WriteByHumans

In Linux commands, {} is used as a placeholder, often in conjunction with commands like find, xargs, or tar. It typically represents a set of arguments or filenames. Below are some use cases for {} to generate number and character sequence generation:

1- Using {} with mkdir for multiple directories

cp file{1,2,3}.txt /destination/

This command copies file1.txt, file2.txt, and file3.txt to /destination/.

2- Using {} for Sequence Generation

echo {1..5}

This output: 1 2 3 4 5

3- Character Sequence Generation

echo {a..e}

Output: a b c d e

4- Number Sequence with Step Increment

echo {1..10..2}

Output: 1 3 5 7 9

5- Character Sequence with Step Increment

echo {a..z..3}

output: a d g j m p s v y