Category Archives: Linux

Setup Proxy in SUSE/VCSA

To setup proxy manually in VCSA 5.5 login as root and look into the following file:

/etc/sysconfig/proxy

PROXY_ENABLED=”yes”

HTTP_PROXY=”http://<IP address or FQDN>:<port_number>”

HTTPS_PROXY=”http://<IP address or FQDN>:<port_number>”

FTP_PROXY=”http://<IP address or FQDN>:<port_number>”

NO_PROXY=”localhost, 127.0.0.1″

 

If you need to authenticate via proxy

Create a file in your home directory,

/root/.curlrc with permissions 644

and contain the following:

# Proxy credentials

proxy-user = “<username>:<password>”

source the file to apply the changes

source /root/.curlrc

 

Modify Ubuntu ens network interface card to eth0

  1. Display current interface cards and verify that eth0 doesnt exist:
    ifconfig -a
  2. Edit grub file configuration to disable new naming convention
    vim /etc/default/grub
  3. Look for GRUB_CMDLINE_LINUX= include the following net.ifnames=0 biosdevname=0″
    From:
    GRUB_CMDLINE_LINUX=””
    To
    GRUB_CMDLINE_LINUX=”net.ifnames=0 biosdevname=0″
  4. Save and exit the file
  5. Reload grub config file:
    update-grub
  6. Edit interfaces file
    vim /etc/network/interfaces
    From:
    # The primary network interface
    auto ens16
    iface ens16 inet dhcpTo:
    # The primary network interface
    auto eth0
    iface eth0 inet dhcp
  7. Reboot your machine/Restart networking service

 

Reference:
https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/

Proxy in Ubuntu

There are two ways of configuring proxy in Ubuntu:

1. Using GUI:

  1. click Unity Launcher and type in “Network”.
  2. Select application and navigate to “Network Proxy “tab on the left hand side.
  3. Select “Manual” for “Method” and specify your proxy address.

2. Using /etc/environment file which is responsible for system-wide environment variables that are available to all processes. e.x:
http_proxy="http://fully_qualified_domain_name:port_number"
https_proxy="https://fully_qualified_domain_name:port_number"
ftp_proxy="ftp://fully_qualified_domain_name:port_number"
socks_proxy="socks://fully_qualified_domain_name:port_number"

apt-get 

To configure apt-get proxy edit configuration file:
vim /etc/apt/apt-conf
and include the following:
Acquire::http::Proxy "http://fully_qualified_domain_name:port_number"