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Computer Research Lab |
Telnet and ssh are utilities that allow you to connect to a remote machine. The program ssh provides a secure connection while telnet does not. If you have an account on a different machine than you are on, you may want to log in to the remote machine and work there. When you telnet or ssh to the remote machine, you will be using that machine's resources.
To telnet to a machine, issue the command
telnet machine_name
To ssh to a machine, issue the command
ssh machine_name
where the machine name is either the name of the machine or the actual IP address of the machine. When you are connected to the remote machine, you will be asked to log in. Your session from that point runs as normal.
FTP stands for "File Transfer Protocol" It provides the user with an interactive session allowing him or her to put files on or retrieve files from another machine.
FTP can be invoked with the command
ftp hostname
where hostname is the name of the host to which you wish to connect.
For example, to connect to the machine eagle2.ben.edu, you would issue the command
ftp eagle2.ben.edu
FTP will then prompt you for a username and password. You should enter the username and password for the account that you have on the remote machine. If you do not have an account on the remote machine, certain systems will allow you to log in with the username anonymous and password my_address@myhost.com where the specified email address is your email address.
The following commands can be used to find files and move between directories on the remote computer.
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pwd |
Prints the directory on the remote machine that you are currently looking at and working with. |
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cd directory |
Changes the current directory to the specified directory. |
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cdup cd .. |
Changes the current directory to the parent directory, the one "above" the current directory. |
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ls |
Prints a listing of the current directory of the remote computer. |
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dir |
Prints a long listing of the current directory of the remote computer. Works like ls -l at the command prompt. |
It is easiest to start ftp from the directory that you wish to work with (i.e. the directory that contains the files you wish to transfer). However, the following commands help with movement between directories on your home machine while inside an FTP session.
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lpwd |
Prints the working directory on your home machine. |
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lcd local_directory |
Changes to the specified directory on your local machine. |
Before transferring any files, it is necessary to specify the file transfer type. If the files that you will be getting are text files, set the type to A by typing ascii at the command line. If the files are binary files (i.e. executable files), set the type to I by typing bin at the command line.
The following commands will allow you to retrive files from the remote system or transfer files to the remote system.
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get filename |
Gets the specified file from the remote machine. |
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put filename |
Puts the specified file into the current directory on the remote machine. |
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mget file_list |
Gets multiple files, specified in the file list, from the remote machine. Wildcards can be used with a multiple get, i.e. mget s*.exe will get all files of type 'exe' starting with the letter 's'. |
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mput file_list |
Puts multiple files, specified in the file list, into the working directory on the remote machine. As with mget, wildcards can be used. |
The commands bye, close, or quit can all be used to close your ftp connection.
Hardware
- Network - Linux Info
- Scyld/Beowulf - What is CRL
- Links
Last Revised:
12 January, 2004
rmeeker@ben.edu
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