• Linux are used mostly in many devices, web servers.
• Linux is based on Unix
• It’s an umbrella term
• Ubuntu is most common and lightweight
• Terminal is used to interact with Linux if no GUI is installed
• echo is used to output text
• whomai prints current username
• ls list files in a directory
• cd change directory
• cat concatenate file contents to output
• pwd print working directory
• find command can be used to find files efficiently

Finding a file with find

find -name filename.txt

To find all files with txt extension use :

find -name *.txt

• The grep command allows us to search the contents of files for specific values that we are looking for
• wc can be used to find number of lines , words or characters