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proxy in linux

proxy for linux(centos/rhel)

Define the environment variables in /etc/environment file if you want to add a permanent proxy in the CentOS/RHEL 7.

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echo "all_proxy=http://proxy.example.com:3128/" > /etc/environment

For bash and sh users, add the export line given above into a new file called /etc/profile.d/http_proxy.sh file:

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echo "export all_proxy=http://proxy.example.com:3128/" > /etc/profile.d/http_proxy.sh

PS

Env Variable Desc e.g.
http_proxy 10.0.0.51:8080
http://10.0.0.51:8080
user:pass@10.0.0.10:8080
socks4://10.0.0.51:1080
socks5://192.168.1.1:1080
https_proxy ditto
ftp_proxy ditto
all_proxy if this variable is set, there is no need to set the above variables ditto
no_proxy .aiezu.com,10...,192.168..,*.local,localhost,127.0.0.1