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Tag: linux

Jar doesn’t execute on linux

I exported an executable Jar file from Eclipse. On Windows when I double-click the file, it executes properly. When I run it from command line with java -jar MyJar.jar it also works. But when I upload that file on my linux VPS and try to run it there, I just get the error Error: Could not find or load main

How to append a column for the result set in shell script

I need a script for the below scenario. I am very new to shell script. the above query results with following result Now I need to get result as follows: 1st column, 3rd column ,4th column of above result set and new column with default values Here the last column values is always known values i.e for file1 D…

I want to write a function that retrieves a webpage

I’m trying to write a function that returns the html code of a specified URL here’s my code so far: only the first success string is printed: success here’s my writememorycallback: the same code when embedded into the body of the main function works just fine. Answer If only the first string…

Raw Sockets in C

1. The linux manual page says about this code. In socket option, if IP_HDRINCL is set, I can make IP header. Am I right? If it’s right, above socket also let me make TCP header, too? Then, if IP_HDRINCL is not set, what means above socket? 2. what means above code comparing to number 1 question’s …

Select in loop – work all the time – linux

I got next question about select: How to make select in loop ? I try to do like that: But there all the time show: ,, no communicate”. Is it the correct way to create select which work all the time? I am not sure so I prefer to ask. I try to find information in books but with no