Getting Started with Unix (specifically QNX)

Getting started in unix is easy. Here are simple steps to working on a UNIX box.

Logging in

Logging in: To log in you have 2 prompts. Both fields are case sensitive. The first prompt will be your username; the second prompt will be your password. If you remember that this is case sensitive, you are easily on a unix system.
In QNX log in as root, otherwise you won't have the necessary privledges to do much.
root is all-powerful! Don't make a mess or you'll have to reinstall the QNX OS
After you log in to QNX's graphic interface, click the "terminal" button to open a text window for typing unix commands

Directory Commands:

Tell you what directory you are in: pwd
To find out what directory you are in, use pwd, which stands for print working directory.
Changing directories: cd directory
To change your directory simply use cd directory-name. In UNIX, if you are using a full path use the forward slash. For example, a user named "joe" may have his home directory in /home/joe. Joe can get to his default home directory by simply typing cd. If he wants to be in /tmp, he would type cd /tmp
- / means "top directory"
- . means "this directory"
- .. means "the directory above this directory" (parent) as in cd ..
Making directories: mkdir directory
Use the mkdir command to make one or more directories.
Make yourself a working directory for your stuff: mkdir /myname

Removing directories: rmdir directory
Use the rmdir command to remove one or more directories.

File Commands:

Listing files: ls
To list files you use the ls command. This simply lists the files in a directory. There are many variations of this command. That is, you can add options to see hidden files, time stamps of files, and permissions. If you ls filename, you will see is filename exists. If filename is actually a directory, you will be able to see see the contents of that directory.
ls -l is a "long" format listing with more info
Often the first thing one does is do a ls when they log into a system. This allows them to see what files they are using and are working on.
Moving files: mv
You move files with the mv command. Simply mv file newfilename. You can move a file to another filename or into a directory.
Copying files: cp
You copy files with the cp command. Simply cp file newfilename. You can copy a file to another filename or into a directory.
Removing files: rm
You remove files with the rm command. Simply rm file newfilename. You can remove many files at once. Unlike windows, you can NOT back out of a remove. Be certain that you want to remove a file.
Editting files: vi or emacs or pico
As each editor of files is vastly different, you will want to learn these separately. Usually, new users will find pico easiest to learn. However, not all unix systems have pico. Hence, you may need to learn vi
QNX comes with the ped editor: ped filename

Getting Help:

Getting help: man -k topic
The man command helps you get manual information. Run man -k topic to find the man page you need. Then run man commandname to get help with the actual command.
QNX has no man command - see the html or pdf online reference docs instead

Compiling and running programs:

to compile: qcc yourprogram.c servotogo.c -o executablefilename
sometimes you need to link in a library like -lsocket (no space between -l and socket)
to run it: ./executablefilename

Random other things: