From: Sasha Wood Date: Sun, 10 Jun 2012 01:41:30 +0000 (-0400) Subject: Modified 1-Shell to use swc in place of thw and \nSWC-bootcamp in place of UofCSCBC20... X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=cc54762a22aa5d82dc77c3d3c46a53c187f922dc;p=swc-workshop.git Modified 1-Shell to use swc in place of thw and \nSWC-bootcamp in place of UofCSCBC2012 so as to have correct org and repo name. --- diff --git a/1-Shell/Readme.md b/1-Shell/Readme.md index ff6f468..a106215 100644 --- a/1-Shell/Readme.md +++ b/1-Shell/Readme.md @@ -1,7 +1,7 @@ # The Shell -[Back To The Menu](http://github.com/thehackerwithin/UofCSCBC2012/) -- [Forward to Python Variables](http://github.com/thehackerwithin/UofCSCBC2012/tree/master/2a-PythonVariables/) +[Back To The Menu](http://github.com/JHU-SWC-2012/SWC-bootcamp/) +- [Forward to Python Variables](http://github.com/JHU-SWC-2012/SWC-bootcamp/tree/master/2a-PythonVariables/) * * * * * @@ -51,7 +51,7 @@ by manipulating some experimental data from a hearing tests. To get the data for this test, you will need internet access. Just enter the command: - git clone git://github.com/thehackerwithin/UofCSCBC2012.git + git://github.com/JHU-SWC-2012/SWC-bootcamp.git This will grab all of the data needed for this workshop from the internet. @@ -120,8 +120,8 @@ can contain other files or directories. Whenever you start up a terminal, you will start in a special directory called the *home* directory. Every user has their own home directory where they have full access to do whatever they want. In -this case, the `pwd` command tells us that we are in the `/home/thw` -directory. This is the home directory for the `thw` user. That is our +this case, the `pwd` command tells us that we are in the `/home/swc` +directory. This is the home directory for the `swc` user. That is our user name. You can always find out your user name by entering the command `whoami`. @@ -167,10 +167,10 @@ you will see that `testfile` is gone. **Changing Directories** Now, let's move to a different directory. The command `cd` (change -directory) is used to move around. Let's move into the `UofCSCBC2012` +directory) is used to move around. Let's move into the `SWC-bootcamp` directory. Enter the following command: - cd UofCSCBC2012 + cd SWC-bootcamp Now use the `ls` command to see what is inside this directory. You will see that there is an entry which is green. This means that this @@ -218,17 +218,17 @@ give `ls` the names of other directories to view. Navigate to the home directory if you are not already there. Then enter the command: - ls UofCSCBC2012 + ls SWC-bootcamp -This will list the contents of the `UofCSCBC2012` directory without +This will list the contents of the `SWC-bootcamp` directory without you having to navigate there. Now enter: - ls UofCSCBC2012/1-Shell + ls SWC-bootcamp/1-Shell This prints the contents of `1-Shell`. The `cd` command works in a similar way. Try entering: - cd UofCSCBC2012/1-Shell + cd SWC-bootcamp/1-Shell and you will jump directly to `1-Shell` without having to go through the intermediate directory. @@ -242,27 +242,27 @@ hierarchy. The full path tells you where a directory is in that hierarchy. Navigate to the home directory. Now, enter the `pwd` command and you should see: - /home/thw + /home/swc which is the full name of your home directory. This tells you that you -are in a directory called `thw`, which sits inside a directory called +are in a directory called `swc`, which sits inside a directory called `home` which sits inside the very top directory in the hierarchy. The very top of the hierarchy is a directory called `/` which is usually -referred to as the *root directory*. So, to summarize: `thw` is a +referred to as the *root directory*. So, to summarize: `swc` is a directory in `home` which is a directory in `/`. Now enter the following command: - cd /home/thw/UofCSCBC2012/1-Shell + cd /home/swc/SWC-bootcamp/1-Shell This jumps to `1-Shell`. Now go back to the home directory. We saw earlier that the command: - cd UofCSCBC2012/1-Shell + cd SWC-bootcamp/1-Shell had the same effect - it took us to the `1-Shell` directory. But, instead of specifying the full path -(`/home/thw/UofCSCBC2012/1-Shell`), we specified a *relative path*. In +(`/home/swc/SWC-bootcamp/1-Shell`), we specified a *relative path*. In other words, we specified the path relative to our current directory. A full path always starts with a `/`. A relative path does not. You can usually use either a full path or a relative path @@ -291,12 +291,12 @@ above your current directory. Thus: ls .. -prints the contents of the `/home/thw/UofCSCBC2012`. You can chain +prints the contents of the `/home/swc/SWC-bootcamp`. You can chain these together, so: ls ../../ -prints the contents of `/home/thw` which is your home +prints the contents of `/home/swsc` which is your home directory. Finally, the special directory `.` always refers to your current directory. So, `ls`, `ls .`, and `ls ././././.` all do the same thing, they print the contents of the current directory. This may @@ -304,12 +304,12 @@ seem like a useless shortcut right now, but we'll see when it is needed in a little while. To summarize, the commands `ls ~`, `ls ~/.`, `ls ../../`, and `ls -/home/thw` all do exactly the same thing. These shortcuts are not +/home/swc` all do exactly the same thing. These shortcuts are not necessary, they are provided for your convenience. **Wild cards** -Navigate to the `~/UofCSCBC2012/Shell-1/data/THOMAS` directory. This +Navigate to the `~/SWC-bootcamp/Shell-1/data/THOMAS` directory. This directory contains our hearing test data for THOMAS. If we type `ls`, we will see that there are a bunch of files which are just four digit numbers. By default, `ls` lists all of the files in a given @@ -366,7 +366,7 @@ directory name. For example, enter: ls U The shell will fill in the rest of the directory name for -`UofCSCBC2012`. Now enter: +`SWC-bootcamp`. Now enter: ls D @@ -421,7 +421,7 @@ this directory. Now, try to run the program by entering: hello You should get an error saying that hello cannot be found. That is -because the directory `/home/thw/UofCSCBC2012/1-Shell` is not in the +because the directory `/home/swc/SWC-bootcamp/1-Shell` is not in the `PATH`. You can run the `hello` program by entering: ./hello @@ -431,7 +431,7 @@ directory. This tells the shell to run the `hello` program which is located right here. So, you can run any program by entering the path to that program. You can run `hello` equally well by specifying: - /home/thw/UofCSCBC2012/1-Shell/hello + /home/swc/SWC-bootcamp/1-Shell/hello Or by entering: @@ -467,7 +467,7 @@ is where the name comes from, `cat` is short for concatenate). 2. Without changing directories, (you should still be in `1-Shell`), use one short command to print the contents of all of the files in - the /home/milad/UofCSCBC2012/1-Shell/data/THOMAS directory. + the /home/swc/SWC-bootcamp/1-Shell/data/THOMAS directory. * * * * @@ -507,7 +507,7 @@ argument for the program `mplayer` does. `mplayer` video playing program. ## Redirection Let's turn to the experimental data from the hearing tests that we -began with. This data is located in the `~/UofCSCBC2012/1-Shell/data` +began with. This data is located in the `~/SWC-bootcamp/1-Shell/data` directory. Each subdirectory corresponds to a particular participant in the study. Navigate to the `Bert` subdirectory in `data`. There are a bunch of text files which contain experimental data @@ -534,7 +534,7 @@ exists. Use `>>`, to append the contents of all of the files which contain the number 4 in the directory: - /home/thw/UofCSCBC2012/1-Shell/data/gerdal + /home/swc/SWC-bootcamp/1-Shell/data/gerdal to the existing `all_data` file. Thus, when you are done `all_data` should contain all of the experiment data from Bert and any @@ -674,13 +674,13 @@ there waiting for input. That input can come from the user's keyboard Notice that your cursor just sits there blinking. Tail is waiting for data to come in. Now type: - Milad - is + French fries + are good then CONTROL+d. You should is the lines: - is + are good printed back at you. The CONTROL+d keyboard shortcut inserts an @@ -702,10 +702,10 @@ learn to become proficient with the pipe and redirection operators: Let's create a file with some words to sort for the next example. We want to create a file which contains the following names: - Katy - Milad - Anthony - Joshua + Bob + Alice + Diane + Charles To do this, we need a program which allows us to create text files. There are many such programs, the easiest one which is @@ -732,7 +732,7 @@ name to the file, then sort it. * * * * -Let's navigate back to `~/UofCSCBC2012/1-Shell/data`. You should still +Let's navigate back to `~/SWC-bootcamp/1-Shell/data`. You should still have the `all_data` file hanging around here. Enter the following command: wc Bert/* | sort -n -k 3