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Introduction
1. Introduction to the UNIX Operating System
- 1.1. What is UNIX?
- 1.2. Types of Unix
- 1.3. The UNIX operating system
- 1.4. Files and processes
- 1.5. The Directory Structure
- 1.6. Starting an UNIX terminal
2. Tutorial One
- 2.1. Listing files and directories
- 2.2. Making Directories
- 2.3. Changing to a different Directory
- 2.4. The directories . and ..
- 2.5. Pathnames
- 2.6. More about home directories and pathnames
- 2.7. Summary
3. Tutorial Two
- 3.1. Creating files
- 3.2. Copying Files
- 3.3. Moving Files
- 3.4. Removing Files and directories
- 3.5. Displaying the contents of a file on the screen
- 3.6. Searching the contents of a file
- 3.7. Summary
4. Tutorial Three
- 4.1. Redirection
- 4.2. Redirecting the Input
- 4.3. Redirecting the Output
- 4.4. Pipes
- 4.5. Summary
5. Tutorial Four
- 5.1. Wildcards
- 5.2. Filename Conventions
- 5.3. Getting Help
- 5.4. Summary
6. Tutorial Five
- 6.1. File system security (access rights)
- 6.2. Changing access rights
- 6.3. Processes and Jobs
- 6.4. Listing suspended and background processes
- 6.5. Killing a process
- 6.6. Summary
7. Tutorial Six
- 7.1. Other useful Unix commands
- 7.2. Summary
8. Tutorial Seven
- 8.1. Compiling UNIX software packages
- 8.2. Download source code
- 8.3. Extracting source code
- 8.4. Configuring and creating the Makefile
- 8.5. Building the package
- 8.6. Running the software
- 8.7. Stripping unnecessary code
- 8.8. Summary
9. Tutorial Eight
- 9.1. UNIX variables
- 9.2. Environment variables
- 9.3. Shell variables
- 9.4. Using and setting variables
- 9.5. Setting shell variables in the .cshrc file
- 9.6. Setting the path
- 9.7. Summary
10. Tutorial Nine
- 10.1. What is *vi*?
- 10.2. Essential commands
- 10.3. Practical introduction to *vim*
11. Tutorial Ten
- 11.1. Introduction to shell script
- 11.2. Create and execute a script
- 11.3. Passing parameters to the shell
12. Annex I: basic commands
13. Annex II: First steps with Erle
14. Annex III: Network connection with Erle
- 14.1. Connecting with Erle
- 14.2. A new Erle-terminal
- 14.3. Transferring files form your computer to Erle

Erle Robotics Unix Introduction Gitbook Free

Configuring and creating the Makefile

The first thing to do is carefully read the README and INSTALL text files (use the less command). These contain important information on how to compile and run the software.

The units package uses the GNU configure system to compile the source code. We will need to specify the installation directory, since the default will be the main system area which you will not have write permissions for. We need to create an install directory in your home directory.

mkdir ~/units174

Note: With this command you create the directory units174 in your home directory, but you don't move to it. Using pwdyou can check thatyou continue in the directory units-1.74

Then run the configure utility setting the installation path to this.

./configure --prefix=$HOME/units174

working with erlerobot

config

NOTE: The $HOME variable is an example of an environment variable. The value of $HOME is the path to your home directory. Just type

echo $HOME

to show the contents of this variable. We will learn more about environment variables in a later chapter.

If configure has run correctly, it will have created a Makefile with all necessary options. You can view the Makefile if you wish (use the less command), but do not edit the contents of this.