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Upgrade Cisco IOS in a Router or a Switch

Feb 092008

upgrading IOS on Cisco routers and switches is hightly recommendable because of the following reasons

Patch critical vulnerabilities: Just like any other network device or application, Cisco routers and switches are also prone to security holes. And because routers and switches are critical to network infrastructure, you should plug these security holes as soon as possible.

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Howto make partition changes visible to the kernel without reboot

General 6 Responses »

Nov 112007

Many system administrators may be in the habit of re-booting their systems to make partition changes visible to the kernel. With Linux, this is not usually necessary. The partprobe command, from the parted package, informs the kernel about changes to partitions.

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Restart Debian/Ubuntu Linux Gnome session without rebooting

General 1 Response »

Feb 012007

If you want to quickly restart X Windows on Ubuntu or any version of linux, all you have to do is hit this key combination quickly or use the command line option
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Local DNS Cache for Faster Browsing on Ubuntu System

Other Linux 5 Responses »

Jan 082007

A DNS server resolves domain names into IP addresses. So when you request “yahoo.com” for example, the DNS server finds out the address for the domain, and sends your request the right way.

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ubuntu nameserver 127 0 0 1 (14)
prepend domain-name-servers 127 0 0 1; (13)
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Show and hide the GRUB Menu on Ubuntu

General No Responses »

Jan 012007

When your Ubuntu Machine boots, you can see GRUB loading. please wait… Press Esc to enter the menu…

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Manage Linux init or startup scripts

General 2 Responses »

Dec 072006

Init scripts are small shell programs that usually control services, also known as daemons. Other applications for init scripts involve simply controlling the state of something such as hdparm (HDD sleep timeouts), iptables (loading firewall rule-sets into the kernel) and setserial (COM port configuration).The /etc/init.d directory contains the scripts executed by init at boot time and when the init state.

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