Output text to the terminal:
echo "Hello, world!"
Output text to a file:
echo "Some text" > file.txt
Append text to a file:
echo "More text" >> file.txt
Display the current working directory:
echo $PWD
Display the current username:
echo $USER
Output a variable with text:
name="John"
echo "My name is $name"
Disable the newline character:
echo -n "This text will be printed on the same line"
Enable escape characters:
echo -e "This text contains a tab character:\\tTab"