Overview :
In Linux Like operating system , we have the variables like http_proxy,ftp_proxy and https_proxy through which we can access the Internet via proxy on linux console.
All of the above mentioned variables are can be used with tools like elinks , wget , lynx , rsync and others.
I am assuming Linux servers that are behind the proxy servers and can get the Internet connection only via proxy settings.
Proxy Setting commands on Linux Command Line :
Example:1 Access http base sites via proxy , use below variable
Syntax : # export http_proxy=http://<proxy-server-ip-or-dns-name>:<Port-Number>
# export http_proxy=http://proxy.nextstep4it.com:8080
Example:2 Password Protect Proxy Settings
Syntax # export http_proxy=http://USERNAME:PASSWORD@<proxy-server-ip-or-dns-name>:PORT
# export http_proxy=http://nsit:*****@proxy.nextstep4it.com:8080/
Using Above Command we have set the proxy setting along with user name and password.
Example:3 To access secure sites(https) via proxy , set below variable
Syntax # export https_proxy=http://<proxy-server-ip-or-dns-name>:<Port-Number>
# export https_proxy=http://proxy.nextstep4it.com:8080/
Example:4 To access ftp based sites via Proxy , set the below variable
Syntax # export ftp_proxy=http://<proxy-server-ip-or-dns-name>:<Port-Number>
# export ftp_proxy=http://proxy.nextstep4it.com:8080/
Note : As these variables are declared for the particular session , to set it permanently , define these variables in the file
# vi /etc/bash.bashrc export http_proxy=http://proxy.nextstep4it.com:8080/ export ftp_proxy=http://proxy.nextstep4it.com:8080/ https_proxy=http://proxy.nextstep4it.com:8080/
Example:5 Proxy Settings in APT on Ubuntu Linux
# vi /etc/apt/apt.conf Acquire::http::Proxy "http://<proxy-server-ip-or-dns-name>:<Port-Number>";
Example:6 Proxy Settings for RSYNC
Syntax # export RSYNC_PROXY="http://<proxy-server-ip-or-dns-name>:<Port-Number>”
# export RSYNC_PROXY="http://proxy.nextstep4it.com:8080”
