Unix Command Course for Beginners

Explore the concept of the working directory and learn how typing commands reveals the present working directory.

Remove directories, including non-empty ones, using rm -r, after examining the structure with tree and navigating into subdirectories like A, B, and C; proceed cautiously in production environments.

Learn how the touch command creates empty files and updates file timestamps, and examine access and modified times using stat to adjust a file's timestamps.

Learn how to use the touch command to create empty files in Unix, including creating multiple files in one go and basic file creation concepts.

Learn how to use the touch command to modify a file’s access and modification times, with and without explicit timestamps, and observe default current timestamps.

Learn how to use the touch command to modify file timestamps, observe current and explicit timestamps, and reset file times in a Unix beginner workflow.

Learn how to use the touch command to update access, modification, and change times on files, and apply the no-create option to avoid creating non-existent files.

Learn how to use cat to view and create files, concatenate content, and redirect command output to files, including interactive text input and saving it with redirection.

Learn to concatenate two files using the cat command and redirect the result into a new file. Create, view, and verify file contents by listing, reading, and concatenating with cat.

Learn how to copy files with the cp command, include copying into specific directories, using wildcard patterns, and verifying results by listing the destination contents.

Learn how to move and rename files between directories, create new directories, and view or write content using echo, cat, and redirection.

Learn to remove files and directories using the rm command, including deleting a file and attempting to remove a directory. Explain why removing a directory requires a special option.

Explore global search with regular expressions to find lines containing single digits (0-9), print matches, and filter lines by starting digit or digit range using grep.

Explore global search techniques with grep by matching and counting lines, using invert match and ignore case options, and practicing regular expressions to refine results.

Learn sorting with the Unix sort command, ordering data in ascending and descending order, and removing duplicates with -u. Practice on sample data and verify if input is already sorted.

Print specific fields from delimited data by column numbers, using space or comma delimiters, and practice printing multiple fields.

Explore awk for columnar data by printing specific fields with $1, $2, or $0, using -F to set the delimiter, and using begin and end blocks to process data.

See a simple awk example that reads a one-column input file, initializes a sum, and adds each field using $0, illustrating begin blocks and columnar data processing.

Learn to edit an input file with stream editor commands by inserting and appending lines at a specific position, then save and verify the updated content.

Discover how the stream editor searches input data for pattern matches, prints relevant lines like those containing color or log strings, and performs global substitutions with the g flag.

Learn to create and manage compressed archives with zip in a Unix environment, including backups and moving files to backup folders. Unzip and extract files to restore originals when needed.

Learn to create tar archives, compress them with zip and gzip, and extract files for backups, showcasing practical archival and compression workflows.