Sample project from the NetBeans tutorials set contains only one Swing form (empty JFrame), compiles and runs fine, but I can’t change layout of the form and add elements in it with the NetBeans GUI buider since it shows only empty placeholder with single “loading…” message. Any clues …
check if argument is a valid date in bash shell
I am writing a bash shell script in Linux, this program will accept a date (mm-dd-yyyy) as a parameter. I am wondering if there is a simply way to check if the date is valid? is there an operator and I can just use test to check? Answer You can check with date -d “datestring” So date -d “12/…
Switch maven version – mvn command does not get bound
I’m trying to switch maven from 2 to 3 (on Linux) using: Anyway mvn -v still gives version 2, so I always have to execute /path/to/maven3/bin/mvn to use maven. How can I rebind the mvn command to the appropriate maven path? Answer which mvn And then recreate symbolic link to point on new Maven version. …
Ask GDB to list all functions in a program
How can you list all functions in a program with GDB? Answer info functions prints the names and data types of all defined functions. See 16 Examining the Symbol Table.
Porting windows application to linux
I have an application which I need to port on Linux. I was thinking to use Free Pascal the problem is the application uses Windows API’s to perform tasks such as serial port communication etc… Is there a msdn for linux users or a book covering how linux works internaly if there are apis. I am very…
Any good tools to solve integer programs on linux? [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Questions asking us to recommend or find a tool, library or favorite off-site resource are off-topic for Stack Overflow as they tend to attract opinionated answers and spam. Instead, describe the problem and …
Emacs, Linux and international keyboard layouts
Is there an easy way to use Emacs key-bindings when you are using a not-English (Russian) keyboard layout? Whenever an international layout is on, all keystrokes are interpreted literally, M-ф instead of M-a. As a result I can’t use commands. It would also be nice if Linux could interpret non-prefixed a…
how to grep listening on port 80 that can also filter other port contain 80 such as 8080 8088 …?
I want to use bash to grep if any process is listening on port 80,but now I stumble upon other port number which annoys me. How can I filter this in grep? It also outputs other records such as 8080 8088 and so on. Answer I’m looking at the output of my netstat command, and see this: I take it
How to completely destroy a socket connection in C
I have made a chat client in linux using socket, and i wish to destroy the connection completely. Following is the relevant portions of the code: but the close(sock) doesnot seem to close the destroy the connection completely, because after going to ‘label’ the code is exiting showing the error me…
libaio.so.1: cannot open shared object file
I have a simple test program that when I run I get: I link it like this: My LD_LIBRARY_PATH contains this: /usr/lib looks like this: Output of ldd hello: I’m hoping that I’m missing something simple here. The oracle instantclient package appears to require libaio, but that seems to be installed al…