Log Monitoring Bash Script Enhanced 💫

As described in the blog post, the script can pull the logs from different servers, and this enhanced script allows you to define variables in a properties file, additionally, this script now accepts optional command-line arguments (`-u, -p, -v, -l, -f`) to set the username, password, VMs, log paths, and environment file. If not provided, it prompts the user for the username and password. The environment file (default: .env) can be used to define these properties, and the script will load it for validation.

The script includes an optional `-s` flag to use `sshpass`. If the user specifies this flag and `sshpass` is not installed, it will display an error message. If the flag is not used, the script will use regular ssh for the connections.


```
# .env file for log monitoring script

# Define your username
USERNAME=your_username

# Define your password
PASSWORD=your_password

# Define VM addresses and corresponding log file paths
VMS=("vm1.example.com" "vm2.example.com" "vm3.example.com" "vm4.example.com")
LOG_PATHS=("/path/to/log1.log" "/path/to/log2.log" "/path/to/log3.log" "/path/to/log4.log")
```

Save this content into a file named `.env` in the same directory as your script. The script will then automatically load these configurations if the -f option is not provided.