Shulou(Shulou.com)06/01 Report--

This article will explain in detail how to use lftp under linux. The editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.

The function of lftp is more powerful, compared with the original use of ftp, a lot of convenience.

1. Log in:

Lftp ftp://yourname@site

Pwd:*

Or open ftp://yourname@site

2. Basic operation (transfer)

Introduction to use of lftp

Lftp is a powerful download tool that supports protocols for accessing files: ftp, ftps, http, https, hftp, fish. (where ftps and https need to include openssl libraries at compile time). Llftp's interface is very much like a shell: command completion, history, allowing multiple background tasks to execute and other functions, very easy to use. It also has bookmarks, queuing, mirroring, breakpoint continuation, multi-process download and other functions.

Command line syntax

To see the command line syntax of lftp, just type lftp-- help in shell

Lftp [OPTS]

'lftp' is the first command that lftp executes after the rc file is executed

-f exit after executing the command in the file

-c exit after executing the command

-- help exits after displaying help information

-- version exits after displaying lftp version

Other options are the same as the 'open' command

-e execute the command after selection

-u [,] authenticate with the specified username / password

-p connect to the specified port

Hostname, name of URL or bookmark

If you enter the site name on the command line, lftp will log in directly to the site, such as

$lftp ftp://.............

If you do not enter a site name on the command line, you must open it with the open command after entering the lftp interface

[yhj@ccse-yhj yhj] $lftp

Lftp: ~ > open ftp://...................

Common command

* download a single file and a group of files, and continue to use the-c parameter at the breakpoint.

Lftp.: / > get-c ls-lR.txt

Lftp.: / > mget. Txt

* Image (anti-image is uploaded) A directory, which can be mirrored by multiple threads in parallel (--parallel=N)

Lftp.: / > mirror incoming local_name

Lftp.: / > mirror-R local_name

Lftp.: / > mirror-parallel=3 incoming local_name

* Multithreaded download, similar to the function of network ants; the default is 5 threads

Lftp.: / > pget-n 4 ls-lR.txt

* background task management

By default, if you press Ctrl+z, the task you are executing will go to the background, or you can add a & symbol at the end of the command line to make the task execute in the background. You can view all background processes with the jobs command. You can queue up new tasks with the queue command. If you exit lftp and the task is executed in the background, the lftp will be transferred to background execution.

* other uses

Lftp supports pipe operations similar to bash, for example, you can save the size of all files in a specific directory (or the entire site) on the ftp server to the local file ls.txt with the following command

Lftp.: / > du incoming > ls.txt

Related documents

/ etc/lftp.conf

Global configuration file, the actual location depends on the system configuration file directory, either in / etc or / usr/local/etc

~ / .lftp / rc, ~ / .lftprc

The user profile will be executed after / etc/lftp.conf, so the settings in this will override the settings in / etc/lftp.conf.

Lftp does not display welcome messages and error messages from the ftp server by default, which is inconvenient in many cases, because you may want to know whether the server is not connected or the number of connections is full. If so, you can write a line in ~ / .lftprc

Debug 3

You can see the error message.

For more configuration options, please refer to the man manual or use the command set-an in the lftp interface.

~ / .lftp/log

When lftp is switched to background non-pending mode execution, the output will be redirected here

~ / .lftp/bookmarks

This is where lftp stores bookmarks. You can view the bookmark command by lftp.

~ / .lftp/cwd_history

This file is used to store the working directory of the visited site

~ / .lftprc

When using lftp to access some domestic ftp servers, the Chinese characters are often garbled.

Don't panic, this is due to the inconsistency between the server and the local code. We just need to create a new file ~ / .lftprc or ~ / .lftp/rc in the home directory.

And add the following to it:

Debug 3set ftp:charset GBKset file:charset UTF-8#set ftp:passtive-mode no#alias utf8 "set ftp:charset UTF-8" # alias gbk "set ftp:charset GBK"

Log in to the ftp server

Back to the point, let's take a look at how to log in to the ftp server.

Lftp ftp://user:password@site:port

Lftp user:password@site:port

Lftp site-p port-u user,password

Lftp site:port-u user,password

All of the above methods work well, but the passwords are all in clear text, so it doesn't seem to be safe. Never mind

Lftp user@site:port

The system will prompt for password, and the password will be echoed as *.

But it's troublesome to enter so much every time. It would be nice to have a site manager like leapftp. In fact, lftp has already figured it out for us: this is bookmark. We'll see later.

Common command

Run at the terminal

Man lftp

Or enter after logging in to ftp

Help

You can see the list of commands.

Let's take a look at the commands commonly used by lftp:

Ls

Displays a list of remote files (! ls displays a list of local files).

Cd

Switch the remote directory (lcd switch the local directory).

Get

Download the remote file.

Mget

Download remote files (you can use wildcards, that is, *).

Pget

Use multiple threads to download remote files, default to five.

Mirror

Download / upload (mirror-R) / synchronize the entire directory.

Put

Upload files.

Mput

Upload multiple files (wildcards are supported).

Mv

Move the remote file (renamed the remote file).

Rm

Delete the remote file.

Mrm

Delete multiple remote files (wildcards are supported).

Mkdir

Create a remote directory.

Rmdir

Delete the remote directory.

Pwd

Displays the current remote directory (lpwd displays the local directory).

Du

Calculate the size of the remote directory

!

Execute the command of the local shell (since lftp does not have lls, it can be replaced by! ls)

Lcd

Switch local directory

Lpwd

Show local directory

Alias

Define alias

Bookmark

Set bookmarks.

Exit

Exit ftp

Quick bookmark

Supplementary author: aBiNg

The bookmark command in ftp is to write the configuration to the ~ / .lftp / bookmarks file; we can modify this file directly to quickly log in to the ftp server.

3. Mirror synchronous image and backup server files

The main problem today is to solve the problem of how to back up server-side files. After understanding the use of the mirror instruction, I found it more suitable and easy to use.

Basic usage:

1) download server-side files:

# mirror-vn RCD LCD / / RCD is the remote path and LCD is the local path

2) upload files:

# mirror-R LCD RCD

A script for automatic synchronization is attached below:

#! bin/bash

Echo "script start at `date" + Y-%m-%d H:%M:%S "

HOST= "hostname"

USER= "yourname"

PASS= "password"

LCD= "LocalePath"

RCD= "RemotePath"

/ usr/sbin/lftp

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