rm filename
# or add -rf if you don't want to see confirm
single:
rm filename
----OR----
unlink filename
multiple:
rm filename1 filename2 filename3
all filetype:
rm *.pdf
with confirmation:
rm -i filename
rm -i filename1 filename2 filename3
without prompting even writeprotected:
rm -f filename
rm -f filename
without a prompt in verbose mode:
rm -fv *.txt
rm *.png
#use the command rm <file or foldername>
#for example removing a file called book
rm book