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8.1 UNIX Variables Variables are a way of passing information from the shell to programs when you run them. Programs look "in the environment" for particular variables and if they are found will use the values stored. Some are set by …

7.1 Compiling UNIX software packages We have many public domain and commercial software packages installed on our systems, which are available to all users. However, students are allowed to download and install small software packages in thei…

Other useful UNIX commands quota All students are allocated a certain amount of disk space on the file system for their personal files, usually about 100Mb. If you go over your quota, you are given 7 days to remove excess files. To check your…

5.1 File system security (access rights) In your unixstuff directory, type % ls -l (l for long listing!) You will see that you now get lots of details about the contents of your directory, similar to the example below. Each file (and dire…

4.1 Wildcards The * wildcard The character * is called a wildcard, and will match against none or more character(s) in a file (or directory) name. For example, in your unixstuff directory, type % ls list* This will list all files in the …

3.1 Redirection Most processes initiated by UNIX commands write to the standard output (that is, they write to the terminal screen), and many take their input from the standard input (that is, they read it from the keyboard). There is also th…

UNIX Tutorial Two 2.1 Copying Files cp (copy) cp file1 file2 is the command which makes a copy of file1 in the current working directory and calls it file2 What we are going to do now, is to take a file stored in an open access area of the…

1.1 Listing files and directories ls (list) When you first login, your current working directory is your home directory. Your home directory has the same name as your user-name, for example, ee91ab , and it is where your personal files and su…

What is UNIX? UNIX is an operating system which was first developed in the 1960s, and has been under constant development ever since. By operating system, we mean the suite of programs which make the computer work. It is a stable, multi-user, mu…