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Can’t compile C++ program on Ubuntu

I used OSX to program in C++, but I am new to C++ compiler on Linux. I have a program consisting two .cpp files and one .h file that are compiled and run successfully on my Mac, but get compiling errors on Ubuntu. I did install gcc and g++ compilers and build-essential, and also apt-get update and update, sea…

How to change kernel timer frequency?

I wanted to change kernel option on kernel timer frequency. So i found this, it is saying that i can change the configuration via /boot/config-‘uname -r’ (And i also found the post saying unless it builds a tickless kernel – CONFIG_NO_HZ=y i couldn’t change timer frequency but mine is …

Multiple instances of main method in C

I’ve got an issue with an assignment, but I’m not asking for help to do the assignment, just single problem. My code is like this: Here’s the problem: When I do the make command from the directory, I get the error What does this error mean? I only defined the main method one time in my own f…

Replace the string/line after separator on specific param

I have the following Perl one liner code , My target is to replace the line after “=” separator, and that defined in PARAM variable But actually its replace all the line include the PARAM itself The expected results should be Please advice what need to fix in my Perl one liner code? other example that still n…