Append line(s) to end of a file
$ cat >> notes.txt
Get milk on the way home
Ctrl-DCreate a new file
$ cat > awesome_script.rb
#!/usr/bin/env ruby
puts "Hello World!"
Ctrl-DCount occurrences of a string
$ cat <path_to_files> | grep -c <string>$ cat >> notes.txt
Get milk on the way home
Ctrl-D$ cat > awesome_script.rb
#!/usr/bin/env ruby
puts "Hello World!"
Ctrl-D$ cat <path_to_files> | grep -c <string>