General :: Specific "nesting Tree" Should Be Using?
May 9, 2010
I am building my first Linux file server, for my home network. I'm also trying to use older spare components I already own, so I won't unduly stress a tight family budget.
First, the issue: I cannot create more than four partitions on a given drive. I believe I remember reading somewhere that drives are limited to four primary partitions, but that its possible to "nest" multiple extended partitions within a single, larger, primary partition.
What I have been unable to find so far is anything to tell me what, if any, protocol I have to follow to accomplish functional nesting. Is one partition-type or mount point better than another for the primary? Are certain mount points better or worse for use as the nested partitions? Is there a specific "nesting tree" I should be using?
Here's some specs on what I'm working with: I have a 64-bit mobo with AMD 4800+ x64 in an Antec full-tower case, with 750 W PSU. I used the mobo's built-in Nvidia RAID controller to create a mirror with matched pair of 300 GB SATA hdd. Two additional mirrors are created through an SLI-PCI-IDE card: one with a pair of 250GB IDE hdd and the other with pair of 80 GB IDE hdd. I also have a stand-alone 13.2 GB IDE that I plan to use as the /swap drive, regardless of any other partitioning decisions. Also have a 200 GB IDE, on mobo cntrllr # 2, Mstr, with no particular purpose right now. I originally attempted to use Ubuntu 9.10, but apparently it did not install a boot-loader, and I was unable to make any of the suggested GRUB-loader tools resolve that issue. So I am currently using SUSE 11.2. (If there's a better option for my needs,please shout it out. There's no better time to switch boats than while you're still docked!)
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Jul 19, 2011
I would like to overwrite files in a directory tree, recursively. The ones I would like to overwrite match the filename "x_alpha*.png" and have a size exactly 456 bytes. Is there any way to search for these recursively in a directory tree, and overwrite them with a reference file, for example "e:mydirgood.png"
I am using Windows 7, but I have UnxUtils, so I can use those too. What I am looking for is something like this, generated automatically:
copy /y e:mydirgood.png e:mydiracx_alpha0023.png
copy /y e:mydirgood.png e:mydirefgx_alpha0045.png
copy /y e:mydirgood.png e:mydirhx_alpha0248.png
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Apr 12, 2010
I am trying to write a simple program in C that involves nesting switches. For example switch 1 offers an option to go to module 1 or 2 or quit. when I go to module 1 there is another switch function offering two or more choices.
I can select either module 1 or 2 at the start of the program and the selection text for, say, module 1 prints to screen but then exits without allowing a second selection to be entered.
I tried using free([first selection]) thinking that might do the trick but it doesn't.
Is it possible to next switches on after another in C?
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Dec 2, 2010
for example
else {
for fileDOC in $location/*.doc
do
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Sep 27, 2010
I am trying to use the cp command to copy some files around but want to preserve the entire folder structure. Example:
Then within the /backup location I want to see /backup/folder1/folder2/file.
I have tried cp -a and cp -p but neither give me the above.
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Apr 28, 2010
The command: Code: ls -lRt Shows a recusrive listing, and sorts by modification time. But this in in tree fashion, where it first lists the contents of the current folder sorted by time, and then the contents of each child folder sorted by time. How would one accomplish this type of sort, but with an aggregate listing - all items recursively sorted together, rather than by individual folder?
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Sep 26, 2010
I am working on a project where I need to use the C language to generate a tree of processes. I understand how fork() works but I cant seem to get fork() to create two children from one parent and then have the two children create two more children.
Right now what i am seeing is a chain...where the parent creates one child...and that child creates another ONE child..etc.
Here is what I have so far:
for (i=0; i<n;i++){
if (childpid = fork()) break;
}
if (childpid == -1){
perror ("
[Code]....
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Oct 29, 2010
Are there any other archiving tools than tar that preserve Linux file permissions and user/group flags? I want to create archives of a directory tree on my ubuntu box. The directory trees are large, a first run with tar cvpzf archive.tgz /home/foo/bar yielded a 5GB archive. I also want to keep all permissions and other flags and special files.I'm fine with a 5GB archive, however to look inside that archive -- since it is a compressed tar archive -- the whole 5GB have to be decompressed first! (Or so it appears when opening it with the archive viewer -- I'm happy to be corrected.)So I need a way to "backup" a directory (tree) while preserving full filesystem attributes and right and creating an archive with an "index" that hasn't to be decompressed for browsing its contents. An archive is either a single file, or a (small) set of files that carries full and complete information within this file/s. That is, it can live on any filesystem (size permitting), it can be burnt onto a DVD, you can split it (after which the point of this question is really lost - but still), ...
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Apr 10, 2010
I have a WD world book edition 1TB NAS drive, and just purchased an acomdata 1tb drive and connected it to the NAS via USB. If I recall I think the WD NAS has a ext_ or some type of linux filesystem on it, and the acomdata has a ntfs filesystem on it.
What I want to do is copy over certain directory trees of the NAS to the USB attached drive. I usually use MS synctoy to sync folders from my windows pc to the NAS drive, and MS richcopy to make the initial transfer from PC to NAS. For this operation though, since it is taking place entirely on the NAS and its connected drive, I thought that rsync would be the best option, and it is available on my NAS drive.
Last night I entered in rsync -avr /movies/* /usb1-1share1/ to copy the entire "movies" dir to the drive, which shows up as usb1-1share1 on the NAS drive. It copied most of the directory tree ok, but a lot of the folders were empty, so this morning I tried rsync -Carv --ignore-existing /movies/* /usb1-1share1/ to try and get all the files missed, without recopying the 24GB that did make it across. This also managed to copy a few more GB over, but not everything.
I am running the command from an ssh session on the NAS using putty on my PC, in as user "admin" which should have all rights over these folders. There is a bunch of errors in the command window like this: rsync: failed to set times on "/shares/usb1-1share1/movies/classics/fulldvd/First Blood DVD/.VTS_01_2.VOB.RxdjWZ": Operation not permitted (1)
I want to restart another session and get the files it missed, but I want to find out what I am doing wrong first. Should I be doing this as root user? am I missing some switches or just plain doing it all wrong?
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Feb 11, 2010
I am trying to ftp a whole directory tree using vsftpd as ftp server in fedora11
Code:
I am getting error while transfering a directory tree ...
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Sep 30, 2010
This little fragment does the opposite of what I want and I am trying to figure out how to reverse it. I want to strip off the directory and echo just the filenames. I cannot predict how many levels deep the directory tree is.
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Aug 31, 2010
how do I find a phrase/word recursively in a file tree in Linux?I tried find . -name ./* | grep my_phraseand I tried grep -r "register_long_arrays" *
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Jan 8, 2011
Can you still use a 'distro' that has been knocked off the update tree with security intact, i.e., what are the risks. I ask because I am quite happy with fed 12 but there is a sound problem with my hardware on fed 14. My idea of extended support is 10 years, nieve I know but a nice thought.
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May 18, 2010
I want to record an internet radio station starting at 2:00am tomorrow morning. The specific program on the radio station lasts until 6:00am. The command I need to run to record the station is: Code:mplayer http://wjcu.jcu.edu:8001/listen.pls -ao pcm:file=indie_heat_of_the_night.wav -vc dummy -vo nullI'd use cron, but 1. I'm not sure how to and 2. it seems unnecessarily complicated for something that I only want to run once. If cron is the only/easiest solution, I guess I'll just have to resort to that, but I'd rather not.
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Sep 19, 2010
I'm connected to a Linux box through SSH on which I don't have administrative privileges. The command I wish to use is called tree, but it isn't installed. Is there any way I can load the tree program into my home directory and run it without the need to install it system wide?
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Jun 8, 2010
How do I give permission to a logged in user to stop/start a specific service without entering a root/sudo password? So they can do a simple "service SomeService stop|start" It is for a headless Ubuntu server.
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Jul 24, 2010
I need to search a bunch of files in a specific folder for a specific number and add all the numbers together to a total sum. I use Rsync everyday, everytime I run rsync i get a logfile (rsync output) witch contains the textstring "Total bytes sent: xxxxxx".
The "xxxxx" can vary in lenght. I need to extract the "xxxxxx" from each file and add the numbers together to a total size over a week or a month. Is this possible? And I wish to only use bash. One way of doing stuff at a time my friends .
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Jun 9, 2010
my system I want user1 and only user1 to be able to mount and unmount a specific partition, this partition contains backups and is usually mounted read only, needs to be temporarily mounted read/write by user1 while doing the backup.user1 is an unprivileged user. I've read that the user option will let any user mount the file-system (and only that user can then subsequently unmount it) and that the users option allows any user to mount or unmount the file-system.I also found this in mount's man pageQuote:The owner option is similar to the user option, with the restriction that the user must be the owner of the special file. This may be useful e.g. for /dev/fd if a login script makes the console user owner of this device. The group option is similar, with the restriction that the user must be member of the group of the special file.So it looks like I'd need a login script for that user to make the user owner of the device file (/dev/voiceserv/backup in this case)
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Oct 1, 2009
I'm trying to configure our mail server to block email from a specific sender reaching a specific recipient. In other words, if one of our employees is getting harassed by a 'stalker', how would one go about blocking, at the MTA (Sendmail) level, a specific sender email address from reaching a particular users inbox? We do not want to capture the email - simply block it before it consumes server resources.The Sendmail server (MTA) is a front end to our Exchange server so no user accounts exist on the Linux server. We simply use it as a SPAM and Virus scanner then forward clean email to the Exchange server.
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Jul 19, 2010
I want to replace specific character in a file after every specific line. example as follows.
O 000000000000000000
A 111111111111111111
C 222222222222222222
[code]...
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Jul 1, 2009
I configure squid to work with squidGuard , and all thing work properly , but there is problemfirst look to this squidGuard.confdhhome /usr/local/squidGuard/dblogdir /usr/local/squidGuard/log
src blacklist {
ip 10.0.0.5
}
[code]...
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Mar 22, 2011
I'm wondering if there exists a program get can build a tree from the ftp?
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Nov 30, 2015
I have a home storage of many drives which are seldom accessed, and extremely seldom written to. So, I made several RAID1 arrays with "write-mostly" drives in each one, so that all the drives spin down after a while, and if they are accessed, only one drive in each array has to spin up. This way, I hope to minimize the risk of losing anything due to mechanical shock or wear.
But it was not so easy. First, the write-mostly drives did spin up on every read request due to a bug in the kernel, so I managed to get the fix accepted into the newer kernels (which is my largest contribution to the Linux development so far. See [URL] .....) Now, if I read directly from the array, it works as expected (only the first drive spins up); but if I create a filesystem there (ext4) and read from it, the second drive still spins up anyway. (Does ext4 write something when it reads a file?.. I have it mounted with relatime, so AFAIK it shouldn't...)
Well, I thought, I'll just mount the filesystems read-only and remount them if I need to modify the data there, which is not very often, to say the least. Also, this way the drives don't have to spin up every system shutdown to unmount the filesystems; during a power outage, it used to take a lot of time for them to spin up one by one just to unmount, while my UPS had to survive long enough for them to finish. That's one more problem solved.
But I decided to improve even further. Sometimes I just want to see the contents of those arrays without even accessing some files (for example, when I accidentally click the wrong network drive button in Windows, or when I just want to see if I have something there or not). If I read the directory trees during startup and keep them cached, then those drives won't even have to spin up at those moments! The question is, is there a way to do it? I remember Linus boasting about our kernel being the best at caching the filesystem trees, and I know there is vmtouch [URL] .... which allows us to keep some files cached, but what about the directory tree itself?.. If I simply "find" all the files there, it seems to work, but they get evicted from cache sooner or later...
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Jan 27, 2010
I'm looking for some software that could help me make a family/work tree. The only problem is that I would like to add other types of connections other than the blood related ones, such as worked with, studied with, supervised someone else etc. And perhaps have the possibility of adding some data about each person and export in a format that can be used by other programs as well.
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Dec 19, 2010
In solaris we have ndd , tip and ptree command but I couldnt find any similar command in Linux. does anyone knows the equivalent for ndd ptree tip then please let me know.
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Jan 9, 2010
I think I've finally settled on Slackware, but I kept missing Arch or FreeBSD for some reason. Last night I realized it's the abs/ports systems they have. I love the freedom to rebuild any package from source so I can configure build options and not worry about how packages from third party sites were compiled (missing features, patent restrictions, etc.).
SlackBuilds.org is awesome, and according to that site Pat uses SlackBuilds to build the official packages. Wouldn't it be great if there was a /var/slackbuilds/ directory with subdirectories for each software set for the officially supported software and then a subdirectory for each category on SlackBuilds.org?I would really like to see this in Slackware some time. It would help organize all the available software in the official sets and SlackBuilds.org and make it easy to compile anything. Other software would, as usual, be downloaded from third-party sources and simply installed that way.
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Jan 3, 2011
I have a straingh problem with kill. I start a skript run.sh. With Ubuntu i can kill run.sh and the whole pstree is killed. with centos it does not work?
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why does centos do not kill the wohle tree? is there someting with the bash? ubuntu use 4x and centos 3.2
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Jun 10, 2010
I've got a directory structure full of files. I want to convert them all into some other format, but I don't know how to keep the directory structure, is there a way so I can "set" which command to use on files instead of `cp`?
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Dec 29, 2010
I initially set up my filesystem on a single disk, normal, plain vanilla, with a partition for /var.Just as an example let's say I have in this file system a path /var/lib/temp.Under /temp I want 4 directories /one, /two, /three, and /four so I get /var/lib/temp/one and /var/lib/temp/two, etc. So I created them.Now I want to separate the directories /one, /two, /three and /four such that each is on its own partition. I create the four partitions and then copy into the appropriate partition /one, /two, /three, and /four. Of course all the stuff inside of those directories are moved over as well.
In fstab I locate a mount point called /var/lib/temp, located just below the /var mount point, and it is on the line with the partition that holds /one.Save fstab, mount -a and it works. Back to fstab, add a second line below the first with same mount point but this time with the partition for /two.Mount -a and /one fails and /two is up. So yes, I can't just put the fstab file together the way I did. I see that clear as day. Last line wins. What I don't see is how to make it right.
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Jan 3, 2011
Is there a safe way to cleanup the /lib file tree? Mines gotten too large for the filesystem it's on (/), and I've already shot myself in the foot a few times trying to delete things.
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