# Excersises for learning bash shell scripting

## Easy

#### 1. Create a program that counts the number of files in a directory. It should also check that the argument given is a directory.
Use:

`$ ./count foo`

Results:

`$ foo is not a directory`

`$ There are 5 files in foo`

#### 2. Create a program that counts the number of files in 2 directories and tells you which has the most. It should also check that the arguments given are directories.

Use:
`$ ./count foo bar`

Results:

`$ foo has the most files (4)`

`$ foo and bar both have 3 files`

#### 3. Create a program that creates a new executable file with the given name. The script must add executable permission for the user and should add the shebang (#!/bin/bash) to the top line of the file

Use:
`$ ./create foo`

Results:

`$ foo already exists`

`$ Success! Executable file foo.sh created`

#### 4. Create a script that tells you the difference in length between two files. It should also check that both files exist.

Use:
`$ ./check foo bar`

Results:

`$ file foo does not exist`

`$ files foo and bar both have 100 characters`

`$ file foo has 23 more characters than file bar`

#### 5. Create a script that tells you which file in a directory has the longest name. The script should check the argument is a directory and also that it contains more than 1 file.

Use:
`$ ./count foo`

Results:

`$ foo is not a directory`

`$ foo does not contain any files`

`$ hello_world.txt has the longest filename in foo`

#### 6. Create a script that takes 2 directories and tells you how many filenames of the same name exist in both directories. It should also check that the directories exist and are directories.

Use:
`$ ./duplicates foo bar`

Results:

`$ foo does not exist`

`$ bar is not a directory`

`$ foo and bar have 4 files in common`

#### 7. Create a script that takes a file full of space-separated words and prints the words separated by line, ordered alphabetically. It should also check that the file exists.

Use:
`$ ./separate words.txt`

Results:
`$ words.txt does not exist`
```
apple
feather
horse
pinecone
```