command-line-workshop

For this workshop, you will be working inside the DecodeMTL project in your Cloud9. However, you will be creating a separate Git repository to submit your answers.

• Start by forking this repository to your own GitHub account.
• In your Cloud9, move to your home directory and clone your fork of the repository
• You will be doing most of your work inside this cloned, empty repo

History

• Create a branch cmd-history off of master
• Create a file called history.txt that contains all your history so far
• Add and commit this file to Git
• Push the branch to GitHub and create a pull request to submit your answer

Searching for files

• Create a branch called finding-files off of master
• Find all the files in the DecodeMTL project that have the word "logo" in the file name
• Take the output of the command to a file called files-with-logo.txt
• Add/commit that file to Git
• Find all the files in the DecodeMTL project that are over 500KB
• Take the output of the command to a file called files-over-500kb.txt
• Add/commit that file to Git
• Push the branch to GitHub and create a pull request to submit your answer

Searching for content in files

• Create a branch called finding-content off of master
• Find all the files in the DecodeMTL project that contain the word "javascript"
• Take the output of the command to a file called files-with-javascript.txt
• Add/commit that file to Git
• Do the same thing you did, but adding the line numbers to the found files
• Take the output of the command to a file called files-with-javascript-numbers.txt
• Using the manual page, figure out how to only output the file names only rather than the content
• Take the output of that new command to a file called filenames-with-javascript.txt
• Add/commit that file to Git
• Push the branch to GitHub and create a pull request to submit your answer

Pipes and redirection

• Create a branch called pipes-and-redirection
• Install the command-line application called fortune
• Try running the fortune application by itself
• Read the manual page for the fortune application to see if you can do anything fun with it
• Run the fortune application again and send its output to a file called fortune.txt
• Using the tr command (you'll have to read the manual page), see if you can replace all instances of the letter e with an underscore _ in the fortune .txt file
• Again, using the tr command, send its output to a file called fortune-replaced.txt
• Using a combination of fortune and cowsay, try to make the cow say a fortune
• Take the output of the cow saying its fortune to a file called cow-fortune.txt
• Add/commit all your files
• Push the branch to GitHub and create a pull request to submit your answer

Advanced pipes and redirection

• Learn more about the sort command
• Learn more about the uniq command
• Learn more about the wc command
• Using one of the previous commands, count the number of words in the poem.txt file and send that to a file called poem-words.txt
• Using one of the previous commands, count the number of lines in the poem.txt file and send that to a file called poem-lines.txt
• Sort the poem.txt file in alphabetical order, and send this output to poem-sorted.txt
• Create a file called poem-unique.txt that contains the sorted poem, but without duplicate lines
• Create a file called poem-popular.txt that contains the lines of the poem sorted in the order they appear most often
• Create a file called poem-hipster.txt that contains ONLY the lines that appear once in the poem