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[translated] 20150306 How to Setup lftp--A Simple Command line FTP Program.md
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How to Setup lftp - A Simple Command line FTP Program
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================================================================================
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Hi everyone, this article is about Lftp and how we can install Lftp in our Linux Operating System. [Lftp][1] is a command line based File Transfer Software also known as FTP Client which was developed by Alexander Lukyanov and was distributed as GNU General Public License. Besides FTP, it also supports FTPS, HTTP, HTTPS, HFTP, FISH, and SFTP. The program also supports FXP, allowing for data transfers between two FTP servers bypassing the client machine.
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It has some awesome advanced features such as recursively mirroring entire directory trees and resuming downloads. Transfers can be scheduled for execution at a later time, bandwidth can be throttled, transfer queues can be created, and Unix shell-like job control is supported. The client can also be used interactively or automated with scripts.
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### Installing Lftp ###
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Before we try to run lftp, we have make sure that it is properly installed in our Linux Distribution. Here are some commands mentioned for installing lftp in the list common distribution of Linux.
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**On Ubuntu 14.04 LTS**
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In Ubuntu 14.04 LTS and its derivatives, we can install lftp using apt manager. So, to install it, we'll need to run the following commands in a shell or a terminal under sudo privilege.
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$ sudo apt-get install lftp
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**On CentOS/Fedora/RHEL**
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As lftp is also available in the repository of Fedora, CentOS and RHEL, we can use **yum** manager to install it.
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$ sudo yum install lftp
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**On Arch Linux**
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It is also available in Arch Linux Package Repository so, we can simply use pacman to install it.
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$ sudo pacman -S lftp
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**On OpenSuse**
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Zypper, package management software for OpenSuse can be used to install lftp. Here is the command with which one can install it on their OpenSuse machine.
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$ sudo zypper install lftp
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### Logging in ###
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To login to a ftp server or sftp server, we'll first need to know about the required credential for the login like username, password, ports.
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After that, we'll want to login using lftp client as basic usage.
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$ lftp ftp://linoxide@localhost
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If we need to point a port to the login then, we'll need to add port as shown below.
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$ lftp ftp://linoxide@localhost:21
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### Navigation ###
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We can use **ls** to list files and directories, **cd** to enter into a directory.
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### Uploading and Download Files ###
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We can use **pget** for downloading files from the remote server.
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> pget linspeed.svg
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We can use **put** for uploading files to the remote server.
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> put linoxide.tar
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To resume partially downloaded files/directories, we will use the -c switch:
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> mirror -c Directory
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>pget -c linoxide.tar
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> put -c upload.tar
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### Using Mirror ###
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We can use mirror to download the whole directory pointed as the source.
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> mirror remote local
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There is also reverse mirror (mirror -R) which uploads or updates a directory tree on server.
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> mirror -R local remote
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To resume partially downloaded files/directories, we will use the -c switch:
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> mirror -c Directory
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### To Queue Items to Download ###
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We can use queue option with lftp so that we can download selected files in a queue one by one as there is an option in GUI based clients to select and download in a queue. Here's an example on it.
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To prevent queue from auto transferring while you add to it :
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> queue stop
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Now, we'll add them into queue.
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> queue mirror "directory"
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> queue pget "file.tar"
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After the queue has been added, we should run queue start command.
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> queue start
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To remove the entire queue run the following command.
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> queue -d
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### Segmented Downloading ###
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Here, in this example we are segmenting files into 3 segments, one can change it according to their own need.
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A pget command using segmentation is **pget -n 3 file.tar**, where 3 is the number of segments.
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> pget -n 3 file.tar
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A mirror command using segmentation is **mirror --use-pget-n=3 directory**, where 3 is the number of segments.
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> mirror --use-pget-n=3 linxoxide
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We can use jobs -v to see the speeds of the individual segments as well as the total speed.
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### To Stop, Resume or Kill a Transfer ###
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To cancel a transfer we can press Ctrl+c . And to resume a download we can use the -c (--continue) switch as shown below.
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> mirror -c directory
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And to kill an active transfer we should run **kill** and to kill and delete all we'll need to run **kill all** as shown below.
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> kill
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> kill all
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### Exiting ###
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To quit from lftp, we should run exit command in the terminal or inside lftp interface.
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> exit
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### Conclusion ###
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Hurray! We have successfully installed lftp and learned some basic major ways to use it. lftp is an awesome command line ftp client which supports a lot of additional functionality and cool features. It has a lot stuffs more than the other common ftp client. So, if you have any questions, suggestions, feedback please write them in the comment box below. Thank you ! Enjoy lftp :-)
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--------------------------------------------------------------------------------
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via: http://linoxide.com/linux-how-to/setup-lftp-command-line-ftp/
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作者：[Arun Pyasi][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
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[a]:http://linoxide.com/author/arunp/
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[1]:http://lftp.yar.ru/
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@ -0,0 +1,174 @@
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如何设置lftp - 一个简易的命令行FTP程序
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================================================================================
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大家好，这篇文章是介绍Lftp以及如何在Linux操作系统下安装的。[Lftp][1]是一个基于命令行的文件传输软件也被称为FTP客户端，由Alexander Lukyanov开发并以GNU GPL协议许可发行。除了FTP，它还支持FTPS，HTTP，HTTPS，HFTP，FISH，以及SFTP。这个程序还支持FXP，允许数据绕过客户端直接在两个FTP服务器之间传输。
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他有很多很棒的高级功能，比如完整目录树递归镜像以及断点续传下载。传输任务可以安排在稍后的时间段执行，可以限制带宽，可以创建传输列表，还支持类似Unix shell的任务控制。客户端还可以在交互式或自动脚本里使用。
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### 安装Lftp ###
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在运行lftp之前，我们需要确定它已经正确安装在我们的Linux发行版中了。下面是在常见Linux发行版中安装lftp的一些命令。
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**Ubuntu 14.04 LTS**
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在Ubuntu 14.04 LTS以及它的衍生版中，我们可以通过apt管理程序安装lftp。要安装它，我们需要使用sudo权限在shell或终端里运行下面的命令。
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$ sudo apt-get install lftp
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**CentOS/Fedora/RHEL**
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因为在Fedora，CentOS和RHEL的软件仓库里也能找到lftp，我们可以用**yum**管理程序来安装它。
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$ sudo yum install lftp
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**Arch Linux**
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在Arch Linux安装包仓库里也有，我们可以简单地使用pacman来安装它。
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$ sudo pacman -S lftp
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**OpenSuse**
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OpenSuse系统里的包管理软件Zypper可以用来安装lftp。下面是在OpenSuse机器上用来安装的命令。
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$ sudo zypper install lftp
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### 登录 ###
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要登录到ftp服务器或sftp服务器，我们首先需要知道所要求的认证信息，比如用户名，密码，端口。
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之后，我们想通过lftp来登录。
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$ lftp ftp://linoxide@localhost
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如果需要指定登录端口，我们可以按下面的方式加上去。
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$ lftp ftp://linoxide@localhost:21
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### 浏览 ###
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我们可以用**ls**命令来列出文件和目录，用**cd**命令打开目录。
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### 上传和下载文件 ###
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我们可以用**pget**命令来从远端服务器下载文件。
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> pget linspeed.svg
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我们可以用**put**命令来上传文件到远端服务器。
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> put linoxide.tar
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要恢复之前只下载了一部分的文件/目录，我们可以用-c开关：
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> mirror -c Directory
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>pget -c linoxide.tar
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> put -c upload.tar
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### 使用镜像命令 ###
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我们可以用mirror命令来下载所指定的整个目录。
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> mirror remote local
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还可以做反向镜像(mirror -R)，可以用来上传或更新本地目录树到服务器上。
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> mirror -R local remote
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要恢复之前下载了一部分的文件/目录，我们可以用-c开关：
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> mirror -c Directory
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### 下载队列 ###
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我们可以在lftp里使用queue的选项，这样我们可以像基于GUI的客户端那样挨个下载队列里选择的文件。下面举个例子。
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为了避免队列自动开始传输，我们可以这样做：
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> queue stop
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现在，我们添加任务到队列。
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> queue mirror "directory"
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> queue pget "file.tar"
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在建立好队列后，我们再运行queue start命令。
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> queue start
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可以运行下面的命令移除整个队列。
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> queue -d
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### 分块下载 ###
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下面是一个把一个文件分成3块来下载的例子，你可以根据自己的需要调整。
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使用pget命令分块功能的方式是**pget -n 3 file.tar**，里面的3是分块的数目。
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> pget -n 3 file.tar
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使用mirror命令分块功能的方式是**mirror --use-pget-n=3 directory**，里面的3是分块的数目。
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> mirror --use-pget-n=3 linxoxide
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我们可以用jobs -v命令来查看每个独立分块的下载速度以及整体速度。
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### 停止，继续或删除一次传输任务 ###
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要取消传输我们可以按下Ctrl+C。而要恢复下载我们可以像下面那样使用-c (--continue)开关。
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> mirror -c directory
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要删除一次正在正在传输的任务我们可以用**kill**命令，而要删除所有任务我们可以使用下面那样的**kill all**命令。
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> kill
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> kill all
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### 退出 ###
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要从lftp退出，我们需要在终端或lftp交互接口中运行exit命令。
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> exit
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### 总结 ###
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哇！我们已经成功地安装了lftp并学会了使用它的一些基础的主要方式。lftp是一个非常棒的命令行ftp客户端，它支持许多额外的功能以及很酷的特性。它比其他普通ftp客户端多了很多东西。好吧，你要是有任何问题，建议，反馈，请在下面的评论区里留言。谢谢！享用lftp吧 :-)
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--------------------------------------------------------------------------------
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via: http://linoxide.com/linux-how-to/setup-lftp-command-line-ftp/
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作者：[Arun Pyasi][a]
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译者：[zpl1025](https://github.com/zpl1025)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
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[a]:http://linoxide.com/author/arunp/
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[1]:http://lftp.yar.ru/
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