Ubuntu Servers :: /tmp Cleared On Server Reboot?

Jul 26, 2011

I installed 11.04 server and had samba share /tmp (as advised by the server pdf doc) shared to my windows 7 laptop, which was all well and good, so copied some files to it and rebooted the server, and they had been removed.i guess i shouldnt have put anything in /tmp as i presume this is cleared on reboot, so why did the documentation advise to create /tmp share?

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Security :: Grub.conf File Has Been Cleared On RHEL V4.7 Server

Mar 26, 2010

I am running Red Hat Enterprise Linux AS release 4 (Nahant Update 7). The server was recently rebooted and wouldn't come up. After some investigation we found that the system would not boot because several files had been zero'd out (not deleted):

* All of these files had a date of March 11, 2010 with a time 03:46
* A zero byte file called /halt was also found with a date of 08:46

We could manually boot to the latest kernel, but none of the startup scripts would run. We analyzed the system looking for any file created on March 11 that were also 0 bytes. Once we had a list, we were able to determine that the system could be recovered without a full blown reinstallation of the OS.

We did a rescue boot from the installation CD, mounted the system volume privately, and edited the grub.conf file. We then brought up the network and copied the needed files from another RHEL v4.7 system. Rebooted the server and check the OS, databases, and apps.

My question is - Has anyone seen this behavior before? I seems like we may have been cracked or at the very least someone has cleared the files needed to recover the system smoothly.

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Ubuntu Servers :: VMWare Server Does Not Start After Reboot

Nov 30, 2010

Ok so I followed the instructions here [url] and this works great for the install however if the machine is rebooted the VMWare server refuses to start back up stating that it knows that its installed but it was not installed with the right installer.

This is on a Dell Server I can't remember the model right now but its got Dual PIII in it. I'm running Ubuntu Server 32bit 10.10 on the box as well. Thank you in advance for your assistance with this. Once I get this first server figured out I'll get my other one fired back up.

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Ubuntu Servers :: Best Practice To Reboot Server Remotely?

May 23, 2011

I'm writing you to ask some help with administrating a server remotely.
I have a machine I use remotely when I have to travel, some time for quite long periods like from one to three months.
Last time it happened to me that after upgrading I send the reboot command
and the machine didn't turn down, so I couldn't be able to access it.
My question is: how can I avoid such situations?
Is there any best practice to follow?

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Ubuntu Servers :: How To Start Automatically Vsftpd In Server After Reboot

Aug 5, 2010

how to start automatically vsftpd in my server after reboot?

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Ubuntu Servers :: 10.04 Server RAID5 LVM Failing After Reboot Due To It Using The /dev/sd* Designations

Dec 5, 2010

I'm a light linux user over the last couple of years and I decided to built a HTPC/NAS device.

40gb ide -> usb boot drive
3x2tb sata (4k Sector) drives

I've got another 2tb identical drive but it's holding data that is going to be copied to the raid after it's up and running and then be 'grown' into the raid array to yield a final 5+tb array. I tried doing a disk util raid array and it ended up failing after reboot due to it using the /dev/sd* designations and they swapped. I have no idea how to do the UUID version, my googlefu and practical guide to ubuntu. So I decided to do it manually in order to also fix the sector issue as disk util wasn't formatting them correctly and once formatted wouldn't let me create a raid array from the discs.


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Fedora Servers :: Can't Reboot Or Shutdown Server

Feb 25, 2011

After a couple of days, some commands related to the disk (df) or files (ls) or killing process (kill -9) doesn't respond. Even I can't reboot or shutdown my server. After an hard reboot, some files are not here anymore or the log files are not filled anymore until I restart.My disk are behind the RAID controller i6 and are configure in RAID 1. The disks are two HP SCSI 72,8GB 10k RPM.Maybe I am totally wrong to check the disk access side, so I am open to other explanation.I can also add that my CPU is running under 1% et my RAM under 10%.

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Ubuntu :: Don't Want Cookies Cleared?

May 17, 2010

when I quit Ubuntu Forums, I getvBulletin MessageAll cookies cleared! When I restart, I have to LogIn againWhere do I fix it, so that Cookies are not cleared on LogOut?(I'm using Win2K and FireFox 3.6.3)nFireFox Privacy Clear History when FireFox closes.ccept cookies from Third Party is checked

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Ubuntu Security :: Ecryptfs: Keyring Not Cleared On Logout?

Jan 17, 2010

On a fresh karmic install, I have a user account with ecryptfs enabled home directory. I want that directory to be secured when I log out.

I have two administrator accounts, user1 and user2. I log in as user1 (with ssh, will test regular logins tomorrow), /home/user1/.Private gets mounted to /home/user1, everything is fine. I log out.

I log in as user2, and /home/user1/.Private is indeed unmounted. But I can do

sudo su - user1
which will ask me for the password of user2, and then I am logged in as user1, /home/user1/.Private is again mounted, without ever typing the password of user1.
On the other hand if I invoke


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Networking :: Established Connections Not Getting Cleared

Apr 13, 2009

We are having an issue with our application where once we start making a few hundred connections to our Linux server, our connections are staying in the established state. When our app is working fine, the client sends a basically a heartbeat every five minutes. It is all nice and clean, receives the FIN and shuts down and that's that. tcpdump as follows:

12:53:10.965206 IP serverA.xxx.xxx.com.40315 > serverB.xxx.xxx.com.1234: . ack 2 win 46 <nop,nop,timestamp 3299017001 2043788445>
12:58:10.892878 IP serverA.xxx.xxx.com.40322 > serverB.xxx.xxx.com.1234: S 494392992:494392992(0) win 5840 <mss 1460,sackOK,timestamp 3299316941 0,nop,wscale 7>
12:58:10.894882 IP serverA.xxx.xxx.com.40322 > serverB.xxx.xxx.com.1234: . ack 3318963465 win 46 <nop,nop,timestamp 3299316941 2044088355>
12:58:10.894886 IP serverA.xxx.xxx.com.40322 > serverB.xxx.xxx.com.1234: P 0:78(78) ack 1 win 46 <nop,nop,timestamp 3299316941 2044088355> .....

Then things start getting busy, and it ends up looking like this:
01:28:10.493760 IP serverA.xxx.xxx.com.41132 > serverB.xxx.xxx.com.1234: S 774853781:774853781(0) win 5840 <mss 1460,sackOK,timestamp 3344315513 0,nop,wscale 7>
01:28:13.491231 IP serverA.xxx.xxx.com.41132 > serverB.xxx.xxx.com.1234: S 774853781:774853781(0) win 5840 <mss 1460,sackOK,timestamp 3344318513 0,nop,wscale 7>
01:28:13.491755 IP serverA.xxx.xxx.com.41132 > serverB.xxx.xxx.com.1234: . ack 3597595480 win 46 <nop,nop,timestamp 3344318513 2089089105> ....

What could be the cause if the fin was received at 01:28:13.492743, but hours later this connection is still established:
gateway 16514 root 111u IPv4 2714750 TCP
serverB.xxx.xxx.com:1234->serverA.xxx.xxx.com:41132 (Established)
There is no corresponding connection in the client's netstat.

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OpenSUSE Install :: /etc/sysconfig/bootloader Cleared By Update?

Aug 14, 2011

I use full encryption on this net-book, with the help of LUKS. One key part of the setup is to configure /etc/sysconfig/bootloader with the initial boot options (along the lines of

root=/dev/mapper/root luks_root=/dev/sda5 luks_home=/dev/sda5 luks_swap=/dev/sda2 luks="root home swap"
). That way a kernel update is installed properly, usually...


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Ubuntu Servers :: Lost GUI After Reboot?

Apr 25, 2010

I was using Ubuntu 9.10 and was using fireftp ( firefox plugin ) to do some ftp operation. And then I noticed firfox is fozen so I reboot my pc by switching off the power ( restart doesn't work ). When I turn it back on again, no GUI anymore. I was taken to ttyl login commend.

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Ubuntu Servers :: How To Get Into GUI On Reboot After Installation

Nov 8, 2010

I just finished installing Ubuntu Server Edition 10.10. After reboot it brings me to a shell prompt asking for username and then password. After putting it in I just get a blank shell prompt. How do I get into the GUI ?

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Ubuntu Servers :: SSH Not Starting On Reboot

Nov 29, 2010

I have set up a new IP specifically for SSH and configured SSHD_Config accordingly to listen on this new interface and a specific port. However when I reboot SSH is not starting. Looking in the syslog it shows that it is unable to start. It looks like its trying to listen on the interface before it is set up.

Nov 29 13:00:23 anubis init: ssh main process (601) terminated with status 255
Nov 29 13:00:23 anubis init: ssh main process ended, respawning
Nov 29 13:00:23 anubis init: ssh main process (610) terminated with status 255
Nov 29 13:00:23 anubis init: ssh main process ended, respawning
Nov 29 13:00:23 anubis init: ssh main process (618) terminated with status 255
Nov 29 13:00:23 anubis init: ssh respawning too fast, stopped

I am able to start SSH manually once the server is booted. Do I need to set up my interfaces differently to ensure they are available prior to SSH starting somehow? I don't want to change my ssh config to listen on all addresses.

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Ubuntu Servers :: ISCSI + LVM Gone After Reboot?

Feb 21, 2011

I have an iSCSI target on my Ubuntu 10.04 LTS server that is giving me access to 3 x 2TB volumes. I am using LVM to create 1 big volume and using it as a place for my backup software to write to. Upon initial setup I tested to see if the connection would still be there after a reboot, and it was. After going through the trouble of configuring my backup software (ZManda) and doing a few very large backups I had to reboot my SAN (OpenFiler) for hardware reasons. I took my server down while performing the maintenance and brought it back up only after the SAN work was done. Now, the LVM volume is listed as "not found" when booting.

Using iscsiadm I can see the target but LVM doesn't know of any volumes that exist using those targets. I need to get it back up and running and then troubleshoot the reboot issue.

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Ubuntu Servers :: Automatic Unmount On Reboot?

Apr 1, 2010

I have a problem while rebooting my 9.10 server when I have SAN partition mounted. The message is something about the swap that can not be cleaned during the process. All works if I unmount the partitions before shutting down or rebooting.So I though to create a bash script that unmounts the parts during runlevel 0 and 6.I've created a simple script like this in /etc/init.d:

umount /mnt/xxx
and the I've done:


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Ubuntu Servers :: Bond0 Not Starting After Reboot?

Apr 10, 2010

I am having problems with bond0 starting at boot on ubuntu server 9.10. After I do a restart I have to manually start the network with "ifup bond0". I have installed the built package (ifenslave-2.6_1.1.0-15ubuntu1_i386.deb (as indicated in Bug #482419)).

I have setup bonding for mode=6 with miimon=100 using eth0 and eth1 (both are Intel 10/100/1000 ports using an aic79xx network driver).

The contents of the aliases file are:

alias bond0 bonding
options bond-mode=6 miimon=100

The contents of the interfaces file are:
auto bond0

iface bond0 inet static
slaves eth0 eth1
bond-mode 6

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Ubuntu Servers :: High I/O Wait After Every Reboot?

May 19, 2010

The Machine

Core 2 Duo E4600
2GB DDR2 RAM (1 stick)
Intel ICH10R based motherboard (tried an ICH9R aswell)
4-port SATA controller (PCI Sil 3114)
O/S: Ubuntu Desktop x64 10.04 LTS (using 'desktop' because I like having a remote desktop)

The Storage Setup Disks: Assorted selection of 9 disk. 750GB, 1000GB and 1500GB Seagate and Western Digital disks. The disks are joined through a standard LVM2 configuration. I don't know the LVM term, but normally you'd call it a JBOD setup. On that LVM device, I've put a cryptsetup device, made with the LUKS tools (aes-xts-plain 256) On the cryptsetup device, I've created and mounted an EXT4 partition.

All in all, a completely standard LVM2 and LUKS setup, running EXT4. After a reboot, I proceed to unlock my cryptsetup encryption device, and then mount the EXT4 partition. All is well, the mount is accessible and everything looks fine. I then try to send a file to the mount, via Samba. After a few hundred MB written, the I/O wait goes berserk. It stays at 50% (dual core setup remember). The system becomes unresponsive to network commands (can't browse samba) for about 5-10 minutes. When it finally responds, the I/O wait is gone and everything is now fine. I can write and read hundreds of GB's of data without any issues at all. I can benchmark and stress all disks perfectly fine and no logs are showing disk errors.

I tried monitoring my disks with 'iostat -d 2' while the I/O wait was happening, and there is some slight Blk_read/s activity on 1 disk at a time. First for example /dev/sda is showing a little Blk_read/s acitivty, then it jumps to the next disk, and when every disk has show that slight Blk_read/s activity (500-800 or so) the problem is gone and the I/O wait is no more. I've tried changing motherboards, switching disks around on the controllers, checking individual disks, replacing disks and I've tried different versions of Ubuntu. The problem however persists. I could see it being a network issue, possibly a driver issue. But since the NIC is a standard RTL8111 on-board it seems unlike that the problem wouldn't be more widespread since this NIC is litterally being used everywhere. I did change my motherboard, so a faulty NIC seems unlikely twice in a row.

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Ubuntu Servers :: Updates That Needs Reboot Timeline

Nov 5, 2010

Where can I find the updates time line that requires Ubuntu server reboots for this year? Is there such a list ?

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Ubuntu Servers :: Upgrading Kernel Without Reboot

Dec 16, 2010

I have an Ubuntu 8.04 server running 2.6.24-23-server. I have a godaddy account and I am trying to upgrade my os version to 10.04, which requires a kernel upgrade. I have tried ksplice but kernel 2.6.24-23-server is not supported. I have heard about screen sessions but I have not found it possible to reboot one screen while having the other screen stay persistent if it is possible.So the main question is how to update Ubunut 8.04 to Ubuntu 10.04 with out rebooting the entire server? Rebooting is completely not an option at the moment.

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Ubuntu Servers :: RAID1 Disappears After Reboot?

Jan 5, 2011

I had a thread earlier asking for help installing Ubuntu Server to my homemade atom based NAS, but I gave up on that (GUI's are more helpful to me ) and so now I'm running Ubuntu 10.10 Desktop 64bit edition.Last night I was finally able to get mdadm set up. I have two 1TB disks set up in RAID1 config. I used

sudo mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb1 /dev/sdc1
to create the array, and then waited until it finished assembling. Then I used System>Administration>Disk


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Ubuntu Servers :: Nss_initgroups_ignoreusers Is Recreated On Each Reboot

Feb 7, 2011

In /etc/ldap.conf I'm using my own nss_initgroups_ignoreusers setting. However, on each system start, Ubuntu adds its default nss_initgroups_ignoreusers line additionally to my own, and I have no idea where that comes from (needless to say, it's annoying!). So when I edit /etc/ldap.conf as follows:


# [...]
nss_initgroups_ignoreusers avahi,avahi-autoipd,backup,bin,couchdb,daemon,games,gdm,gnats,haldaemon,hplip,irc,kernoops,libuuid,list,lp,mail,man,messagebus,news,ntp,proxy,pulse,root,rtkit,saned,speech-dispatcher,sshd,statd,sync,sys,syslog,usbmux,uucp,www-data,backup

After I restart the system (and that happens on *every* startup), I've suddenly got two lines:


# [...]
nss_initgroups_ignoreusers avahi,avahi-autoipd,backup,bin,couchdb,daemon,games,gdm,gnats,haldaemon,hplip,irc,kernoops,libuuid,list,lp,mail,man,messagebus,news,ntp,proxy,pulse,root,rtkit,saned,speech-dispatcher,sshd,statd,sync,sys,syslog,usbmux,uucp,www-data,backup


How can I disable this 'feature'?

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Ubuntu Servers :: No Connection To SSH After Updates / Reboot

Apr 2, 2011

I'm running Ubuntu 10.04 LTS. Last night I was doing some admin on this box, it's running apache and ASSP for spam filtering. Once I finished I started some updates.I checked for updates and applied them, but fell asleep. This morning, my session had timed out at continue. I reconnected and saw a message stating a reboot was required.I've rebooted, my usual services are running, eg apache and ASSP. I can view pages on apache and the admin page for ASSP. I'm remote from the system, so connecting over the internet and when I try to connect, it fails.

Quite urgent, however at least my services are working. However I'm not happy that I can't access the system myself.I don't know if this is my own fault for leaving updates unattended or if an update caused the problem. Thanks.

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Ubuntu Servers :: Remotely Reboot Via Web Interface?

May 2, 2011

Is there any web interface that I can install to remotely reboot ubuntu? It would only be accessible via a VPN or on the LAN so not too much worry over security.

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Ubuntu Servers :: Reboot Command Shutting Down PC

Jun 6, 2011

I have problem with my reboot command.
sudo reboot and sudo halt -f now don't work (they don't reboot)
but sudo halt -p is shutting down my PC.

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Fedora Servers :: VNC After Reboot

Mar 14, 2009

Ok this is one of those questions that have probably been made often. But I just CANNOT find a way around this on Fedora, and i have searched for it alot. Basically, after remotely rebooting my server, i'm not able to connect through vnc because the server needs to login. I've looked into an automatic login, but this is not the way i want to go. Edit: I'm using the default fedora vnc server, and RealVNC on my Windows computer. Been to ##linux on freenode, but at the time, noone there could answer me either.

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Ubuntu Servers :: Forced Fsck Hangs On Reboot?

Jan 12, 2010

I am running 9.04 Server (standalone). It had been running fine since I installed in last autumn. Upon reboot, fsck of the root filesystem was forced and it hangs at the same point (16.5%) every time. I was able to break out somehow with cntl-alt-del but the boot was to a read-only filesystem. So I couldn't disable the forced fsck. Instead, I tried to fsck there. It started, but hung. I couldn't do e2fsck -v as it needed the device and, although I worked on UNIX systems for decades, I am not familiar with the /dev/mapper stuff.

Looking at other threads, all involving the desktop GUI Ubuntu, I tried some of the suggestions. Went into the BIOS to see what I could disable. I killed the serial port and similar. (Some said that onboard modems interfered with the checks in /dev.) I also tried to boot from my original installation disk. That does work.The suggestion is to choose "Try without any change to your computer". The problem is that is not available on the server installation, apparently only the desktop (GUI). I had install, check CD for defects, test memory, boot from first hard disk, and something like repair or recover a broken disk. I started the last of them, as it seemed to be the only option. It failed because it couldn't get a dhcp address. I could manually configure it (as it is hard addressed anyway), but I didn't want to start screwing up configurations not knowing where it was going, whayt it would ry to do, and risk losing months of hard work.

Without help, I think I will be forced to install the OS on a second drive, use that install to fsck the original filesystem on the original disk, edit the fstab (or whichever has the config) on the original disk to disable fsck, and return to the original boot.I am building this server for a nonprofit and have put in many hours writing mysql/perl apache cgi code for them as a free service and hate to lose it all and set back everything.

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Ubuntu Servers :: Script Not Executing On Reboot (with 755 Permissions)

Feb 18, 2010

I am trying to get a start up script to work, I have a file /etc/init.d/blah (with 755 permissions) with the contents [URL]. I have run "update-rc.d -f blah defaults". But when I reboot the script is not executing.

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Ubuntu Servers :: Reboot The System With A Linux CD To Do The Backup?

Mar 1, 2010

I have a personal ubuntu server that provides apache, glassfish, firewall, routing, email, CVS, MySQL, etc.... This server has been running for a while with two hard drives configured into a RAID 1 array. The array has two partitions, one for swap and one for the data. I currently back up the data with a removable hard drive. I use dd and create an image of one drive and the MBRs (partition tables) of each drive.In a disaster situation I can use this data to recreate one drive and then re mirror it to the second, or just boot the back up.I like this solution because I can easily recover from bare metal, and the backup is transparent. I can browser it if needed since its an uncompressed image of the drive. The one drawback is that I need to reboot the system with a linux CD to do the backup.

My hard drive space is almost at capacity. So what I want to do is add a third drive to the array and migrate it to RAID 5. However this will cause my current backup method to no longer work. How can I back up this RAID 5 array. I need to back up the entire system, and not just the data. I have made many tweaks to the system over the years that it has been running that I can't lose if a restore is needed. I have seen a large thread here that people have been using tar. My concern with tar is how do you use a tar archive to restore a system to a new array. Im assuming that you would need to setup the array and then just restore the archive? Also, i don't have much faith in using tar on a running system. Doesn't this open yourself up to corrupted backups? My second idea is using rsync. While I consider myself experienced in linux from 10 years of personal and professions use, I have not had much experience with this utility. Would rsync provide a more reliable way to backup a running system that would enable a bare metal restore later? I once read something about people using rsync with hard links to create a backup that could store many incremental backups.My main concern with both rsync and tar is not being able to restore the OS to the state that it was in at the time of the backup.

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Ubuntu Servers :: Clean Install Fails To Reboot

May 17, 2010

I'm installing 10.4 x64 on a Dell PowerEdge R610 RAID 1 and the install goes fine until I have to reboot the finish it. On reboot after about a minute it gives the error

Gave up waiting for root device. Common problems:
-Boot args (cat /proc/cmdline/
-check rootdelay= (did the system wait long enough?)
-check root= (did the system wait for the right device?)
-Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/mapper/mysql1-root does not exist. Dropping to shell!

what to do and my co-worker who knows a little more about Linux can't get it to let him check any of the above common problems.

We're tried letting GRUB manually configure itself at the end og the install before we reboot and we've also pointed it to /dev/sba partition which is what should be the boot partition.

EDIT: in the code tag it's ALERT! /dev/mapper/mysql(one)-root.... the L and 1 look the same

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