December 2018
Beginner
826 pages
22h 54m
English
Content preview from Linux Administration Cookbook
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Getting ready
In this section, we're going to use our CentOS VM, mostly because Postfix is installed by default on CentOS boxes.
Log on to your CentOS box and make sure that Postfix is running:
$ vagrant ssh centos1$ systemctl status postfix● postfix.service - Postfix Mail Transport Agent Loaded: loaded (/usr/lib/systemd/system/postfix.service; enabled; vendor preset: disabled) Active: active (running) since Sun 2018-12-02 11:35:12 UTC; 21h ago Main PID: 1125 (master) CGroup: /system.slice/postfix.service ├─ 1125 /usr/libexec/postfix/master -w ├─ 1129 qmgr -l -t unix -u └─10453 pickup -l -t unix -u
If it's not installed and not running, you can simply install the postfix package:
$ sudo yum install postfix -y
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.