Archive for June, 2010

SBDavid

Enable Mailman in Plesk

Enable Mailman in Plesk

The following steps will show you how to enable Mailman.

1. Login to Plesk.
2. Click on Server.
3. Click on Set Up Mailman.
4. Configure Mailman by providing the Mailing list administrator’s email and password.
5. Once you hit OK you should be taken back to the server page with the message letting you know that the Mailman icon will no longer be accessible.

For information on using Mailman please visit http://www.gnu.org/software/mailman/index.html

How do I apply package updates from the Red Hat Network?

Systems must be registered before updates from RHN can be applied. This can be done by using the “Software Updater” application from the “System Tools” menu, or via the command line by using the “rhn_register” command.

To access updates from RHN when using Red Hat Enterprise Linux 5, launch the graphical update tool through Applications -> System Tools -> Software Updater, or from the command line via the following command:

# pup

For a command line interface, use the following command to update the operating system:

# yum update

To install a specific package, such as elinks, use the following command:

# yum install elinks

To update a specific package, such as httpd, use the following command:

# yum update httpd
SBDavid

Some common Linux kernel processes

Some common Linux kernel processes

kjournald Commits ext3 journal updates to disk
kswapd Swaps processes when physical memory is low
kreclaimd Reclaims memory pages that haven’t been used recently
ksoftirqd Handles multiple layers of soft interrupts
khubd Configures USB devices

There is one kjournald for each mounted ext3 filesystem.

Among these processes, only init is really a full-fledged user process. The others are actually portions of the kernel that have been dressed up to look like processes for scheduling or architectural reasons.

How can I lower the TTL value in Plesk?

1. Login to Plesk.
2. Click on Domains.
3. Click on the domain for which you wish to lower your TTL.
4. Click on DNS Settings.
5. Click on SOA Record.
6. Set the desired TTL value.

TTL, or Time-to-Live, is the length of time for when a zone file is set to expire. This is usually expressed in number of seconds.

If you ask your local DNS server (usually provided by your ISP) for an Internet address, the server will figure out where to find an authoritative answer. Once provided the answer, it will keep the answer in a local cache so that if you, or someone else, ask for the same address again it will not need to make the request again.

When domain administrators configure their DNS records, they decide how long the records should remain in remote caches. Typically, a remote server will only cache those records for the length of time specified by the TTL. After that, the remote server will remove the zone file from its local cache and ask again for an authoritative answer. Due to this, shorter TTLs can cause heavier loads on an authoritative nameserver.

How to set up one domain to be your DNS in Plesk

You must first have the domain you wish to make your DNS already set up in Plesk. You will also need at least 2 IP’s to use for your server. For reference, in this article ’serverbuddies.com’ will refer to the domain name you are using. Make sure to replace this with your actual domain name.

1. Log into your Plesk control panel as Administrator and select the domain from the Domains list you wish to make DNS.
2. Select the DNS icon from your services list.
3. Select the link serverbuddies.com from the Host list, with Record Type NS and Value ns.serverbuddies.com
4. In the Enter nameserver field change the ns.serverbuddies.com to ns1.serverbuddies.com and select OK.
5. From the Tools area select Add Record. For Record type select NS and enter ns2.serverbuddies.com in the Enter nameserver field and select OK.
6. Select from your host list ns.serverbuddies.com with Record type A and change the value to ns1 and select OK.
7. From the Tools area select Add Record again. For Record type leave as A, in the Enter domain name add ns2, in the Enter IP address enter your second IP address that you are going to use and select OK.
8. You should now have 2 Record types with the NS value of ns1.serverbuddies.com and ns2.serverbuddies.com and under the Host list you will also have ns1.serverbuddies.com and ns2.serverbuddies.com with the Record type of A and they will have 2 separate IP’s.

In order to have these added as DNS values for when you add new domains you will need to change the default DNS record in Plesk.

1. Select Server from the list on your left.
2. Select the DNS icon from the Services list.
3. From the Host list select with record type NS and enter ns1.serverbuddies.com in the Enter nameserver field and select OK.
4. From the Tools area select Add New Record. Change the Record type to NS and in the Enter nameserver field input ns2.serverbuddies.com and select OK.

If you want to use 2 separate domains for your DNS this is even easier, because Plesk has already created this for you. You must have 2 domains entered in Plesk and assigned separate IP’s. You would then only need to create a DNS zone template the same way described earlier, only inputting ns1.serverbuddies.com and ns2.serverbuddies.com for your default values.

Reference: http://parallels.com/

« Prev - Next »