Linux commands are essential for navigating and managing files and directories in a Linux-based operating system. Let's look at the commands to perform the tasks you mentioned:
1. Check your present working directory: The command to check the present working directory (the directory you are currently in) is pwd. It stands for "print working directory."
pwd
2. List all the files or directories including hidden files: To list all files and directories in the current directory, including hidden files (files or directories starting with a dot "."), you can use the ls command with the -a option.
ls -a
3. Create a nested directory A/B/C/D/E: To create a nested directory structure like A/B/C/D/E, you can use the mkdir command with the -p option, which creates parent directories if they don't exist.
mkdir -p A/B/C/D/E
Make sure you execute this command in the directory where you want to create the nested structure.
Example: Suppose you are currently in the home directory (~) and you want to create the nested directory structure there. The steps would be as follows:
cd ~ # Change to the home directory (you may already be there)
mkdir -p A/B/C/D/E
After running these commands, the nested directory structure A/B/C/D/E will be created in your home directory (~).
Remember that Linux is case-sensitive, so ensure that you use the correct letter case for directory names and commands. Additionally, exercise caution when creating or modifying directories to avoid accidental data loss. Always double-check your commands before executing them.