$ echo
used for displaying lines of text or string which are passed as arguments on the command line
$ ls/
directory contents
$ pwd
determines the present working directory
$ cd
used to change the current working directory
$ tar
command is an archival command that can archive, compress, and extract files
mkdir
make directory
touch
create an empty file
mv
move or rename file
cat
print out contents of a file
head
print out first few lines of a file
tail
print out last few lines of file
more
to print out content of file but, only enough to fill the screen
less
used to navigate forward and backward in a file
man
to display a line of text
command for manual
ie: man echo
cp
copy one or more files into a location