Server :: Retain The Data While OS Upgrade?
Jun 25, 2011
well, I have a redhat 9 server. it has a separate hdd mounted as /backup where I always used to take the backup tar files. Now I am planning to upgrade it to CentOS 5.5 Easy job. except that I want to keep the hdd same way for backup. And ofcourse without loosing any of my existing data.
Means, the current hdd i want to again use with keeping the data because I have to restore the whole thing just from that HDD and again that will be used for the backup also like before...
so advice on adding a new HDD without loosing data. And opps, the current backup HDD is accessible through /backup and I want to keep that too... but it is not a symbolic link... here is my current /etc/fstab
Code:
LABEL=/ / ext3 defaults 1 1
LABEL=/backup /backup ext3 defaults 1 2
LABEL=/boot /boot ext3 defaults 1 2
none /dev/pts devpts gid=5,mode=620 0 0
[Code]......
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May 10, 2010
I've tested a live CD of 10.04 and one of the things I can't let go for now is the beautiful splash and GDM theme of Ubuntu 9.10.
To me it's priceless. I tried installing
Code:
~$ sudo apt-get install gnome-splashscreen-manager
~$ gnome-splashscreen-manager
All these didn't show me where to locate the existing Splash and GDM themes.
I've been to [URL] but found it hard locating the items I seek.
where to locate these priceless splash and GDM of all time.
It's them or no Ubuntu 10.04 for me. I'm just okay with 9.10 for now
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Jun 11, 2011
I have a server program in ubuntu which i run using putty remotely. My problem is that when i closes my putty window, my server automatically closes and stop working.
I want that once i start my server it remains on when i closed my putty window.
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Apr 3, 2011
quesiton is how I can redirect http://www.thispage.com to http://my.page.com and still retail displaying http://www.thispage.com.The issue is if I point in httpd.conf to directory where my.page.com it doesnt work because it knows it address.
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Jun 28, 2010
I have an old Brooktrout ISDN fax card on BRI used mostly for receiving faxes. It works with windows fax server software which sends faxes to different e-mail boxes according to telephone number on which fax was send.
Since card is getting rather old and I don particulary like server software I wonder has anyone got any practice with linux fax servers. What I need is ISDN fax card and software which is able to save fax as a picture to file and somehow retain telephone number (filename or directory name). Sending picture by email is than trivial task.
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Jun 21, 2011
iam trying to sync file server data into backup server machine by command- rsync -avu path/of/data ipaddress-of-backup-server:/path/where/to/save after running it ask for root password and manually it is successful.but i want to make it automatic.for that i also tried cronjob and also generated authentication key but iam not successful in login automatically..anybody know how to authenticate root to login for storing data in backup server.
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May 15, 2010
I use a Karmic Koala and I want to upgrade to Lucid Lynx. All the packages are up to date. So if I upgrade online, how much data download am I looking at? I have a sufficiently fast connection, but I have a limit on the data that I can download. Is it less than downloading a Lucid Lynx CD? Can I get an exact figure somehow?
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Oct 2, 2010
I've got 10.10 running trying to recover files from 10.04/10.10 I don't know what to call it. I did update-manager -d but all I get is a bunch of failed packages when I try to run it, so I downloaded the full RC iso. Now I'm trying to recover my stuff from the HD using a live-usb. The only problem is, when I try to copy the files onto my SD card, I do not have permission to access some of the stuff on the HD and some of the stuff like the "Desktop" I do.
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May 4, 2010
Yesterday, I upgraded to the 10.04 verion of xubuntu. Looks fine. However, I keep my data on an NTFS partition of my dual boot laptop, and am finding that I can't access it.
I have a symbolic link to that mounted partition, and when I click on it, I can see the first level of folders, but I can't execute them (even though they seem to be set to 777) and I can't open anything...
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Jan 25, 2010
On my computer I have one IDE drive that is my boot drive and a mirrored SATA raid set. When I login as "root" and mount the SATA volume it's always there. When I logout or shutdown if I login as root it's always mounted. I want to do the same thing for my own user ID. I did a search on having volumes mounted when I boot but they seem related to older versions of Ubuntu. It almost seems like a permissions problem since the "root" ID mounts the volume when I boot and my user ID does not.
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May 23, 2010
Ive been having some really severe problems with compiz on my computer, and Im at a point of utter frustration.
I want to take compiz off of my computer, but I do not want to lose compositing effects, because I run docky (which needs it to run)
Essentially, the problem with compiz, in a nutshell, is that it continually freezes on me when I try to scroll a webpage too fast, or if a fast-paced flash video plays, or anything that might choke up the window manager does. I end up having to pull up a terminal, killall compiz, then restart it manually; it works again until I try to scroll too quickly or something and then it will lock up again.
I know I could run compiz on this computer, but I dont know why this current version will not cooperate, so in lieu of finding a solution, I kinda want to just purge it.
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Aug 30, 2010
My Acer laptop Travelmate 290 was fine till yesterday (ie) before full update.No Error.I have the recent Ubuntu. Later When I boot I can't find my cursor but I could randomly see pop up notification of Application----Places--- System could be read.When I open any folder its fixed to top of the screen and no button for minimise,max and close.When I dig thro all the forums and solved by reinstalling metacity and change the setting of Appearance-Visual Effects to Normal.When I set to Normal it scans for the driver and asking me to confirm the setting.Once confirmed all the above problems solved but it don't reatain it,it is jump back to none. I need to do this on every boot.Is any way to avoid this? Is anyway to clean all the compiz files and setting from the PC?I vaguely remember it may be because of uninstall of compiz.
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Jul 14, 2011
I installed Natty Narwhal on a brand new Ideapad Z570 and everything worked out of the box except wifi for which I had to blacklist acer_wmi.
I installed Google Chrome and replaced firefox with chrome in the launcher. So everything works fine until I reboot. Firefox is back. I saw this a couple of times so I though why not just get rid of firefox. Unfortunately now there's nothing in place of firefox.
I tried unity --reset but that just shows a bunch of errors. I have dconf-tools and libdconf0 installed.
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Jan 10, 2009
I've just upgraded from F9 to F10. I can boot okay but I seem to have lost some data in one of my logical volumes. My drive is organised as follows:
/dev/mapper/main_group-various: UUID="f7c452cf-9f03-4f97-8676-b71b07a812aa" TYPE="ext3" SEC_TYPE="ext2"
/dev/mapper/main_group-root: UUID="173f1845-72c9-49e8-9d49-2a5776c4267c" TYPE="ext3" SEC_TYPE="ext2"
/dev/mapper/main_group-music: UUID="f5411861-4614-4652-a5f5-a3a8c2efcdd3" TYPE="ext3" SEC_TYPE="ext2"
[code].....
The logical volume for work still seems to be there. I presume (and hope) that all the information in /dev/main_group/work is still there. How can the folders in /dev/main_group/work be retrieved?
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May 15, 2010
I tried a 9.10 -> 10.04 upgrade that went fail. I can now get it to the login screen where it gives a hard freeze. Same with recovery. I can get to a command line, but not with networking so
So I finally said screw it, I'm going to doa fresh install. I downloaded and burned 10.04 at work. Not, it is giving me an installer error when I boot from it, but then it will load the desktop from the LiveCD.
All I really want to do is grab some data that I didn't get when I backed up by home directory, then I can go back and do a fresh install. I can even download a new 10.04 CD if I need to because the installation files are screwed up or something.
The problem is that some of the files have permissions on that that show as an 'X' on the icon and it won't let me copy them to my USB backup drive.
How can I copy the files marked with an 'X' that have this permission issue?
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Dec 1, 2009
I use NX Server 3.4.0-8 and GNOME desktop and I connect through NXClient 3.4.0-5 on Windows 7 pro 64bit.
I have some problems, first is that I use beesu and through the physical console, it asks me once for my password and then remembers it as long as the passwd timeout is set on sudoers file. But when I connect to my desktop through NX, beesu asks for mypassword all the time not honoring the save timeout setting.
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Nov 4, 2010
Is there a way to disable gnome panel but retain the launcher(Alt+F2)?....or an alternative for the purpose? I want to switch to a dock..
Edit: I'd also like to retain the key bindings
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Mar 6, 2011
I had a blue-hue issue with VLC and Totem.
I re-set the hue on VLC. Everything looks fine. Unfortunately, when I restart VLC it goes back to the blue-hue.
How do I get VLC to retain the hue?
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Jun 3, 2011
I have a couple of videos that end with the extension: .mp4.dap the videos, apparently, were .mp4 but instead are not .mp4.dap where .dap are DarkAdapted Presets File. arkAdapted is a software which applies a red or green filter to the screen to help your eyes get dark adapted.
I thought that Linux in general & Ubuntu in particular allows changing the video format by simply changing the extension name, but this doesn't seem to work now; i recall it once worked sometime ago. Am I mistaken or what ?
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Dec 13, 2010
I plan to use our RHEL6 server as a host for three virtual database servers. When allocating CPU and memory, how much do I need to retain for the the host?
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Jan 17, 2011
I have to save the result of ssh/grep into a file to keep the eol ("/n"):
ssh $SSH_OPTIONS $USER@$NODE "cd $LOG_DIR; grep -h '$pattern' log.*" > $file
So that when I grep on the local file again later, it can be printed out with original log lines. Otherwise, the log lines will be dropped and lines becomes concatenated into a single line, e.g., if I rewrite the script in this way, echoing the $result is not a good idea..
result=`ssh $SSH_OPTIONS $USER@$NODES "cd $LOG_DIR; grep -h '$pattern' log.*"`
is there some workaround that I can save it to a variable rather than file but still keep the eol? That will simplify my script and don't need to do all those I/Os!
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Aug 30, 2010
I have been using Debian for 3 or 4 years, I have never used LXDE before. After several attempts and searches through google, I succeeded to change the screen resolution to 1024x768 but LXDE is retaining this resolution for only one session: I have to change the resolution every time I use LXDE.
This is what I have in ~/.config
edbarx@edbarx-pc:~/.config$ ls -l
total 72
drwxr-xr-x 2 edbarx edbarx 4096 Mar 19 14:41 akonadi
[code]....
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Mar 13, 2010
I need only one of the lines having the same ending. It does'nt matter which lines to discard as long long as one with the same ending is retained. Of course I have to retain any unique lines too.
myfile:
aaaa bb 12345
ccc aaa 1234
abc de zzzzz
b cc dd
[Code]....
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Jan 9, 2010
I use Okular to create bookmarks in my pdf files, but those bookmarks won't appear in WinXP (Adobe Reader). Same problem when I use xpdf or ePDFViewer in slackware.
Are there any tools/apps in linux which can create PDF bookmarks & retain them in other PDF viewers? I don't want to buy & use Adobe Acrobat just for this function.
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May 23, 2010
Getting tired of gnome, I decided to switch to kde4. I finally understand how it works (the idea of plasmoids), but I'm having some pretty irritating issues with them.
Whenever I try to move my plasmoids to another part of the screen, or even try to resize them, they immediately snap back to their original position / size.
My first thought was a permission error on my ~/.kde directory, but a quick chown/chmod indicated this is not the case.
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Jan 15, 2011
I have 2 servers each one with a RAID and I want them mirror they data so if one of them goes down the other one take the job with out disruption. I've heard of multipath by I want to know it in detail or learn of more options.
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Dec 16, 2010
Last week my server crashed. I'm trying to diagnose the cause.
This is the relevant error message in /var/log/messages:
Code:
I'm assuming that I can conclude, then, that apache/httpd was the cause of the memory leak?
Next, I've been tracking my memory usage. Using top, this is an average memory load level for my server:
Code:
I'd like to confirm if my understanding of this data is correct, because Plesk indicates that my memory usage is only 50% or less. (Though I have read a number of reports indicating that Plesk's measurements are frequently wrong.)
Top says: Of the 2,073,156K total memory, 1,982,572K (95.63%) is being used, 90,584K (4.37%) is free. Of that sum, 421,948K (20.35%) are being used as buffers. Additionally, of the 2,096,472K of Swap, 60K is used, and 887,700K (42.34%) is cached.
My questions: Is my memory actually being 95% used? Or is the buffered quantity (20.35%) not a use of physical/virtual memory? (i.e. is it disk usage?) Does the amount of cached Swap influence the percentage of physical/virtual memory being used?
In other words, who is correct? Plesk says I'm using 40-50% of my memory, whereas top says 85-95%.
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Jul 16, 2011
I am unable to use ncftp command I have defined all variables used. i have to copy the data to another server FTPS. When i am executing this command it is throwing error
ncftp -u : option unknown
I am copying total script what i am executing in my server. Please some one tell me is there any pistake in using the ncftp command , or tell me some other commands to copy data to remote server
BAK="/opt/DBbackups"
NOW=$(date +"%d-%m-%Y")
FTPU="username"
FTPP="password"
[code]....
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Aug 1, 2011
I have configured openssh 5.8p2 with centos 5.6. My sftp is working fine with chroot environment but i am having problem with SCP. I am dealing with muliti Redhat servers. When i try to transfer data from other linux server through scp it gives connection refused. For e.g ssh 5.8 is configured on new server and i want to transfer files from old server which is using openssh 4.3 version.i created same username and password on new server as on old server.My sftp users on new server has no shell access but only sftp access. When i try to scp from old server to new server it gives error connection refused. Is the below configuration only for sftp and can't scp? According to google the configurations i found are for scp and sftp. Do i need to generate ssh keys by giving users on new server shell access, once created then stop shell access again, as i dont want to give shell access permanent for security reasons? but i want to use ssh keys for more security as well.
Port 22
PermitRootLogin no
1.override default of no subsystems[code].....
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Jan 25, 2011
I've got 4 identical 1 TB drives and would like to use them in a software RAID configuration on my home server. I'm running Debian Linux using 'mdadm' utility to manage the software RAID. I don't know how much I've read is fact or dated or even false so I decided I would ask here to get help from people who know more about this than I do. This is essentially just a file server machine to store all my data so being that I've got four identical SATA hard drives, I was thinking about doing RAID level 5. I guess I'll start here and ask if that is the recommended level of RAID. I think RAID level 5 will be fine for my general server usage. My second issue is partitioning the four individual drives to get maximum performance / space from them. Basically just asking here how would you or you recommend I partition the drives? I was thinking about doing three seperate partitions per drive:
/dev/sda1 = 4 GB (swap)/dev/sda2 = 1 GB (/boot)/dev/sda3 = 995 GB (/)Now from that partition schema above, obviously all the types will be 'fd' for RAID and the partition for /boot is going to be bootable. My confusion is that I read Grub doesn't support booting from RAID 5 since Grub can't handle disk assembly. If /dev/sdx2 (sda2, sdb2, sdc2, sdd2) are partitioned for /boot (bootable), how would you guys configure this RAID to match up equally? I don't think I do a RAID level 1 on 4 identical partitions, right?
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