The ifconfig and netstat utilities has been marked as deprecated in the man pages for CentOS 5 and 6 for nearly a decade.  Redhat made the decision to no longer install the net-utils package by default in CentOS 7. The …

net-utils package deprecated ss and ip is the replacement commands for RHEL / CentOS / Fedora 7 Read more »

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If your system is behind a ISA proxy you need to do the following to get yum to work properly. Step one: Download the cntlm rpm package For 64 Bit CentOS 6.x ftp://rpmfind.net/linux/epel/6/x86_64/cntlm-0.35.1-4.el6.x86_64.rpm For 32 Bit CentOS 6.x ftp://rpmfind.net/linux/epel/6/i386/cntlm-0.35.1-4.el6.i686.rpm Step …

how to use yum through ISA proxy using Active Directory account Read more »

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Command: hostname explained I have seen a lot of people telling people to use the command hostname to get FQDN but almost none that have explained to junior people what the command actually does more than hostname -f. So I …

hostname command explained Read more »

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This is a Junior Linux System Administrator how-to describing how you use nmap to scan for live devices within a network. Use nmap to scan alive hosts in the network range with the command: nmap -sP subnet/netmask [c-johsor@sesstl168 ~]$ nmap …

How to use nmap to scan the network for live hosts CentOS/RHEL Read more »

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If you like to check if there is updates and what packages that you are able to get updates of you should use the command: sudo yum check-update [c-johsor@sesstl168 ~]$ yum check-update Loaded plugins: fastestmirror, refresh-packagekit, security Determining fastest mirrors …

Yum command: check-update before updating CentOS/RHEL Read more »

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