Linux Command Line Tutorial (Learn Linux Basics)

Learn to create directories in Linux using mkdir, including nested structures with -p/--parents and braces for multiple directories.

Learn to use rm and rmdir on Linux to remove files and directories, including empty directories and recursive operations with verbose output.

Learn how to use the cp command to copy files and directories in Linux, including source and destination paths, interactive prompts, and recursive copies.

Learn how the less command in Linux reads large text files, navigates with space and arrow keys, searches with / or ?, and exits with q.

Learn how to use the touch command to create empty files and update file timestamps in Linux from the terminal, including examples and basic usage.

Learn how to use the sudo command in Linux to run commands with root privileges, handle a permission denied error, and install software with apt get.

Explore the top command for a dynamic real-time view of running processes, memory usage, and process ids, with filtering idle processes and the ability to kill processes.

learn how to use the kill command to terminate linux processes, locate pids with ps or top, and apply forceful options like kill -9 when needed.

Learn to use the echo command to display text, declare and echo variables in bash, and enable backslash escape sequences with -e for scripting.

Learn how to view and modify Linux file permissions using symbolic chmod notation (r, w, x) for user, group, and others, with plus minus and equals forms.

Learn to change Linux directory permissions with chmod, observe user, group, and others' read, write, and execute bits, and test access by creating files and listing contents.

Master octal and numerical permissions in Linux by learning how to set user, group, and others permissions as read, write, and execute with chmod.

Learn bash scripting basics in Linux by creating and executing a hello world script, understanding the shebang line and bash location, and setting execute permissions with chmod.

Learn to create linux users with the useradd command, creating a home directory, setting a shell and group, and assigning a comment, then set the password with sudo and passwd.

Learn to remove a user in Linux from the command line with sudo userdel. The -r flag deletes the home directory when needed, otherwise the home directory remains.

Learn how the bashrc file runs automatically at each new terminal session, letting you set aliases, tailor ls with color options, and configure environment variables like JAVA_HOME and git tools.

Master head and tail commands in Linux to view the first or last lines of log files, customize line counts with -n, and follow updates in real time with -f.

Learn how the find command searches for files in a directory hierarchy, using names, wildcards, and extensions, while handling permission denied with sudo and time-based searches.

Explore how the wc command in Linux counts lines, words, and characters, using options -l, -w, -c, and -L to tailor output for files.

Use the cal command to display calendars on the Linux command line, view the current or a chosen month and year, and use -3 for previous and next months.

Use the date command to display the current date and time or set the system date with -s; consult the man page for more date format options.

Learn to run multiple Linux commands by combining them with a semicolon, the and operator, and the or operator, understanding command sequencing, success or failure, and practical examples.

Learn how to use apt-get to install, remove, update, and manage packages on Debian-based systems, handling dependencies safely.

Learn how to use grep to search for patterns in text files, handle case sensitivity with -i, print matching lines and line numbers, and search across multiple files.

Learn to use the Linux netstat command to view network connections, routing tables, and interface statistics; explore listening, established, and UDP/Unix connections, and use -a, -n, and less for paging.

Enable ssh on Ubuntu 16.04 by installing openssh-server, verifying client and server, starting ssh, and optionally changing the default port in sshd_config to connect securely.

Learn to securely transfer files with scp between local and remote servers. Use -r, -P, and -i options for recursive, port, and key-based transfers.