Installation and management of linuxFTP server-Linux Enterprise Application-Linux server application information. The following is a detailed description. Note:
Due to the time relationship, no detailed description is provided. For more information, see wu-ftp FAQ and ftpd and ftpaccess.
Man ftpd ).
1. ftp Server
1. inetd configuration file or xinetd. conf configuration file
The content of the/etc/inetd. conf file is as follows:
Ftp stream tcp nowait root/usr/sbin/tcpd in. ftpd-l-
The content of the/etc/xinetd. conf file is as follows:
Service ftp
{
Socket_type = stream
Protocol = tcp
Wait = no
User = root
# Only_from = 202.118.66.0
# Only_from + = 192.168.1.2
# Only_from + = localhost
Server =/usr/sbin/in. ftpd
Server_args =-l-
}
Related Files:/etc/services
Ftp-data 20/tcp
Ftp 21/tcp
2. ftp user (required for Anonymous FTP Server)
File:/etc/passwd and/etc/shadow
Related commands: newaliases, create an email alias
Ii. File System Structure
1. Anonymous FTP directory structure
Sub-directories:
Bin (ls, gzip, tar, and other binary executable files used by anonymous ftp users)
Etc (passwd, group)
Lib (Dynamic Connection Library, ld-2.0.7.so, ld-linux.so.2, ldd ../bin/ls, etc)
Pub (downloadable files)
2. passwd and group files
Do not use the passwd and group files of the system. It is best to put only the user and group information needed.
Passwd file:
Ftpadm: x: 0: 0: Anonymous FTP:/home/ftp:/bin/false
Ftp: x: 60000: 60000: Anonymous FTP:/home/ftp:/bin/false
Group file:
Ftpadmin: x: 0:
Ftp: x: 60000:
3. file and directory attributes
Main directory/home/ftp master root, attribute 555
The bin owner is the root group, which has the following attributes: wheel or other: 111.
Etc.
Lib owner root, attribute 555
The pub owner is the root or ftp administrator, and the attribute is 555.
Do not use ftp as the owner of any files or directories!
[Hbwork @ helius/etc] $ cd/home/ftp/
[Hbwork @ helius ftp] $ ls-l
Total 4
D -- x 2 root 1024 Apr 8 bin
D -- x 2 root 1024 Jun 4 15:12 etc
Drwxr-xr-x 2 root 1024 Apr 8 lib
Dr-xr-sr-x 2 root ftp 1024 Apr 8 11: 18 Pu
$ Ls-l bin
[Root @ helius ftp] # ls-l bin/
Total 250
--- X -- x 1 root 15236 Apr 28 1998 compress
--- X -- x 1 root 46356 Sep 11 1998 cpio
--- X -- x 1 root 45436 Sep 11 1998 gzip
--- X -- x 1 root 29980 Sep 11 1998 ls
--- X -- x 1 root 110668 Sep 11 1998 tar
Lrwxrwxrwx 1 root 4 May 19 16:48 zcat-> gzip
$ Ls-l etc
Total 19
-R -- 1 root 57 Jun 4 15:12 group
-R -- 1 root 16372 Sep 11 1998 ld. so. cache
-R -- 1 root 83 Jun 4 15:12 passwd
(For more information about setting up anonymouse FTP on Solaris, see Wu-ftpd-faq)
Iii. Testing and debugging
Egrep ftp/etc/inetd. conf
Ps ax | egrep inetd
Kill-HUP $ PID
$ Ftp localhost (or ftp 0)
Execute commands such as ls cd get to check the result.
Iv. wu-ftpd FTP server process
Enhanced Functions:
You can set different classes based on the user's IP address or host and user name.
According to the set class, the administrator can control its access permissions, such as preventing anonymous Users
Delete or overwrite existing files
. Automatically executes uncompress, compress, tar, gzip, and other functions.
. Records all upload/download and each command sent by the ftp client.
. Allows smooth ftp server shutdown
Related configuration files:
Ftpaccess
Ftpconversions
Ftphosts
Ftpuser
Related commands:
Strings/usr/sbin/in. ftpd | egrep ftpaccess
$ Tar-zxvf wu-ftpd-2.5.0.tar.gz
$ Wu-ftpd-2.5.0 cd
We recommend that you refer to the INSTALL, README, upload. configuration. HOWTO file before compiling and installation.
To customize your own wu-ftpd, You can edit the src/pathnames. h file.
$ Build help
View compilation help
$./Build lnx
$ Su
#./Build install
2. command line options
-D Sends debugging information to syslog
-A Enable the use of the ftpaccess file (This is the default)
-A Disable the use of the ftpaccess file
-L Cause ftpd to log all USER commands.
-I Causes ftpd to log all incoming (upload) file in the xferlog
File (See pathnames. h)
-O Causes ftpd to log all outgoing (download) files in the xferlog file
3. File ftpconversions
Doc/examples/, used to specify the real-time compression or expansion (on-the-fly) for get ).
This file does not need to be modified unless otherwise
4. ftpaccess
(1) define a class
Three user types: real anonymous
Guest (provide the corresponding password)
Format:
Class classname type [, type,...] address [address...]
Example:
Class local real * .dlut.edu.cn 202.118.66 localhost
Class anonymous *
Loginfails 2
Tar no anonymous
Compress no anonymous
Chmod yes | no type [type...]
Delete yes | no type [type...]
Overwrite yes | no type [type...]
Rename yes | no type [type...]
Umask yes | no type [type...]
(5) banner
Information displayed before the User login
Banner/etc/ftpmsg/banner. msg
The following variables can be referenced in the banner. msg file:
% C Current working directory
% E Email address of the administrator (email ftpadm@dlut.edu.cn)
% F is available in the directory
% L hostname
% M maximum allowed connections
% N number of current connections in the same class
% R The client host 'name or ip address
% T Current local time
% U The name the user specified at login
Example file:
Welcome to this test FTP Archive, running on % L.
Please contact % E with any technical problems you may have
Accessing this archive.
You are currently user % N out of a maximum % M users. It's
% T in PRC.
(6) message command
Message pathname login
Message pathname cwd = dir
Message. conents cwd = *
The cwd = dir is displayed only when the directory is changed for the first time.
Maintenance:
It is best to use the relative path when establishing a connection.
Create subdirectories Based on the software category.
It is best to create a corresponding description file or index file in each directory for your convenience.
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.
