Which of these calls is faster on average? I’ve heard that mmap is faster for smaller allocations but I haven’t heard a comparison of either. Any information on performance for these would be nice. Answer You should tag this with a particular implementation (like linux) since the answer surely var…
Read/Write LabView TDMS files in python under linux
Does anyone know of a way to read and write the National Instruments binary file type (TDMS) in python under linux? I know that NI has a C DLL available, but I don’t know how to access that through python, or if I even can do so under linux. Answer It looks like TDMS isn’t directly supported under…
How to only get file name with Linux ‘find’?
I’m using find to all files in directory, so I get a list of paths. However, I need only file names. i.e. I get ./dir1/dir2/file.txt and I want to get file.txt Answer In GNU find you can use -printf parameter for that, e.g.:
dos2unix command
I have this script I want to remove “^M” charcaters from many files which are in more subdirectories. I got this: Is there somethig i’m missing? Thanks in advance. Answer I guess you don’t need a for loop. Here is a quick panorama of solutions for files with extension “.ext”…
Bash: How to tokenize a string variable?
If I have a string variable who’s value is “john is 17 years old” how do I tokenize this using spaces as the delimeter? Would I use awk? Answer Use the shell’s automatic tokenization of unquoted variables: If you want to change the delimiter you can set the $IFS variable, which stands …
How do I execute javascript programs from the Linux shell?
I would like to execute my javascript programs with the Rhino shell without making the first line #!/bin/sh. ‘#’ isn’t a comment character in javascript. I also don’t want to have to have a .js extension. Is this possible? I remember reading something a long while about a method of mak…
Apache LOG: child pid xxxx exit signal Segmentation fault (11)
Apache + PHP + Mysql + Linux [notice] child pid 23145 exit signal Segmentation fault (11), possible coredump in /tmp But nothing found under /tmp How can i find the error? Answer Endless loop of the function in PHP code caused this error.
How can I know if I am running in a 64bits or a 32bits linux from within a perl script?
I don’t want to directly access the shell (for example to use uname). I am looking for a fast-forward way to detect the architecture (only if it is 32 or 64 bits), once I know I am on linux. Answer There are 3 separate questions you could be asking: Note for all that there’s not a single magic …
how to print this in .xsl file?
I have .xsl file, in this file I want to print “<” how I can print ? Thanks in advance. Answer
How to send integer with pipe between two processes!
I am trying to send an integer with pipe in a POSIX system but write() function is working for sending string or character data. Is there any way to send integer with a pipe? Regards Answer The safe way is to use snprintf and strtol. But if you know both processes were created using the same version of compil…