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This article introduces the relevant knowledge of "how to build a FTP server with Shell scripts". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

All kinds of knowledge points are written in the notes.

All you need is sudo $PATH/ftpsetup.sh. By default, log in with test/test as the user name and password. The root directory after login is read-only, and the subdirectory writable is writable.

Test ok on Ubuntu 13 and Linux Mint 15.

The code is as follows:

#! / bin/bash

# by liuhx 2013-Nov-04.

# set up the script for the ftp environment. The root directory of ftp is read-only, and the writable directory under it is writable

# you can customize the following four items

# ftp user name

UserName= "test"

# ftp password

Password= "test"

# ftp root directory, do not add / at the end

Ftp_dir= "$HOME/ftp"

# the directory name of the writable directory

Writable= "writable"

# if no sudo is added, prompt for an error and exit

If ["x$ (id-u)"! = x0]; then

Echo "Error: please run this script with 'sudo'."

Exit 1

Fi

# Core tool, vsftpd. -y is to answer yes to all prompts

Sudo apt-get-y install vsftpd

# db-util is a tool used to generate a user list database

Sudo apt-get-y install db-util

# refer to https://help.ubuntu.com/community/vsftpd#The_workshop for the following steps

# create a database of usernames and passwords, and record usernames in odd numbers and passwords in even numbers

Cd / tmp

Printf "$userName\ n$password\ n" > vusers.txt

Db_load-T-t hash-f vusers.txt vsftpd-virtual-user.db

Sudo cp-f vsftpd-virtual-user.db / etc/

Cd / etc

Chmod 600 vsftpd-virtual-user.db

If [!-e vsftpd.conf.old]; then

Sudo cp-f vsftpd.conf vsftpd.conf.old

Fi

# create a PAM file. Here-document of bash, and directly output these contents to overwrite the original file.

(sudo cat vsftpd.conf

# Virtual users need to be mapped as local users and set as themselves to avoid permission problems, but also make themselves unwritable to the ftp root directory

Sudo echo "guest_username=$owner" > > vsftpd.conf

# set that each virtual user can only browse its root and subdirectory (otherwise you can access the disk root directory)

# this will require the root directory to be unwritable, so create a subdirectory of writable

Mkdir "$ftp_dir"

Mkdir "$ftp_dir/$writable"

Sudo chmod Amurw "$ftp_dir"

Sudo chown-R $owner:$owner $ftp_dir

Sudo / etc/init.d/vsftpd restart

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