BNMUSIC Nhạc Cụ Pipa Điện Cổ Điển Đàn Guitar Trung Quốc Đàn Lute Đồ Chơi

This Bash command performs the following operations:

1. `cat config.yaml`: This part of the command uses the `cat` command to concatenate and display the contents of the file named `config.yaml` to the standard output (usually the terminal).

2. `|`: This is the pipe operator, which takes the output of the command on its left (`cat config.yaml`) and uses it as the input for the command on its right (`awk NF`).

3. `awk NF`: This part of the command uses the `awk` command with a pattern-action statement. `NF` in AWK represents the number of fields (columns) in a line, and when used as a pattern, it evaluates to true for lines that have at least one field. Therefore, `awk NF` effectively filters out and prints only the lines in the output of `cat config.yaml` that are not empty (i.e., lines with at least one field).

In summary, the overall command takes the contents of the file `config.yaml`, filters out empty lines, and displays the non-empty lines on the terminal.