFS server that several clients mount. I am using the following in my /etc/exports on the server: /content *(rw,no_root_squash) and on the clients in my /etc/fstab I have: ...
5
votes
4answers
451 views

Linux/Windows dual boot

I have a system running Ubuntu 9 and would like to install Windows 7 RC on it in a dual-boot configuration. Is there a way to make Windows play nice with grub or am I going to have to install Ubuntu ...
5
votes
5answers
453 views

How to boot quicker?

My WinXP computer takes a good 10 minutes to get to a usable state. Most of the activity will stop if I leave it at the log in screen, so I think it is some system level (as opposed to user level) ...
5
votes
2answers
5k views

Find out which Group Policies take forever to complete at boot

I want to analyse which group policies are inflating the bootup time. What's the best way to do so? Something like gpresult including timestamps/periods would be really helpfull!
5
votes
4answers
42k views

How to boot ISO image using gpxe and memdisk?

I have a repository of an ISO images (many different OS installers in ISO format) under http://myrepos/*.iso. I would like to boot from that repo using gPXE (with/without memdisk if necessary) and ...
5
votes
2answers
2k views

What to do with suddenly unreachable non-logging EC2 instance?

I have an EC2 "micro instance" running Canonical's Ubuntu 10.04 LTS. Has been running for 6-9 months now, infrequently rebooted (once every few weeks at the most). I just did what I thought was a ...
5
votes
2answers
14k views

how to install OS remotly using Supermicro IPMI?

I have detected server that I can access using supermicro IPMI. I need to reinstall the OS (linux centos 5) because the current OS cannot boot (kernel panic problems). how can I do that?
5
votes
2answers
2k views

How to set systemd service dependencies?

During CentOS 7 system boot nginx start fails with the following error: 2014/08/04 17:27:34 [emerg] 790#0: bind() to a.b.c.d:443 failed (99: Cannot assign requested address) I suspect this is ...
5
votes
2answers
215 views

Moving an existing Linux into an LVM

We have a server with an existing Linux installation (CentOS 6) + boot partition on disk 1, and an empty disk 2. What we'd like to setup is this: One disk (1 or 2, doesn't matter): The main system ...
5
votes
2answers
3k views

Linux boot on a raid1 software raid?

I am trying to convert my single disk boot to a raid1 boot So far here is what i have: I sucessfully create the raid 1 as degraded with the new drive alone, I copied all the data on it I can mount ...
5
votes
4answers
3k views

How do you make a WinXP bootable USB drive?

How do you make a WinXP bootable USB drive? I've seen a bunch of instruction here on ServerFault but they are specific to Vista or Linux, so again - I'm using WinXP. I've also tried unetbootin, but ...
5
votes
3answers
3k views

IBM x3650 will not boot from USB

Hello serverfault community, and thank you in advance for your time. Summary: I have an IBM x3650, which I bought secondhand (eBay). I am trying to install and run VMWare ESXi 5.5 on it via a USB ...
5
votes
3answers
1k views

Broadcom BCM5716 Hangs on CentOS 6 Boot

I have a fresh CentOS 6 installation on a Dell R310 server with a Broadcom BCM5716. The onboard NIC is causing the boot to hang for some reason. Welcome to CentOS Linux Starting udev: udev: starting ...
5
votes
3answers
2k views

Ubuntu 10.04: disk check at boot takes a long time

Every so often at boot time the disk checker runs. It completes ~70% very rapidly, and then takes about an hour to complete the remaining 30%. I know I can cancel it, but presumably it runs for a ...
4
votes
2answers
3k views

Why does Ubuntu 9.04 reset my Windows clock?

I've got a rig with 2 hard drives. I've put Ubuntu 9.04 (Jaunty) on one of the drives and Windows Vista SP2 runs on the other drive. I went with this approach rather than dual boot since I wanted to ...
4
votes
2answers
11k views

How to run script on first boot?

I need to run some bash script only once on first boot (after OS installation) of my CentOS machine This script should run before network service start (because this script will change network ...
4
votes
2answers
2k views

Debian - Stopping MySQL from booting at start

I have MySQL on my computer for development purposes, but most of the time I don't use it. How can I configure my Debian so it won't start MySQL at boot, but only when I tell it to ( using service ...
4
votes
3answers
116 views

Moving Windows 2003 boot+system partition

I have a Windows 2003 server with: - C: (15 Gb boot+system) on an old PATA disk - G: (20 Gb empty) on a SCSI hardware RAID - H: (220 Gb datas) on the same SCSI RAID I want to move C: to the RAID. I ...
4
votes
7answers
16k views

How can I get my License Key from a boot CD?

We recently acquired a server that's been in use for a while, but no associated software, logins, etc. We attempted to blank the administrator account password, but that didn't work. We also tried ...