Author: elijah

install Unison on Centos7

Posted on August 12, 2016 - March 7, 2017 by elijah

Starting with CentOS version 7, we need to install Unison from source:

yum install ocaml ocaml-camlp4-devel ctags ctags-etagswget https://www.seas.upenn.edu/~bcpierce/unison/download/releases/stable/unison-2.48.4.tar.gz
cd src/
make
cp -v unison /usr/local/sbin/

Unison project home page: www.cis.upenn.edu/~bcpierce/unison/download/releases/stable/unison-manual.html

Posted in Centos7, installs

add a new IP address to a Centos7 server without network restart

Posted on August 1, 2016 - March 7, 2017 by elijah

Here’s how to add a secondary IP address to an existing network interface of a CentOS7 server. Don’t forget the config files — this won’t survive a reboot.

ip addr add 172.26.7.80/24 brd 172.26.7.255 dev team1
ip addr show team1

ip rule add from 172.26.7.80/32 table rt1
ip rule show

If you gotta roll it back:

ip addr del 172.26.7.80/24 dev team1
ip rule del from 172.26.7.80/32 table rt1

Posted in Centos7, networking, server configs

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