Server :: Multiple File Pointers In A Single File?
Apr 20, 2011
I have files a, b, c and d. They're all relatively large and are served up by a static web server optimized for this purpose. I can get requests that look like this:
Each request is basically a request for a concatenation of the files in the order of the letters. The list of possible requests is finite, but large enough that disk space will run out very quickly and be very expensive if I create all possible files via concatenation.Is there a way to create a pointer file like abcd that is essentially a multi-file symlink that first points to a then to be then to c then to d? So if the contents of the files were as follows:
how to update a series of values from multiple grep commands outputs to be appended to a single row of a csv file? Work on a linux envir. The values from grep output will be numeric values.
Output sold look like:
Each of these values will be odtained from multiple grep commands piped with wc -l Is it possible to update a single row of a csv file if so pleas ehelp me with the command to be used to redirect the output into the csv file
I have a huge binary log file. There are lets say 4 id's that I want to find in a log file. I know that those 4 id's will be present in the log file and I also know in what order they will be present. I want to find 1st id from the log then 2nd id and then third id and so on..
Simple/inefficient solution is: Loop through the id's and then grep in the log file. Problem with this solution is for each id grep will search from the beginning of the file.
Better/efficient solution would be: Sine I know the order in which id's will be present in the log file. Loop through id's, grep 1st id and then move on to grep 2nd id and so on...this way I can grep all id's in one pass. Is this solution possible ?
I have 500000 + values to find in log files and I have to find efficient solution for it.
I am using Xfce as the desktop enviroment and Mozilla Firefox as the webrowser. Within the webrowser window, I do File>Save Page As. I save it, and the result is almost always foo.html and directory foo_files. But I think under KDE I could choose the format, one of them being something like "Single page" (only one file; the colecction of .png, etc is embedded into that file). And this is the format I want Xfce (or Firefox) to use when downloading to hdd.
I have question about the UNIX sockets. my goal is to connect multiple sockets from a single client to a single server and keep them open...I'm not sure if that is possible to create or not. Do you have any suggestion or an example of code?
Does anyone know of any software that will convert a few csv's into a single xml?I have a windows program that has been doing it up until now but the info is pulled from one of my linux servers and then sent back to it afterwards, im looking to script it all rather and keep everything on the linux box.
I'm planing to copy a productive mysql innodb file from one server to another, and the file size is around 300GB. As the file is keeping changing all the time, I have to shutdown mysql instance and copy the large data file to other server as quickly as possible.I should have to find a way to speed up file copying ... I'm wondering whether there's a way to copy file block by block.If the destination side block has same content, then bypass it.
Iam reading a file using C-sh script after manipulating the variables I need to dump into a new file. This in working fine but I couldn't retain the multiple spaces and tabs in a same line. For readability I want to print it back as I read. Now script treating multiple tabs as onl tab or space.
In my production setup, i have 3 servers using the same mount point. However, i see that the IOPS is low. Does this kind of architecture have any impact on IOPS. In case it is neutral, how can i tune my setup for better IOPS.
We have too many audio Paths, for each user have one. We would like to create a unique folder to Read in network.
The idea is Mapping all folders to the path /pub/Music in server, so all user can access all music online in the server.
Very Well. How we can do it?
And when pc1 and pc2 have the same subfolder, like Beatles, and in the subfolder have different folders ( PC1-Beatles/Revolver ) (PC2-Beatles/Habbey_Road) or The same folder (PC1-Beatles/The_Mistery_Magic_Tour) (PC3-Beatles/The_Mistery_Magic_Tour)...
I am new in client server programming and i have written code for single server to single client communicating one port(3490). but i have no idea how my single server will be communicate with different client on different port.how this will be happen ?
Any idea to understand the logic or send any good link or any piece of code in c , i searched on net but all help was mostly for java progamming.
I have configured a file server with samba and winbind in RHEL5.I am able to allot permission for the active directory groups to my Linux folder.No issues.But i want to set multiple groups of active directory to get ownership to a single directory. Say there are 3 groups a,b,c to have permissions to a folder of the Linux machine.
Our system uses email to send fairly time-sensitive status messages between programs running on various servers on a WAN. Each email message is sent to two addresses (different servers). The problem occurs when one of the destination mail servers is off the network. I think because it's trying to send one email to two addresses, sendmail attempts delivery to the first address, then to the second address (i.e., serially). When this happens, it hangs for two connect timeout (CONNECT_TO) periods trying to connect to the offline destination, then after the timeout, it then delivers to the other destination. I'm trying to figure out how to work around that connection delay so it doesn't delay delivery to the other destination.
I'm working with the network guys to enable the right ICMP messages that signal when a network is unavailable, but I would also like to try having sendmail split the emails into two envelopes, then use parallel, independent connections for delivery.
After days of reading through the docs (O'Rielly Sendmail book + sendmail docs) I think one way to do this is to use multiple mail queues, but I can't decipher exactly how to do that from the docs.
There might be other, more elegant ways to do the same thing, but again, trying to decipher the docs has my head swimming. (This is my first experience with sendmail.)
I currently am running 10.04.1 and have successfully setup my home web server to run a single website. My current settings are:
-I have registered the domain name annarrankings.com through godaddy -A record is - host = @ and points to = 18.104.22.168 -CName is - host = www and points to = @ -on my server I have the site running in /var/www
I've done some research and found that to run multiple websites I need to setup VirtualHost.
-So I created a folder /var/www/annarrankings.com and moved my site to that folder
-Edited Apache2.conf to add the following line
-I then went to /etc/apache2/sites-enabled and copied the default file to a new file called annarrankings.com. Here's the annarrankings.com file after I edited it
-I then created a link in /etc/apache2/sites-enabled to the annarrankings.com file in /etc/apache2/sites-available
-Next I editied /etc/hosts
-When i went to enable the site using a2ensite annarrankings.com I got the following
I figured this was ok since I had already created a symbolic link earlier (a result of trying to following multiple tutorials and ..... videos at once) so I reloaded apache2. I created an index.html file in /var/www/ just for testing purposes and when I load www.annarrankings.com I get the file located in /var/www/ instead of the website located in /var/www/annarrankings.com Do I need to change my A record or CName in godaddy or did I just do this completely wrong?
I usually use .htaccess to restrict access to directories. But what if I just wanted to secure a single php file? Is there some sort of code that would allow me to say ONLY THIS IP can access this PHP file?
I've seen a lot of documents which use a really beautiful font. This is an example:[url] I mean the font which is used for "Problems", 'The area of a regular...'. Well, I found out that it's somehow called TeX font and I tried to download it. Unfortunately, this is font is separated in many, many files (Italic, Bold, Standard, Italic Bold, Math symbols, other symbols ...). It's horrible, because I would just like to use that font in OpenOffice. I wouldn't like to still change the style by choosing another font. Is there a place where I can download the combined TTF file? So I would just have the bold, italic, math symbols and other symbols in one font without having to choose the different one to just change a style or to enter a copyright sign?
I need to temporarily store a file containing sensitive data in a public server, in a secure way. I think that encrypting the whole file would be much more secure than creating a passworded .zip encrypted file, because they could be subject of brute force attacks. Attacking a whole file of unknow format is harder, I think. I thought of something like the command:
Code: $ programidontknow --encrypt mysensitive.file --output-file mumblerumble.file then the program asks interactively for a password) $ ls mysensitive.file mumblerumble.file
So I get one file that may look like junk. I tried to search how to do it with GnuPG. But it seems that GnuPG needs much configuration I dont want to do. I simply want to type the password one time to get the file. It doesnt need to retain any configuration for what I want to do. In similar scenario, I would want to do this on a machine/account that is not mine.
I've spent ages trying to build this and had a good look around for a way to do it. I have a directory tree which contains a set of folders and files. Some of the folders contain more than one file but most contain only a single one. I'm trying to move all of the files which are on their own in directories one level below the root into the root. E.g:
Root is: /volume3 Single file in a sub folder: /volume3/20110103/20110103.log File should end up as: /volume3/20110103.log
I know how to flatten the entire structure fairly easily but its the conditional part which I can't figure out how to do.
My question is about DNS use of the $TTL directive. I realize the $TTL directive stands for TimeToLive, my question is why would you specify different TTLs in the zone file? I have a zone file with
$TTL 300 machine machine machine TTL 3600
I'm not sure why you just wouldn't specify the same TTL for all systems or at least not have all the 300's grouped together and all 3600s grouped together. The file I'm looking at has about 12 different groups of 300 and 3600 TTLs.