Regarding Shell Script
I have the below line in the unix shell script. I want to exclude test.jar in WEB-INF/lib being added to the CLASSPATH. How can i do it? for file in WEB-INF/lib/*jar ; do CLASSPATH=$CLASSPATH:$PWD/$file done ...
unix
Linux directories
I am writing installation script for my program, which is supposed to run on Linux/Unix OS. What is the default directory for the following files: Executable files (programs). Program should be executed by typing its name from the command line. Shared libraries. Third-party shared libraries (the program is not open source, so I need to...
Custom installation directories
Let's say I am writing installation script for the program which contains executable file and shared library. By default, this script places executable to /usr/local/bin, and shared library to /usr/local/lib. In this case my program may be executed by any user by typing its name in the command line. Suppose that user selects custom inst...
display records which exist in file2 but not in file1
log file1 contains records of customers(name,id,date) who visited yesterday log file2 contains records of customers(name,id,date) who visited today How would you display customers who visited yesterday but not today? Constraint is: Don't use auxiliary data structure because file contains millions of records. [So, no hashes] Is there a...
Unix file naming convention for effective tab completion?
I feel like I often name files in such a way that my computer constantly beeps while I program because the tab completion is ambiguous. Before doing a lot of Unix programming, I tended to name related files with the same prefix to indicate their relation. Now I must re-think my approach to folder and file structures and names to program ...
Merge unversioned directory structure into SVN repository
I committed a 3rd party project into my own svn repository. Now, I got a new version of that project and I'd like to substitute it in my repository. The project is quite big (1.2GB) and the new version has new files/directories and also deleted files/directories. The trivial solution is svn rm project mv /path/to/new/project . svn add...
How to build this project?
Hi, I've been a visual studio developer for long and just trying to understand how things are in linux/unix worl. I found an open source project (Gcomandos) in source forge and tried to build it. when I download the source, I get these files: 16/02/2007 05:16 PM 25,987 aclocal.m4 16/02/2007 05:17 PM 127,445 config...
Saving CFPropertyLists To Users Folder
I'm trying to save a CFPropertyList to a location in the user's home folder. Using the code below I'm getting errorCode = -10 (unknown error). CFURLRef fileURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, CFSTR("~/testfile.txt"), kCFURLPOSIXPathStyle, false ); SInt32 errorCode; Boolean status = CFURLWriteDataAndPropertiesTo...
ACPI tables information
Can anyone please explain me about what information is present in the ACPI tables? I need urgent help for this. Thanks in Advance. ...
Shell script to process files
I need to write a Shell Script to process a huge folder of nearly 20 levels.I have to process each and every file and check which files contain lines like select insert update When I mean line it should take the line till I find a semicolon in that file. I should get a result like this C:/test.java select * from dual C:/test.java ...
Linux/Unix environment variables
Where Linux/Unix environment variables are kept? How can I add my own environment variable and make it persistent, not only within currently running script? ...
awk output to a file
I need help in moving the contents printed by awk to a text file. THis is a continuation of previous quesion I have to move all the contents into the same file so it is appending. To be specific nawk -v file="$FILE" 'BEGIN{RS=";"} /select/{ gsub(/.*select/,"select");gsub(/\n+/,"");print file,$0;} /update/{ gsub(/.*update/,"update")...
Why is sys+user > real in "time command"?
I have a program that uses pthread library to do the matrix multiplication of 500x500 matrix. Each thread calculates 50 rows of the matrix. When I run tiem command:- shadyabhi@shadyabhi-desktop:~$ time ./a.out real 0m0.383s user 0m0.810s sys 0m0.000s shadyabhi@shadyabhi-desktop:~$ How come sys+user is greater than real tim...
Calling a standard library function in signal handler.
Why is calling a standard library function inside a signal handler discouraged? ...
Vim syntax highlighting: make region only match on one line
Hello I have defined a custom file type with these lines: syn region SubSubtitle start=+=+ end=+=+ highlight SubSubtitle ctermbg=black ctermfg=DarkGrey syn region Subtitle start=+==+ end=+==+ highlight Subtitle ctermbg=black ctermfg=DarkMagenta syn region Title start=+===+ end=+===+ highlight Title ctermbg=black ctermfg=yellow syn r...
How do I determine if a terminal is color-capable?
I would like to change a program to automatically detect whether a terminal is color-capable or not, so when I run said program from within a non-color capable terminal (say M-x shell in (X)Emacs), color is automatically turned off. I don't want to hardcode the program to detect TERM={emacs,dumb}. I am thinking that termcap/terminfo sh...
[UNIX] Sort lines of massive file by number of words on line (ideally in parallel)
I am working on a community detection algorithm for analyzing social network data from Facebook. The first task, detecting all cliques in the graph, can be done efficiently in parallel, and leaves me with an output like this: 17118 17136 17392 17064 17093 17376 17118 17136 17356 17318 12345 17118 17136 17356 17283 17007 17059 17116 E...
i want to copy the output of unix and sqlplus into a file .
I am using Solaris. I have to log into sql plus and run some queries, which give a huge result set. I want to copy all that into a file. Is there any command for it in unix or sqlplus ? ...
Whats the difference between running a shell script as ./script.sh and sh script.sh
I have a script that looks like this #!/bin/bash function something() { echo "hello world!!" } something | tee logfile I have set the execute permission on this file and when I try running the file like this $./script.sh it runs perfectly fine, but when I run it on the command line like this $sh script.sh It throws up an ...
What are all the differences between pipes and message queues?
What are all the differences between pipes and message queues? Please explain both from vxworks & unix perspectives. I think pipes are unidirectional but message queues aren't. But don't pipes internally use message queues, then how come pipes are unidirectional but message queues are not? What are the other differences you can think...