I am playing with a simple program (source code below). And my computer configuration: Linux mymachine 3.13.0-49-generic #83-Ubuntu SMP Fri Apr 10 20:11:33 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04.3) I intend to trigger the SIGFPE in this program by calling the ex…
IPTables drop UDP packets with IP Header Identification
We are currently receiving a 30Mbps Spoofed UDP flood against one of our applications that is causing high CPU usage, we have a dedicated firewall running a basic version of linux with IPTables. Looking at the traffic logs, all of the spoofed UDP traffic has a header identification number of 31336. Is it poss…
command not found in zsh when it is there
I just installed the android SDK and was trying to run the emulator when this happened: emulator seems to be in one of the $PATH directories, but zsh still says that it wasn’t found. What could be the cause? Answer Solved it. The problem was that emulator was a 32-bit ELF binary, and I didn’t have…
why sometimes we need to mount those files under root? [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. This question does not appear to be about a specific programming problem, a software algorithm, or software tools primarily used by programmers. If you believe the question would be on-topic on another Stack …
How to write shell script,to automate file conversion?
I have 30 files(ascii),which I want convert to binary.Linux command line(FORTRAN 77 CODE) that has been compiled Relevant part of the code Then code asks for input and output file names How to automate this?I have tried like this Or But I do not have a clue for next step.Text files are Output files Answer Try…
Linux where does zip place the newly created zip file? [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. This question does not appear to be about a specific programming problem, a software algorithm, or software tools primarily used by programmers. If you believe the question would be on-topic on another Stack …
Finding a string between two lines in a file using linux commands
I have a file, file.txt, like this: What I want to get is the line between the last set of ‘start cal’ and ‘end cal’. I am using tac and grep to do it. But in vain. Any help please? Below is my code: What am I doing wrong? For the example above, I need the command to return ‘erro…
Linux awk command with pipe
Can anyone tell me what the below linux command does: I know tail -5 test.log | grep ‘Start Calculate’ looks for the 5 last lines containing ‘Start Calculate’ in test.log. But then I don’t get what awk does? Answer tail -5 test.log take the 5 last lines of the test.log file then …
Insert space between numbers after matching specific pattern [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 6 years ago. Improve this question I have the following temperature data that needs to be manipulated. Though…
java call perl which read and write data
I have two files int the directory ‘/tmp’: test.txt ,test.pl the content of test.txt is : the content of the test.pl is: Then in java class I write : Then the content of the newtest.txt generated from the perl is : Here is the problem ,There is a difference but when I run ‘perl test.pl’…