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In this lab, we’ll create a script for printing all file related information in present working directory (e.g.: size, permission & size etc…)
Prerequisites:
- How to execute a bash script.
- How to change execute permission of a file.
- How read man-page of a command.
Objective:
- To understand how to write and execute a basic bash script
Requirements:
- When you run the script, display all file information from current working directory
Solution:
#!/bin/bash
# Define the directory to list files in (the current directory by default)
directory="$PWD"
# Check if a directory was provided as an argument
if [ "$#" -eq 1 ]; then
directory="$1"
fi
# Use the ls command to list file information in the specified directory
ls -la "$directory"
Output
~/fileinfo$ chmod u+rwx main.sh
~/fileinfo$ ./main.sh
total 20
drwxr-xr-x 1 runner runner 126 Oct 18 15:03 .
drwxrwxrwx 1 runner runner 68 Oct 18 15:02 ..
drwxr-xr-x 1 runner runner 12 Oct 12 2021 .cache
-rw-r--r-- 1 runner runner 0 Oct 18 15:03 'Family Info.json'
-rw-r--r-- 1 runner runner 0 Oct 18 15:02 hello.txt
-rwxr--r-- 1 runner runner 297 Oct 18 15:02 main.sh
drwxr-xr-x 1 runner runner 0 Oct 18 15:03 Programs
-rw-r--r-- 1 runner runner 281 Sep 22 16:06 .replit
-rw-r--r-- 1 runner runner 110 Apr 7 2023 replit.nix