Help Unix scripts

#!/bin/bash # Calculate date and time 1 month ago from current system date cutoff_date=$(date -d "1 month ago" +%Y%m%d%H%M%S) # Define the directory containing log files (modify path as needed) log_directory="/home/log/SHELL_SCRIPTING" # Define pattern for files with any prefix followed by 'YYYYMMDDHHMMSS' and optional suffix file_pattern="*20[0-9][0-9][0-1][0-9][0-3][0-9][0-2][0-9][0-5][0-9][0-5][0-9]*" # Get files matching the pattern files=$(find "$log_directory" -maxdepth 1 -type f -name "$file_pattern") for file in $files; do # Extract date and time from filename (assumes format like any_prefix_YYYYMMDDHHMMSS_*) if [[ $file =~ .*_([0-9]{14}) ]]; then datetime_string=${BASH_REMATCH[1]} # Parse the date and time from filename (YYYYMMDDHHMMSS) file_datetime=$(date -d "$datetime_string" +%Y%m%d%H%M%S 2>/dev/null) if [[ -n $file_datetime && $file_datetime -lt $cutoff_date ]]; then # Delete the file rm -f "$file" echo "Deleted: $file" fi else echo "Could not parse date and time from file: $(basename "$file")" >&2 fi