24.Multiple_Commands_In_Single_Line.md

How to Use Multiple Commands in a Single Line

You can execute multiple independent commands in a single line using the following two methods:

1st Method: Using a semicolon (;)

cmd1; cmd2; cmd3; ..... ; cmdn

• First, cmd1 will be executed, then cmd2, followed by the remaining commands.
• If any command fails in the middle, the rest of the commands will still be executed.

2nd Method: Using &&

cmd1 && cmd2 && cmd3 && ..... && cmdn

• First, cmd1 will be executed, then cmd2, followed by the remaining commands.
• If any command fails in the middle, the remaining commands will not be executed.

Example:

Create a directory dir1, create files a.txt, b.txt, c.txt inside dir1, write the current system date and time to a.txt, and write the current month's calendar to b.txt:

mkdir dir1 ; touch dir1/{a,b,c}.txt ; date > dir1/a.txt ; cal > dir1/b.txt

Using &&:

mkdir dir1 && touch dir1/{a,b,c}.txt && date > dir1/a.txt && cal > dir1/b.txt

Demonstrating failure handling:

mkdir dir1 ; touch dir1/{a,b,c}.txt ; Date > dir1/a.txt ; cal > dir1/b.txt

• Here, the 3rd command fails, but the 4th command is still executed.

mkdir dir1 && touch dir1/{a,b,c}.txt && Date > dir1/a.txt && cal > dir1/b.txt

• Here, the 3rd command fails, and as a result, the 4th command is not executed.

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