From f642cf1ccc4abb2b2580b445dde8ef2e404a1b7e Mon Sep 17 00:00:00 2001 From: Jed Brown Date: Sat, 12 Jan 2013 09:52:53 -0600 Subject: [PATCH] Fix paths in shell section --- shell/Readme.md | 63 +++++++++++++++++++++++++------------------------ 1 file changed, 32 insertions(+), 31 deletions(-) diff --git a/shell/Readme.md b/shell/Readme.md index 3a3b402..f09eb9b 100644 --- a/shell/Readme.md +++ b/shell/Readme.md @@ -64,6 +64,7 @@ command: Followed by: + cd boot-camps git checkout 2013-01-chicago These 2 commands will grab all of the data needed for this workshop from the @@ -145,10 +146,10 @@ 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 `SWC-bootcamp` +directory) is used to move around. Let's move into the `boot-camps` directory. Enter the following command: - cd SWC-bootcamp + cd boot-camps 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 @@ -158,10 +159,10 @@ with a star. This directory contains all of the material for this boot camp. Now move to the directory containing the data for the shell tutorial: - cd 1-Shell + cd shell If you enter the `cd` command by itself, you will return to the home -directory. Try this, and then navigate back to the `1-Shell` +directory. Try this, and then navigate back to the `shell` directory. ## Arguments @@ -195,19 +196,19 @@ 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 SWC-bootcamp + ls boot-camps -This will list the contents of the `SWC-bootcamp` directory without +This will list the contents of the `boot-camps` directory without you having to navigate there. Now enter: - ls SWC-bootcamp/1-Shell + ls boot-camps/shell -This prints the contents of `1-Shell`. The `cd` command works in a +This prints the contents of `shell`. The `cd` command works in a similar way. Try entering: - cd SWC-bootcamp/1-Shell + cd boot-camps/shell -and you will jump directly to `1-Shell` without having to go through +and you will jump directly to `shell` without having to go through the intermediate directory. ## Full vs. Relative Paths @@ -230,16 +231,16 @@ directory in `home` which is a directory in `/`. Now enter the following command: - cd /home/swc/SWC-bootcamp/1-Shell + cd /home/swc/boot-camps/shell -This jumps to `1-Shell`. Now go back to the home directory. We saw +This jumps to `shell`. Now go back to the home directory. We saw earlier that the command: - cd SWC-bootcamp/1-Shell + cd boot-camps/shell -had the same effect - it took us to the `1-Shell` directory. But, +had the same effect - it took us to the `shell` directory. But, instead of specifying the full path -(`/home/swc/SWC-bootcamp/1-Shell`), we specified a *relative path*. In +(`/home/swc/boot-camps/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 @@ -257,7 +258,7 @@ familiar in there? There are some shortcuts which you should know about. Dealing with the home directory is very common. So, in the shell the tilde character, -`~`, is a shortcut for your home directory. Navigate to the `1-Shell` +`~`, is a shortcut for your home directory. Navigate to the `shell` directory, then enter the command: ls ~ @@ -268,7 +269,7 @@ above your current directory. Thus: ls .. -prints the contents of the `/home/swc/SWC-bootcamp`. You can chain +prints the contents of the `/home/swc/boot-camps`. You can chain these together, so: ls ../../ @@ -323,7 +324,7 @@ onto more advanced shell topics... **Wild cards** -Navigate to the `~/SWC-bootcamp/Shell-1/data/THOMAS` directory. This +Navigate to the `~/boot-camps/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 @@ -380,7 +381,7 @@ directory name. For example, enter: cd S The shell will fill in the rest of the directory name for -`SWC-bootcamp`. Now enter: +`boot-camps`. Now enter: ls 3 @@ -439,14 +440,14 @@ shell looks for programs to run. If your program is not in this list, then an error is printed. The shell ONLY checks in the places listed in the `PATH` environment variable. -Navigate to the `1-Shell` directory and list the contents. You will +Navigate to the `shell` directory and list the contents. You will notice that there is a program (executable file) called `hello` in 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/swc/SWC-bootcamp/1-Shell` is not in the +because the directory `/home/swc/boot-camps/shell` is not in the `PATH`. You can run the `hello` program by entering: ./hello @@ -456,11 +457,11 @@ 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/swc/SWC-bootcamp/1-Shell/hello + /home/swc/boot-camps/shell/hello Or by entering: - ../1-Shell/hello + ../shell/hello When there are no `/` characters, the shell assumes you want to look in one of the default places for the program. @@ -487,12 +488,12 @@ is where the name comes from, `cat` is short for concatenate). * * * * **Short Exercises** -1. Print out the contents of the `~/SWC-bootcamp/1-Shell/dictionary.txt` +1. Print out the contents of the `~/boot-camps/shell/dictionary.txt` file. What does this file contain? -2. Without changing directories, (you should still be in `1-Shell`), +2. Without changing directories, (you should still be in `shell`), use one short command to print the contents of all of the files in - the /home/swc/SWC-bootcamp/1-Shell/data/THOMAS directory. + the `/home/swc/boot-camps/shell/data/THOMAS` directory. * * * * @@ -500,7 +501,7 @@ is where the name comes from, `cat` is short for concatenate). be annoying to use. The program, `less`, is useful for this case. Enter the following command: - less ~/SWC-bootcamp/1-Shell/dictionary.txt + less ~/boot-camps/shell/dictionary.txt `less` opens the file, and lets you navigate through it. The commands are identical to the `man` program. Use "space" to go forward and hit @@ -532,7 +533,7 @@ in reverse while using `less`. ## Redirection Let's turn to the experimental data from the hearing tests that we -began with. This data is located in the `~/SWC-bootcamp/1-Shell/data` +began with. This data is located in the `~/boot-camps/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 @@ -559,7 +560,7 @@ exists. Use `>>`, to append the contents of all of the files which contain the number 4 in the directory: - /home/swc/SWC-bootcamp/1-Shell/data/gerdal + /home/swc/boot-camps/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 @@ -759,7 +760,7 @@ name to the file, then sort it and make a new file called Sorted. * * * * -Let's navigate back to `~/SWC-bootcamp/1-Shell/data`. Enter the following command: +Let's navigate back to `~/boot-camps/shell/data`. Enter the following command: wc Bert/* | sort -k 3 -n @@ -910,7 +911,7 @@ require a find command): Hint: If you make a mistake and need to start over just do the following: -1. Navigate to the `1-Shell` directory +1. Navigate to the `shell` directory 2. Delete the `data` directory -- 2.26.2