Unix System Commands
cat filenames --> Print the content of the named textfiles.
tail filename --> Print the last 10 lines of the text file.
cp file1 file2 --> Copy file1 to file2.
mv file1 file2 --> Move (rename) file1 to file2.
rm filenames --> Remove (delete) the named files.
chmod mode filename --> Change the protection mode on the named file.
ls --> List the contents of the directory.
mkdir name --> Create a directory with the given name.
rmdir name --> Remove the named directory.