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Programming

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  • 1. Programming on Linux Navya Linux Lectures Chintalagiri Shashank
  • 2. Programming on Linux ● The Linux Command Line ● Text Editors ● Compiling ● IDEs chintal@iitk.ac.in Navya Linux Lectures
  • 3. The Linux Command Line – Some basic commands ● ls <path> – list all files in <path> – only 'ls' displays all files in the current directory ➢ cd <path> ➢ changes the directory to <path> ➢ if no <path> - goes into your home directory ➢ if <path> = .. - goes one level up ➢ pwd ➢ prints out the current path ➢ touch <filename> ➢ creates a blank file named <filename> ➢ cp <original file> <destination> ➢ mv <original file> <destination> ➢ rm <filename> ➢ removes the file <filename> ➢ not undo-able. use with care. Navya Linux Lectures chintal@iitk.ac.in
  • 4. Text Editors ● vim – (command line) ● nano – (command line) ● emacs – (command line, can be installed using apt / synaptic) ● gedit – (graphical) ● kate – (graphical, needs kdelibs, built in terminal, needs to be installed using apt / synaptic) chintal@iitk.ac.in Navya Linux Lectures
  • 5. Writing programs on linux ● Shebang – – – Some typical interpreters for shebang lines: – * #!/bin/bash — Execute using bash program in the /bin/ directory – * #!/bin/csh — Execute using csh, the C shell instead – * #!/bin/ksh — Execute using the Korn shell – * #!/bin/awk — Execute using awk program in the /bin/ directory – * #!/bin/sh — Execute using sh – * #!/usr/bin/perl — Execute using Perl – * #!/usr/bin/php — Execute using PHP – * #!/usr/bin/python — Execute using Python – * #!/usr/bin/env — Invocation of some other program using env program in /usr/bin directory chintal@iitk.ac.in Navya Linux Lectures
  • 6. Compiling / Running ● C / C++ (installed with build-essential) ● Writing programs – file extension should be .cpp or .cc for C++ for compatibility with older versions of gcc – gcc / g++ is slightly different from Turbo C/ TC ++ ● C++ header files do not have a '.h' at the end of the name ● to use cout, cin, etc. from iostream(.h), put in the line “using namespace std;” in the global scope. ● main is int main() instead of void main() ● Compiling programs – do this from the command line – gcc <filename.c> -o <output filename> – g++ <filename.cpp> -o <output filename> ● Running Programs – ./<output filename> Navya Linux Lectures chintal@iitk.ac.in
  • 7. Compiling / Running ● Sun Java – Install the java compiler using apt-get or add/remove programs. package name : sun-java5-bin – Compiling and running programs is the same as in Java for windows ● Python – run from a command line : ● python <filename> – if <filename> is blank, it takes you to the interpreter mode. ● Perl – run from a command line : ● perl <filename> – if <filename> is blank, it takes you to the interpreter mode. chintal@iitk.ac.in Navya Linux Lectures
  • 8. Compiling / Running ● Lisp (install gcl using apt/ synaptic) ● Compiling programs – do this from the command line – gcl <filename.lisp> -o <output filename> ● Running Programs – ./<output filename> ● HTML / PHP / CSS ● edit on any text editor ● graphical tool – Nvu (for HTML) ● Fortran – To install the GNU Fortran 77 compiler - g77, you need the g77 package. ● to compile – g77 <filename> -o <output filename> ● to run – ./<output filename> Navya Linux Lectures chintal@iitk.ac.in

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