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Yum is called as (Yellow Update Manager) which helps you r packages and kernel source up-to-date as available in you repository sources. But I recommend you to go with manual update insted of automatic becoz manual update your are sure what packages are group you like to update and depends on your need you can update the Packages.<br />
So using yum for update depends on individual purpose of using Linux in their environments, so to be specific each end user will be having their own set of procedure in using yum.
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Yum is called as (Yellow Update Manager) which helps you r packages and kernel source up-to-date as available in you repository sources. But I recommend you to go with manual update insted of automatic becoz manual update your are sure what packages are group you like to update and depends on your need you can update the Packages.
So using yum for update depends on individual purpose of using Linux in their environments, so to be specific each end user will be having their own set of procedure in using yum.

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&gt; Yum is called as (Yellow Update Manager)<br />
Rather Yellowdog ....<br />
<br />
If Your distro supports yum - use it. <br />
&gt;&nbsp;is it recommended to do it once a week or once a month?<br />
Daily? As often as You can.<br />
<br />
kosarajudeepak is right, I prefer manula update as well.<br />
I just run from dail cron: yum update 2&gt;/dev/null 
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> Yum is called as (Yellow Update Manager)
Rather Yellowdog ....

If Your distro supports yum - use it.
> is it recommended to do it once a week or once a month?
Daily? As often as You can.

kosarajudeepak is right, I prefer manula update as well.
I just run from dail cron: yum update 2>/dev/null

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Hello there,<br />
I would like to know if using (yum update) is good to keep your system up to date..<br />
is it recommended to do it once a week or once a month? what do you guys recommend?<br />
thanks
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Hello there,
I would like to know if using (yum update) is good to keep your system up to date..
is it recommended to do it once a week or once a month? what do you guys recommend?
thanks

using yum update

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.

Linux

Unix is a multitasking, multi-user computer operating system originally developed in 1969 at Bell Labs. Today, it is a modern OS with many commercial flavors and licensees, including FreeBSD, Hewlett-Packard’s UX, IBM AIX and Apple Mac OS-X. Apart from its command-line interface, most UNIX variations support the standardized X Window System for GUIs, with the exception of the Mac OS, which uses a proprietary system.