Introduction to FTP
FTP is the English abbreviation of File Transfer Protocol , and the Chinese abbreviation is "Text Transfer Protocol". For bidirectional transfer of control files over the Internet . At the same time, it is also an application (Application). There are different FTP applications based on different operating systems, and all of them follow the same protocol to transfer files. In the use of FTP, users often encounter two concepts: "Download" and "Upload". "Downloading" a file means copying a file from a remote host to your own computer; "uploading" a file means copying a file from your own computer to a remote host. In Internet language, a user can upload (download) files to (from) a remote host through a client program.
The main function of FTP is to allow users to connect to a remote computer (the FTP server program is running on these computers), view the files in the remote computer, and then copy the files from the remote computer to the local computer, or transfer the files of the local computer to the remote computer. computer.
Small companies use FTP more, but large companies do not use FTP because it is not secure.
Use vsftpd to build ftp service
yum install -y vsftpd
useradd -s /sbin/nologin virftp vim /etc/vsftpd/vsftpd_login //The content is as follows, the odd number is the username, the even number is the password, multiple users write multiple lines
testuser1
aminglinux
chmod 600 /etc/vsftpd/vsftpd_login
db_load -T -t hash -f /etc/vsftpd/vsftpd_login /etc/vsftpd/vsftpd_login.db
mkdir /etc/vsftpd/vsftpd_user_conf
cd /etc/vsftpd/vsftpd_user_conf
mkdir /home/virftp/testuser1
touch /home/virftp/testuser1/aming.txt
chown -R virftp:virftp /home/virftp
vim /etc/pam.d/vsftpd //Add at the top
auth sufficient /lib64/security/pam_userdb.so db=/etc/vsftpd/vsftpd_login
account sufficient /lib64/security/pam_userdb.so db=/etc/vsftpd/vsftpd_login
vim /etc/vsftpd/vsftpd.conf
Change anonymous_enable=YES to anonymous_enable=NO
Change #anon_upload_enable=YES to anon_upload_enable=NO
将#anon_mkdir_write_enable=YES 改为 anon_mkdir_write_enable=NO
Add the following
chroot_local_user=YES
guest_enable=YES
guest_username=virftp
virtual_use_local_privs=YES
user_config_dir=/etc/vsftpd/vsftpd_user_conf
allow_writeable_chroot=YES
systemctl start vsftpd //Start vsftpd service
xshell uses xftp to transfer files
download xftp
Log in to a terminal and use Ctrl+Alt+F to bring up xftp
Use pure-ftpd to build ftp service
yum install -y epel-release
yum install -y pure-ftpd
vim /etc/pure-ftpd/pure-ftpd.conf//Find the line pureftpd.pdb and delete the # at the beginning of the line
systemctl stop vsftpd
systemctl start pure-ftpd mkdir /data/ftp
useradd -u 1010 pure-ftp
chown -R pure-ftp:pure-ftp /data/ftp
pure-pw useradd ftp_usera -u pure-ftp -d /data/ftp
pure-pw mkdb
pure-pw list/userdel/usermod/passwd
