|CS File Server||
cs.wellesley.edu is a file server maintained by the
Computer Science Department. The department and class webpages are on
this machine, as well as accounts for students taking CS classes.
At the beginning of the semester, each CS112 student must request an account if they do not have an existing account from a previous CS course. Your account name is the same as your Wellesley domain account name. You can choose whatever password you like.
Your CS112 password should not be anything that someone could guess (like your name, telephone number, or cat's name) or that a computer would find quickly by guessing. It should be at least 6 characters long, should not be a word in any language, and should include at least one character that is not a letter.
Examples of bad passwords: cs112, computer, sesame, abracadabra,
Examples of good passwords: 17Abby23, UpAnDdOwN 1nter3net!
Of course, these examples of good passwords are no longer good passwords, because they appear here.
Both account names and passwords are case sensitive, which means that upper and lower case letters are considered distinct.
If you forget your password, send e-mail to email@example.com.
A directory is a structure that contains files and other directories. It
corresponds to a folder on a Mac or in Windows. Associated with every CS112
account is a home directory in which files for the account are stored.
Whenever you connect to the
CS server using Fetch or WinSCP (see below), you will be connected
to your home directory.
Different directories have different permissions, which means that you may or may not be allowed to read or write files in them. Obviously, you can both read and write your home directory, but you cannot read or write other students' directories. There are some CS112 directories that you can read but not write.
The name of your home directory is the same as your account name. All home
directories on the CS112 server are located within another directory named
students, which itself is located in the
top-level directory, which is called
Directory and file names are often specified as a path name containing
the sequence of directories that must be traversed to get from the
"top" of the file system to the desired directory or file. Path names
are written with the components separated by slash ('
/') characters. For example, Georgia Dome's home
Rather than type the entire path to refer to your home directory, you can
abbreviate it with a tilde ('
often pronounced 'twiddle'). The directory
is an abbreviation for
The CS112 server file system has been preconfigured with a number of special
directories. The following examples are the directories for
gdome; you should substitute your own
/students/gdome/cs112This is for your CS112 work in progress.
/students/gdome/cs112/drop: This is the folder that contains all your submitted softcopy work for CS112
/students/gdome/cs112/drop/assigni(where i ranges from 1 to 10): This is the drop folder in which you turn in the softcopy of your work for assignment i.
cs112/downloadThis is where to find CS112 files that you can download to your computer. You can only access these downloadable files via a special username and password given out in lab.
Only you are able to write files to or delete files from your home directory, or any subdirectories thereof. Additionally, only you are able to write files to or delete files from the drop folders with your account name. Any attempt to write files in another students' home directory or drop folders will fail.
Only you are able to read files in your drop folders and your private directory (and subdirectories thereof). However, by default, all directories other than your private directory are world readable, which means that anyone may read them. If you want files to be private, you should store them in your private folder.
Note that your instructors have the ability to read, write, and delete any of your files. However, except under unusual circumstances, the only private files of yours that we will manipulate are those that you explicitly submitted to your drop folders.
To transfer files between the CS112 server and your local computer, you need
to use a Secure File Transfer Protocol (SFTP) client on your local computer. Fetch
is a MacIntosh program that provides SFTP client
services, and WinSCP is a similar program for
PCs. Information about both of these applications is available from the
Wellesley Computing webpages. To connect to the
you will have to
provide the following information:
Selecting OK should connect you to your home directory. Once you are connected through your account, you can upload files (copy onto the server), or delete files in your account on the server.
To download assignments from the cs112 server, you need to access the server
by using the special download account,
(the "d" stands for download). To do this, follow the example below:
Selecting OK will connect you as
You can then select the folder you wish to download by clicking on it once to
highlight it. Then you can drag it to your desktop. This account,
is only to be used for downloading from the
Because storage resources on the
server are limited, each student account is allocated a limited amount of disk
space, known as a quota. If you keep lots of files, or even
just a few large ones (such as images), you may find yourself exceeding the
quota. An attempt to store a file that will exceed the quota will fail.
In this case, you will need to delete some older files in order to be able to
store new ones.
File servers sometimes fail. In some cases, they may become
inaccessible for long periods of time; in other cases, they may
actually lose information. For both of these reasons, we require you
to keep copies of all your work during the semester on your own
personal media (copy to a disk, a CD, an iPod, or even email to
yourself). That way, if the
server should become inaccessible or
lose files, you will still be able to proceed with your work.
make backup copies of your work on a regular basis during the semester.
Since student accounts on the
server will be
deleted after the semester ends, you should be sure to save on your personal
media any files from the
server that you wish to keep for the future.