Lab - Shell

One-off setup before writing shell scripts

Before starting writing shell scripts at all:

Make sure your bin directory exists.
```
  mkdir $HOME/bin 
```
Check it is in the PATH.
```
 echo $PATH 
```
If not, you need to add $HOME/bin to the PATH.
Optional: Hide your bin directory from other users:
```
  chmod go-rwx $HOME/bin 
```

For every Shell script you write, go through this checklist.

To make a new program called "prog":

Make a Shell script called "d" - detailed ls

Go through the checklist above.
Put the following command in it:
```
 ls -l $* 
```
$* means all arguments that are passed to this script
Run it:
```
 d 
```

Another simple exercise:

Make a shell script called gnews.
Usage:

gnews someargument

It uses wget to grab today's news from, say, RTE.
It then searches the page (using grep) for the argument.