Master Linux: Run Multiple Commands in One Line with ;, &&, and ||

Running Multiple Linux Commands in One Line

Linux terminals allow chaining commands using three operators: the semicolon ( ;), logical OR ( ||), and logical AND ( &&). Each operator determines whether subsequent commands run based on the success or failure of the preceding command.

Semicolon ( ; ) Operator

The semicolon executes commands sequentially regardless of whether the previous command succeeded. commandA ; commandB Example: display the current user name and then the system hostname.

whoami ; hostname

OR ( || ) Operator

The OR operator runs the second command only if the first command fails (returns a non‑zero exit status). commandA || commandB Example: create a file only if it does not already exist.

find . -name linuxmi.txt || touch linuxmi.txt

AND ( && ) Operator

The AND operator runs the second command only if the first command succeeds (returns a zero exit status).

mkdir linuxmi && cd linuxmi

Combining Multiple Operators

Operators can be combined to meet more complex execution criteria. For instance, you can run two commands (B and C) only if command A fails. commandA || commandB && commandC Example: create a directory named linuxmi only when it does not already exist.

find . -name linuxmi1 || echo "Directory not found" && mkdir linuxmi

Running Multiple Commands via a Shell Script

Shell scripts let you automate a series of commands. Create a file with a .sh extension, make it executable, and run it.

chmod +x linuxmi.sh

./linuxmi.sh

Sample script that updates the system:

#!/bin/bash
sudo apt update && sudo apt upgrade -y

Efficient Command Execution in Linux

Using these operators simplifies many command‑line tasks, helps beginners master the shell, and enables more powerful and concise workflows.