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Just some shell exercises.
1.batch_replace_file_names.sh: Batch rename files.2.sync_git.sh: A script for syncing git with one click (pull, commit, and push all changes).3.count_files.sh: Recursively count the number of files in a folder.4.billhelper.sh: Read CSV files exported from the "钱迹" app and aggregate the bill data into a PostgreSQL database.5.backup_configs.sh: Specify the file paths in an array and backup these files to a specified directory with one click.6.sort_markdown_table.sh: Sort Markdown tables by a specified column.