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Random password generator #384

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17 changes: 17 additions & 0 deletions topics/shell/excercise/answers/README.md
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# Make it executable:

- In the terminal, navigate to the directory where you saved your script.
- Run the command `chmod +x generate_password.sh` This command adds execute permissions to the script.

# Run it with the desired password length as an argument:

- After making the script executable, you can run it by providing the desired password length as a command-line argument.
- Use the following syntax: `./generate_password.sh <password_length>` , replacing `<password_length>` with the actual length you want.

Here's an example:

```shell
./generate_password.sh 12
```

This will execute the script (**generate_password.sh**) with a password length of **12** , and the script will generate and print a random password of that length. Adjust the length as needed based on your requirements.
28 changes: 28 additions & 0 deletions topics/shell/excercise/answers/generate_password.sh
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#!/bin/bash

generate_password() {
local length=$1
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@tungbq tungbq Jan 3, 2024

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Hi @alirafatartist, The CI job is failing:
image

Can we make the default value of length to be 8 if there is no input so it can be run on the CI job as well?

Something like: local length=${1:-8}

local password=""

for i in $(seq 1 $length); do
# Generate a random byte and convert it to a printable ASCII character
byte=$(od -An -N1 -i /dev/urandom | awk '{print $1}')
char=$(echo $byte | awk '{printf "%c", $1}')
password="${password}${char}"
done

echo "$password"
}

# Check if a length argument is provided
if [ -z "$1" ]; then
echo "Usage: $0 <password_length>"
exit 1
fi

# Get the password length from command line argument
password_length=$1

# Generate and print the random password
random_password=$(generate_password "$password_length")
echo "Random Password: $random_password"
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