Monday, December 22, 2014

FTP (File Transfer Protocol) Command Examples

The FTP (file transfer program) utility is used to transfer files between a local machine and remote network machine Using the File Transfer protocol. In simple terms it transfers / copies files between two computers. You can transfer files between unix systems and also non-unix systems like windows operating system using FTP.

The FTP command is simple to use and easy to learn. Let see useful examples of FTP command in detail.

FTP Command Examples:

If you are using windows operating system, open the command prompt and practice the below FTP commands. If you are using unix or linux operating systems, just simply type the ftp command on the terminal.

1. Connecting to Remote Host

First you need to connect to a remote host before doing any operations. You can use any one of the following methods to connect to a remote host. First method is
> ftp remote-server-name
connected to remote-server-name

Once the ftp connects to the remote server name, it will prompt you to enter the user name and password. After successful login, your terminal or prompt changes to "ftp>".

Another method is to use the open option with ftp command. This is shown below:
ftp>open remote-server-name
connected to remote-server-name

If the ftp command fails to connect to the remote server, then you will get the below error:
ftp: connect: Connection refused

2. Copy file from remote machine to local machine.

The get option is used to download or transfer a file from the remote system to the local system.
ftp> get windows-cleveland.bat

This will download the specified file (windows-cleveland.bat) from the remote systems current directory.

3. Copying multiple files from remote machine to local machine.

You can use the get to transfer multiple files from the remote host to local host.
ftp>get *.png

This will download all the png images to the local machine.

4. Transferring file from local server to remote server

The put option is used to copy the file from the local host to the remote host.
ftp>put linux-virtual-server.rpm

This command puts the rpm file into the remote machine.

5. Transferring multiple files to the remote server.

You can use the put option to transfer more than one file from local system to the remote system.
ftp>put *.rpm

6. Executing commands in remote machine.

After connecting to the remote network machine using the ftp, you can run commands like ls to list the files, cd to change directory and many more.
ftp> ls

This will list the files and directories in the remote machines current directory.

7. Executing commands in local machine.

Once you have connected to the remote host, to run the commands on local machine you need to exit from the ftp connection. Instead of this, there is a way to run commands on local host without exiting from the ftp connection. Use the ! Symbol before the command you want to run.
ftp> !ls

Now this will list the files in the local machines current directory.

8. Changing the file transferring mode.

You can change the file transfer modes to ascii and binary modes. Use the below commands to change the mode.

9. Deleting files on remote machine

You can use the delete or mdelete to remove a single file or multiple files in the remote machine.
ftp>delete linux-dedicated-server.dat
ftp>mdelete *.dat

10. Disconnecting from ftp connection.

Use the quit command to close the ftp connection.

11. Using FTP command in batch scripts

The following script reads the instructions from the dat file and executes them on the remote machine.
echo "Ftp command batch script"
echo "start"
ftp -s:instructions.dat remote-host
echo "End"

The contents of the instructions.dat file is
cd /var/tmp
put oracle_storage.exe

12. Getting the help about ftp command.

To know more about the ftp command, just type the help on the prompt. It will display the options/commands that you can use with ftp command.
Commands may be abbreviated.  Commands are:

!       disconnect mdelete  preserve  runique
$       edit       mdir     progress  send
account exit       get     prompt    sendport
append  form       mkdir    proxy     site
ascii   ftp        mls      put       size
bell    get        mode     pwd       sndbuf
binary  gate       modtime  quit      status
bye     glob       more     quote     struct
case    hash       mput     rcvbuf    sunique
cd      help       msend    recv      system
cdup    idle       newer    reget     tenex
chmod   image      nlist    rename    trace
close   lcd        nmap     reset     type
cr      less       ntrans   restart   umask
debug   lpwd       open     rhelp     user
delete  ls         page     rmdir     verbose
dir     macdef     passive  rstatus   ?

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