CS111 Lab Linux etc.

Instructor: Michael Gordon

Linux

We will be using the Linux OS, which

may be different from the operating

systems you have used before

(Windows, Mac OS).

There is no GUI or mouse-interface.

Commands are typed at the prompt.

Linux commands

Create a directory (folder): mkdir

[prompt] mkdir mydir

Change current directory: cd

[prompt] cd mydir

[prompt mydir]

Go up one directory: cd .. (note space)

[prompt mydir] cd ..

[prompt]

Commands, continued

Remove a directory (folder): rmdir

[prompt] rmdir mydir

List files/sub-directories: ls (letter ‘l’)

[prompt] ls

List with details: ls -l

[prompt mydir] ls –l

Commands, continued

Copy a file: cp

[prompt] cp origfile newfile

Rename a file: mv

[prompt] mv origfile newfile

Remove a file: rm

[prompt mydir] rm origfile

Pico

Pico is a text editor for Unix. In this lab we

will use it to write our C++ code.

To open or create a file in pico:

[prompt] pico filename.cpp

To save: Control+o (letter ‘o’) prompts you

to overwrite. ‘Enter’ for ‘Yes’. Or change

the file name.

To exit pico: Control+x

In Pico

In Pico we will write our C++ code.

Note: You must move your cursor with the

arrows keys, not the mouse.

To ‘cut’ a line of code, use Control+k

To ‘paste’ use Control+u

Compiling

Once you’ve written a C++ program, you

need to compile it (translate it into

machine code) before running it.

We use a compiler called g++.

[prompt] g++ file.cpp

An executable file is automatically

created (or overwritten) with the name

a.out.

Executing

To run the executable file, type:

[prompt] ./a.out

To give a name to your .out file:

[prompt] g++ -o name.out file.cpp

To run:

[prompt] ./name.out