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All posts in RHCE

RHCE – Network teaming or bonding

In CentOS 7 it’s possible to configure to separate network interfaces to work together. Combining two network interfaces like this is referred to as ‘Link Aggregation’. Link aggregations has the following benefits: combined bandwith – This means improved performance, better performance load balancing – So that one interface doesn’t do . . . Read more

RHCE – Network Teaming

Link Aggregation In RHEL/CentOS it is possible to combine two (physical or virtual) network interfaces so that they act as one. Having 2 network interfaces acting as one is referred to as link aggregation. There’s 2 advantages to setting up link aggregations: Improved redundancy – i.e. one interface is active, and . . . Read more

RHCE – The getent command

The getent command essentially queries a collection of sources to return a comprehensive list. $ get passwd root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin adm:x:3:4:adm:/var/adm:/sbin/nologin lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin sync:x:5:0:sync:/sbin:/bin/sync shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown halt:x:7:0:halt:/sbin:/sbin/halt mail:x:8:12:mail:/var/spool/mail:/sbin/nologin operator:x:11:0:operator:/root:/sbin/nologin games:x:12:100:games:/usr/games:/sbin/nologin ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin nobody:x:99:99:Nobody:/:/sbin/nologin systemd-bus-proxy:x:999:998:systemd Bus Proxy:/:/sbin/nologin systemd-network:x:998:997:systemd Network Management:/:/sbin/nologin dbus:x:81:81:System message bus:/:/sbin/nologin polkitd:x:997:996:User for polkitd:/:/sbin/nologin sssd:x:996:995:User for sssd:/:/sbin/nologin abrt:x:173:173::/etc/abrt:/sbin/nologin . . …etc . . . Read more

RHCE – Set up an NFS server

If you have directories on your machine that you want to share out to other machines so that they can access these folders as well (via a network connection), then one way to to do is by setting up nfs on your machine. To do this, you first need to . . . Read more

RHCE – Set up a CIFS Server

CIFS is a system that’s designed to let you share folders over the internet between machines. It is cross platform, i.e. you can share a Microsoft windows folder with a Linux machine. First you need to install: $ yum install -y samba This package installs a few dependent rpms. One . . . Read more