How to nuke a FTP Server

in Categories Linux, Shell scripting, UNIX last updated August 13, 2006

You can nuke whole directory or sub-directory tree by using rm -rf command with -rf flags under UNIX or Linux. But ftp server does not gives rm -rf command. For ftp server you use the rmdir command to remove a directory (and rm for files). Depending on the remote server, you may be able to remove a non-empty directory.(most remote ftp server disables this option)

For example, consider my following ftp directory server structure (I do not have ssh access to this FTP box):


Now let us say I want remove all files and sub-directories under /vivek/ directory. There are least 100 subdirectories and deleting all files and directory manually will take lots of time.

To nuke a vivek/ directory, you need to use ncftpls command to obtain the list of all subdirectories:
$ ncftpls -u vivek -p mypassword


Junk/  mp3/ 02/09/ 03/09/   ...


  • -u vivek : FTP login username
  • -p mypassword : Ftp password
  • : Ftp server name ( followed by path (/vivek/).

Now you can store a list of all sub-directories in a shell variable called LIST. Type the following command at shell prompt:
$ LIST=$(ncftpls -u vivek -p mypassword
$ echo $LIST


Junk/  mp3/ 02/09/ 03/09/ ….

To remove all sub-directories from /vivek/ dir you can write a shell script as follows:
LIST="$(ncftpls -u vivek -p mypassword"
for dir in $LIST
ncftp -u"vivek" -p"password" <<EOF
cd $rdir
rm *
rmdir $rdir

How it works?

  1. ncftp ftp client login to my ftp server.
  2. Script will change directory to $rdir
  3. First, it will remove all files
  4. Next, it will remove subdirectory
  5. And ftp connection will terminated
  6. The entire cycle is repeated using a shell for loop construct.

You can obtain complete working and generic version here. You can use logic presented here to write a shell script for sftp server. You can modify this script rotate ftp backups and much more.

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.

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2 comment

  1. I’m not sure if this is unique to my setup… but I was able to use ncftp and do:

    rm -fr /unempty-ftp-dir/

    from the ftp command line.

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