ServerBuddies Support Blog

Renaming Files

To rename all files in a directory and add a new extension the xargs command can be used:

xargs reads each item from the ls ouput and executes the mv command. The ‘-i’ option tells xargs to replace ‘{}’ with the name of each item. The ‘-t’ option instructs xargs to print the command before executing it.

Simple implementation of NAT

Internal network connects to the internet with a dynamic public IP address.

nat:

This table is consulted when a packet that creates a new connection is encountered. It consists of three built-ins: PREROUTING (for altering packets as soon as they come in), OUTPUT (for altering locally-generated packets before routing), and POSTROUTING (for altering packets as they are about to go out).

Repairing MyISAM mySQL Tables and Databases:

Repairing MyISAM mySQL Tables/Databases.
Please note that we assume your mySQL data directory is /var/lib/mysql

To find out the largest number of established connections you can simply use something like

To see the list of the top 10

To view all

Disable ping request to the server

Diable ping using the following type:

or

As superuser, add the following lines to /etc/sysctl.conf

Then run the following command to cause the change to take effect immediately:

This change will persist following a reboot.