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  • What do the & and | operators do in a batch file?

    - by Sam
    I'm debugging a batch file left behind by an old employee and I've come across the line: @nmake -f makefile /E 2>&1 | tee %LOGFILEPATH% What does this do? I know what @nmake -f makefile /E does and I know what tee %LOGFILEPATH% does, but I can't find anything on what the 2>&1 | means. Thanks

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  • Copy files in Linux, avoid the copy if files do exist in destination

    - by user10826
    Hi, I need to copy a /home/user folder from one hardisk to another one. It has 100000 files and around 10G size. I use cp -r /origin /destination sometines I get some errors due to broken links, permissions and so on. So I fix the error, and need to start again the copy. I wonder how could I tell the command "cp", once it tries to copy again, not to copy files again if they exist in the destination folder. Thanks

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  • Is it possible to copy a set of files, but automatically skip if file already exists?

    - by awe
    I know that the copy command has an option to automatically replace a file if it already exists, but I want to know if it is a way to copy the files only if they not already exist (/Y). I do not know the actual file names in the batch code, as I copy from the source using wildcards in the copy command: copy *.zip c:\destination The reason I want this instead of automatic overwrite is that the files are large, and to skip existing would save a lot of execution time.

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  • Is it possible to copy a set of files, but automatically skip if file already exists?

    - by awe
    I know that the copy command has an option to automatically replace a file if it already exists, but I want to know if it is a way to copy the files only if they not already exist (/Y). I do not know the actual file names in the batch code, as I copy from the source using wildcards in the copy command: copy *.zip c:\destination The reason I want this instead of automatic overwrite is that the files are large, and to skip existing would save a lot of execution time.

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  • Binary files printing and desired precision

    - by yCalleecharan
    Hi, I'm printing a variable say z1 which is a 1-D array containing floating point numbers to a text file so that I can import into Matlab or GNUPlot for plotting. I've heard that binary files (.dat) are smaller than .txt files. The definition that I currently use for printing to a .txt file is: void create_out_file(const char *file_name, const long double *z1, size_t z_size){ FILE *out; size_t i; if((out = _fsopen(file_name, "w+", _SH_DENYWR)) == NULL){ fprintf(stderr, "***> Open error on output file %s", file_name); exit(-1); } for(i = 0; i < z_size; i++) fprintf(out, "%.16Le\n", z1[i]); fclose(out); } I have three questions: Are binary files really more compact than text files?; If yes, I would like to know how to modify the above code so that I can print the values of the array z1 to a binary file. I've read that fprintf has to be replaced with fwrite. My output file say dodo.dat should contain the values of array z1 with one floating number per line. I have %.16Le up in my code but I think that %.15Le is right as I have 15 precision digits with long double. I have put a dot (.) in the width position as I believe that this allows expansion to an arbitrary field to hold the desired number. Am I right? As an example with %.16Le, I can have an output like 1.0047914240730432e-002 which gives me 16 precision digits and the width of the field has the right width to display the number correctly. Is placing a dot (.) in the width position instead of a width value a good practice? Thanks a lot...

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  • How can I quickly parse large (>10GB) files?

    - by Andrew
    Hi - I have to process text files 10-20GB in size of the format: field1 field2 field3 field4 field5 I would like to parse the data from each line of field2 into one of several files; the file this gets pushed into is determined line-by-line by the value in field4. There are 25 different possible values in field2 and hence 25 different files the data can get parsed into. I have tried using Perl (slow) and awk (faster but still slow) - does anyone have any suggestions or pointers toward alternative approaches? FYI here is the awk code I was trying to use; note I had to revert to going through the large file 25 times because I wasn't able to keep 25 files open at once in awk: chromosomes=(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25) for chr in ${chromosomes[@]} do awk < my_in_file_here -v pat="$chr" '{if ($4 == pat) for (i = $2; i <= $2+52; i++) print i}' >> my_out_file_"$chr".query done

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  • How do I use Group Policy on a domain to delete Temporary Internet Files?

    - by Muhammad Ali
    I have a domain controller running on Windows 2008 Server R2 and users login to application servers on which Windows 2003 Server SP2 is installed. I have applied a Group Policy to clean temporary internet files on exit i.e to delete all temporary internet files when users close the browser. But the group policy doesn't seem to work as user profile size keeps on increasing and the major space is occupied by temporary internet files therefore increasing the disk usage. How can i enforce automatic deletion of temporary internet files?

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  • using a "temporary files" folder in python

    - by zubin71
    I recently wrote a script which queries PyPI and downloads a package; however, the package gets downloaded to a user defined folder. I`d like to modify the script in such a way that my downloaded files go into a temporary folder, if the folder is not specified. The temporary-files folder in *nix machines is "/tmp" ; would there be any Python method I could use to find out the temporary-files folder in a particular machine? If not, could someone suggest an alternative to this problem?

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  • What is the fastest way to create a checksum for large files in C#

    - by crono
    Hi, I have to sync large files across some machines. The files can be up to 6GB in size. The sync will be done manually every few weeks. I cant take the filename into consideration because they can change anytime. My plan is to create checksums on the destination PC and on the source PC and than copy all files with a checksum, which are not already in the destination, to the destination. My first attempt was something like this: using System.IO; using System.Security.Cryptography; private static string GetChecksum(string file) { using (FileStream stream = File.OpenRead(file)) { SHA256Managed sha = new SHA256Managed(); byte[] checksum = sha.ComputeHash(stream); return BitConverter.ToString(checksum).Replace("-", String.Empty); } } The Problem was the runtime: - with SHA256 with a 1,6 GB File - 20 minutes - with MD5 with a 1,6 GB File - 6.15 minutes Is there a better - faster - way to get the checksum (maybe with a better hash function)?

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  • How do I make a shortcut for a Perl program under Windows using a DOS batch file?

    - by Micah
    I'm trying to "hide" some of my perl program from the end user to make things easier on them. I'm doing what I can to keep them out of the command prompt. The program itself has a GUI designed in Perl/Tk, so they don't have to worry about the command prompt. Could I write out a quick batch file that goes along the lines of: START perl 'C:\[some path here]\myscript.pl' with START to start a program, the perl interpretor as my program, and the path/name of my perl script as the parameter? Would I have to specify where to find perl or would Windows just know because perl is in the computer's PATH variable? Thanks for the help!

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  • Making a shortcut for a Perl program under Windows using a DOS batch file.

    - by Micah
    I'm trying to "hide" some of my perl program from the end user to make things easier on them. I'm doing what I can to keep them out of the command prompt. The program itself has a GUI designed in Perl/Tk, so they don't have to worry about the command prompt. Could I write out a quick batch file that goes along the lines of: START perl 'C:\[some path here]\myscript.pl' with START to start a program, the perl interpretor as my program, and the path/name of my perl script as the parameter? Would I have to specify where to find perl or would Windows just know because perl is in the computer's PATH variable? Thanks for the help!

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  • GNU make copy files to distro directory

    - by TheRoadrunner
    I keep my source html (and images etc.) in separate directories for source control. Part of making the distro is to have make copy files to output folder and set the attributes. Today my makefile shows (extract): %.html: /usr/bin/install -c -p -m 644 $< $@ www: $(HTMLDST)/firmware.html $(HTMLDST)/firmware_status.html $(HTMLDST)/index.html $(HTMLDST)/firmware.html: $(HTMLSRC)/firmware.html $(HTMLDST)/firmware_status.html: $(HTMLSRC)/firmware_status.html $(HTMLDST)/index.html: $(HTMLSRC)/index.html This is shown with only three html files, but in reality, there are lots. I would like to just list the filenames (without paths) and have make do the comparison between source and destination and copy the files that have been updated. Thank you in advance Søren

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  • Batch vs SQL statement

    - by AspOnMyNet
    a) A SQL statement is a single SQL command (for example, SELECT * FROM table1 or SET NOCOUNT ON). A batch on the other hand, is a number of SQL statements sent to the server for execution as a whole unit. The statements in the batch are compiled into a single execution plan. Batches are separated by the GO command So the only difference between SQL statement and a Batch is that each SQL statement is sent to server as a separate unit and thus is compiled separately from other SQL statements, while SQL statements in a Batch are compiled together? b) I assume one of major differences between a stored procedure and a Batch is that stored procedures are precompiled while Batches aren’t? thanx

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  • Trying to cat files - unrecognized wildcard

    - by Barb
    Hello, I am trying to create a file that contains all of the code of an app. I have created a file called catlist.txt so that the files are added in the order I need them. A snippet of my catlist.txt: app/controllers/application_controller.rb app/views/layouts/* app/models/account.rb app/controllers/accounts_controller.rb app/views/accounts/* When I run the command the files that are explicitly listed get added but the wildcard files do not. cat catlist.txt|xargs cat > fullcode I get cat: app/views/layouts/*: No such file or directory cat: app/views/accounts/*: No such file or directory Can someone help me with this. If there is an easier method I am open to all suggestions. Barb

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  • emacs exporting org file as PDF in batch mode

    - by Sid H
    I'm trying to export a bunch of org mode files to PDF using emacs in batch mode. So far, only export to html seems to work. When I export to html I see the following - U:\tmpd:\programs\emacs-23.1\bin\emacs.exe -batch --visit=Changelog.org --funcall org-export-as-html-batch OVERVIEW Exporting... Exporting... Saving file u:/tmp/Changelog.html... Wrote u:/tmp/Changelog.html HTML export done, pushed to kill ring and clipboard However, there is no function like org-export-as-pdf-batch and so I tried the following. U:\tmpd:\programs\emacs-23.1\bin\emacs.exe -batch --visit=Changelog.org -eval "(org-export-as-pdf \"Changelog.pdf\")" OVERVIEW Exporting to PDF... Exporting to LaTeX... Wrong type argument: number-or-marker-p, "Changelog.pdf" Any ideas on how to export to PDF? My org-mode version is 6.35i with on Emacs 23.1. I'm on WinXP.

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