Shulou(Shulou.com)06/02 Report--

Installation and use of ftp for Linux

Installation and configuration of FTP server (Ubuntu)

1. Query whether to install vsftpd: rpm-qa | grep vsftpd

(installation of rpm: apt-get install rpm)

Or query the current ftp process: ps-ef | grep vsftpd

two。 Install vsftpd server: rpm-ivh vsftpd-*.rpm or find the corresponding resources from the Internet to install vsftpd:apt-get install vsftpd directly

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You can install the package online by configuring yum.

[root@szmspv1 yum.repos.d] # pwd

/ etc/yum.repos.d

[root@szmspv1 yum.repos.d] # more rhel54.repo

[Server]

Name=Red Hat Enterprise Linux Server

Baseurl= ftp://172.26.0.11/Server64/

Enabled=1

Gpgcheck=1

Gpgkey= file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

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3. test

Root@localhost root:~# ftp localhost

Connected to localhost.

220 (vsFTPd 2.2.2)

Name (localhost:root): root

331 Please specify the password.

Password:

230 Login successful.

Remote system type is UNIX.

Using binary mode to transfer files.

Ftp > bye

221 Goodbye.

Start, stop, restart, status of 4.vsftpd server

Service vsftpd start or. / etc/init.d/vsftpd start

Service vsftpd stop or. / etc/init.d/vsftpd stop

Service vsftpd restart or. / etc/init.d/vsftpd restart

Service vsftpd status or. / etc/init.d/vsftpd status

Three main configuration files for 5.vsftpd

/ etc/vsftpd.conf / / main configuration file for the server

/ etc/ftpd.ftpusers / / users in this file cannot access the vsftpd server

/ etc/vsftpd.user_list / / access may be denied, service yelled or access allowed

Configuration parameters of 6.vsftpd.conf

Anonymous_enable=YES / / enable anonymous users

Local_enable=YES / / allow local users to access the vsftpd server

Write_enable=YES / / allow upload

Download_enable=YES / / allow download

Anon_upload_enable=YES / / allow anonymous users to upload

Anon_mkdir_write_enable=YES / / allows anonymous users to create directories and upload

Anon_other_write_enable=NO / / Anonymous users are not allowed to delete and rename

Local_max_rate=20000 / / the maximum transfer rate of the local user in bytes per second

Maximum transfer rate of anon_max_rate=5000 / / anonymous users in bytes per second

Local_umask=022 / / remove write permission

File_open_mode=0666 / / permission to upload files

Xferlog_enable=YES / / maintain log files and record upload and download operations in detail

Xferlog_std_format=YES / / transfer log files will be written in standard xferlog format. Log files are default.

Think / var/log/xferlog

Hide_ids=YES / / hide folder and directory owners

Port_enable=YES / / active transfer mode is allowed

Pasv_min_port= (1024 > / etc/vsftpd.user_list)

Phenomenon 3:

500 OOPS: cannot open chroot () user list file

Login failed.

Reason: the file "/ etc/vsftpd.chroot_list" does not exist

Solution: # echo username > > / etc/vsftpd.chroot_list

Phenomenon 4:

500 OOPS: missing value in config file

Connection closed by remote host.

Reason: there is a problem with the value before the "=" equal sign, or there is only one space.

Solution: just modify the corresponding value, and maybe go through diff to compare and find.

Phenomenon 5:

500 OOPS: bad bool value in config file

Connection closed by remote host.

Reason: there is a problem with the value after the "=" equal sign

Solution: confirm the modification after the "=" equal sign

Phenomenon 6:

500 OOPS: unrecognised variable in config file

Connection closed by remote host.

Reason: there is a space before the parameter

Solution: delete the space before the parameter

Phenomenon 7.

Confirm that "local_enable=YES" exists, but local users cannot log in

Reason: verification parameter was mistakenly deleted

Solution: add "pam_service_name=vsftpd"

Phenomenon 8.

500 OOPS: chdir

500 OOPS: child died

Connection closed by remote host.

Reason: the user's home directory has no permissions or no home directory

Solution: set the user's home directory permissions correctly

Steps for setting up 9.vsftpd virtual user account

(1)。 Create a virtual user password library file

Vi / pub/vu_list.txt

Wang5

one hundred and twenty three

Zhao6

four hundred and fifty six

(2)。 Generate the authentication file of vsftpd

Db_load-T-t hash-f / pub/vu_list.txt / etc/vsftpd/vu_list.db

Chmod 600 / etc/vsftpd/vu_list.db

(3)。 Create PAM profiles required by virtual users

Vi / etc/pam.d/vsftpd.vu

Auth required / lib/security/pam_userdb.so db=/etc/vsftpd/vu_list

Account required / lib/security/pam_userdb.so db=/etc/vsftpd/vu_list

(4)。 Establish the directory to be accessed by the virtual user and set the appropriate permissions

Useradd ftpuser

(5)。 Set up the vsftpd.conf profile

Guest_username=ftpuser

Pam_service_name=vsftpd.vu

(6)。 Restart the vsftpd server

Service vsftpd restart

10. Set different permissions for virtual users

(1)。 Set up the vsftpd.conf file

User_config_dir=/etc/vsftpd_vu

(2)。 Create a directory

Mkdir / etc/vsftpd_vu

(3)。 Enter the directory for editing

Cd / etc/vsftpd_vu

Vi wang5

Anon_world_readable_only=NO

Anon_upload_enable=YES

Anon_mkdir_write_enable=YES

Anon_other_write_enable=YES

Vi zhao6

Anon_world_readable_only=YES

Anon_upload_enable=NO

Anon_mkdir_write_enable=NO

Anon_other_write_enable=NO

10. Configure a virtual ftp server based on IP

(1)。 Bind other IP

Ifconfig eth0:0 192.168.1.71

(2)。 Create a virtual FTP server directory

Mkdir-p / var/ftp2/pub1

(3)。 Local users mapped by anonymous users who create virtual servers

Ftp2

Useradd-d / var/ftp2-M ftp2

(4)。 Modify the configuration file of the original stand-alone server

Listen_address=192.168.1.70

(5)。 Copy the master configuration file that generates the virtual server

Cp / etc/vsftpd.conf / etc/vsftpd/vsftpd2.conf

(6)。 Set the IP of the virtual server and map the anonymous user of the virtual server to the local user ftp2

Vi / etc/vsftpd/vsftpd2.conf

Pam_service_name=vsftpd

Listen_address=192.168.1.71

Ftp_username=ftp2

(7)。 Restart service takes effect: service vsftpd restart

Use the ftp command under DOS:

1. Switch to the specified directory

two。 Connect to the target ftp server: ftp 10.137.97.29

3. Enter account number and password

4. Switch transmission mode, binary transmission uses bin command

5. Upload file: put test_setup.zip

Download file: get * * .zip

6. Exit ftp:bye

7. Cd changes directories

8. Del deletes files

9. Dir to view the current directory of the remote host

10. Ascii uses ascii to transfer files

11. Mput, mget: upload or download multiple files

12. Mkdir sets up a directory on the remote host

13. Pwd displays the current working directory path of the remote host

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