Linux Lftp Client Tutorial For Ftp, Http, Sftp, Https, Ftps, Fish Potocols

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Lftp is a powerful command line tool which supports FTP, HTTP, SFTP, FISH, TORRENT protocols for file and data transfer. As we can see it supports popular data and file transfer protocols. It uses GNU TLS or OpenSSL for SSL/TLS encryption. In this tutorial we will look installing and different examples with lftp .

Install

lftp  is provided Linux distributions from official repositories. We can install it for yum  based distros like Fedora, RedHAT, CentOS with the following command.

another alternative is installing it into apt based distros like Debian, Ubuntu, Kali, Mint.

Syntax and Help

lftp provides very simple syntax. We can show syntax and help information with the -h option like below.

Syntax and Help
Syntax and Help

Configuration File

lftp tool have very detailed configuration file. This configuration file can be used for specify alias, ssl configuration, proxy configuration, anonymous password, etc. Default path and name of the configuration file is /etc/lftp.conf. We can print this configuration file like below. In order to edit this file we need root privileges.

Configuration File
Configuration File

Interactive Shell

lftp  also provides an interactive shell like FTP connections. We just need to issue the lftp  command where we will enter to the interactive shell.

Interactive Shell
Interactive Shell

Connect FTP

Now we can start the action. We will connect to an FTP server with the lftp  command. We just need to specify the protocol which is FTP in this case and the IP address or host name of the server. In this example we will connect to ftp.metu.edu.tr .

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Connect FTP
Connect FTP

Connect SFTP

Another supported protocol is SFTP. SFTP is very similar with the FTP protocol. But the S makes the SFTP secure which means the network traffic is encrytpted with SSL/TLS. Other things are the same with FTP. In this example we will connect using sftp:// of IP address 192.168.1.1 .

Disable SSL Certification Verification

There are a lot of configuration about lftp  . One of the most error prone configuration is SSL and SSL verification. As we know SSL certificates are approved by the authorities. But in some cases servers can use unapproved certificates. This will create following error.

In order to prevent this connection error we need to turn of the SSL certificate verify. Following configuration line will disable SSL verification. This configuration line can be put into global configuration file /etc/lftp.conf  or into user local configuration file ~/.lftp/rc

Proxy Configuration

In corporate environment proxy is popular connection technology. In this case we need to specify the proxy configuration to the lftp . We will set proxy configuration by using bash environment variables. We can set HTTP proxy like below. This line should be put into global configuration file /etc/lftp.conf  or user local configuration file /~/.lftp/rc .

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