Tag: linux

How cut characters from string and put it at the end- In shell

I want to be able to do the following: And get output like: I know the command sed is able to do this but I need some guidance. Thanks! Answer In sed you can do: Which outputs 3002_3322 3.2.1.log HELLO. Explanation The first word is captured by ([^[:blank:]]*) The () means I want to capture this group to use …

Pass array to C# from C++ via mono

.net c++ linux mono

I need to pass an array from C++ to C# using mono. But I can’t get mono_array_set() to compile. So how can I pass an array from C++ to C#? I’ve tried mono_runtime_invoke() which compiles but gives a runtime error. Answer This works:

How can I fix the following sed command?

linux regex replace sed unix

I am trying to append _out to anything that matches the regex shown in the follwing sed command. The _out should be before the [ (]. The command returns the lines correctly as I expect. Now the problem comes when I try the following command where I define regions to use in the replacement. So for example if I…

Using makefile, LD_PRELOAD to executable file

c++ linux makefile shell

I have two files, “abc.c” and “run” and I want to make a executable binary file which perform below two intstructions I tried to use makefile in linux, but failed. Can I use makefile to make executable binary file ? Answer Ideally, makefile should be used for compilation. For automatin…

Replace characters in specific columns only (CSV)

awk csv linux sed

I have data like this: It has dot . as decimal separator but I need to use , instead. Desired data: I tried using Sed. With sed -i ‘s/./,/g’ myfile.csv I could replace all dots with commas but would destroy dates on the fourth column. How can I change dots to commas in elsewhere but leave the four…

Cannot Get Laravel Welcome Page to Show

digital-ocean frameworks laravel linux php

My server is on DigitalOcean cloud. I am using Ubuntu with Apache web server. My home computer is running Windows 7. I am using putty for terminal. Followed all of the directions on https://laracasts.com/series/laravel-5-fundamentals/episodes/1. Made it up to 8:40, where it directs you to run php -S localhost…

Golang UDP Server only recieving locally sent packets

go linux network-programming udp

I’ve written a UDP Server in Go(listens on port 666), and it seems to be only receiving packets that were sent locally. To confirm traffic, I have been using: My(abbreviated) server code: If, from the machine the server is running on, I use: then the server receives that packet, and prints the message(a…

Linux C++ Dynamic Libs and static initialization order

c++ dynamic initialization linux shared-libraries

Forgive me on the long post. Its a complicate problem I wanted a complete description. On Linux Fedora 21 (g++ 4.9.2) and like. I’m working on a C++ database wrapper library using a base class of “database” and inherited classes of Oracle and Sybase. Beyond that, I wanted some of the program…

Counting all .class files

bash count linux shell

I want to count all .class file in my project directory. I am working on ubuntu. I can list all the class file like this – It lists a lot of .class files. But I want to know the count of these .class files. Is there any way to do this in linux. Thanks. Answer Use wc -l. wc stands

command blkid don’t show my partitions UUID

bash blkid linux ubuntu unix

I’m using Ubuntu. command blkid or blk /dev/sda2 in LPIC-1 module 104.3 (mounting and unmounting). but these commands don’t show me the expected results. blkid is installed and also I can see man blkid !!! Could you guide me to fix this? Answer Run sudo blkid After that you will be able to get the…