You probably experienced VPN session disconnection exactly 24 hours after you established the connection. Well, this is an expected behaviour since the OpenVPN Access Server implement a default 24 hours session timeout for user-locked and server-locked profiles. To workaround this limitation, you may set the timeout to a higher value using the following command : /usr/local/openvpn_as/scripts/sacli… Read More »
Whatever you’ve been using Centrify for a month or years on a Linux machine joined to an Active Directory Domain Controller, login using an AD user might suddenly stop work and display the following error message in the system logs (/var/log/message) : adclient[4933]: INFO <bg:ageBindings> base.bind.healing Lost connection to pdc.ad-forest.domain.tld. Running in disconnected mode: KDC refused… Read More »
Starting with Windows Server 2008 R2/2012, the fancy remote management feature may return the following error when adding to your centralized Server Manager console : Computer <NAME> cannot be managed. Verify that the network path is correct, the computer is available on the network and that the appropriate Windows Firewall rules are enabled on the… Read More »
If you have a large amount of data to transfer over the network to another server, Rsync is definately a good way to go. However, since Rsync is using SSH, data encryption can add an extra bottle neck to your speed transfer. You may want to disable encryption if you are transfering locally or if… Read More »
Oracle Cluster File System 2 (well known as OCFS2) is a pretty decent choice when come to chose a filesystem that need to be accessed and written using several server nodes. Unfortunately, RedHat do not support by default OCFS2 in their kernel since they are using GFS instead. I am not aware of any unofficial… Read More »
Having this error on your R1Soft policy for a one or several servers? Error replicating device <PARTITION_MOUNTPOINT> (<PARTITION_UUID>) Protocol error, expected request finished Encountered <0000> read failures! Snapshot failed with error ‘FILE IO ERROR’! An exception occurred during the request. Backup failed due to snapshot error! The next replication will force a full block scan. This is likely… Read More »
Have you encountered the following error starting MySQL server on a new machine that you’ve copied over the databases folder from another server? 140612 21:38:29 mysqld started 140612 21:38:29 InnoDB: Operating system error number 13 in a file operation. InnoDB: The error means mysqld does not have the access rights to InnoDB: the directory. InnoDB:… Read More »
I had this interesting issue lately on Windows Server 2008 R2 where the shared printer just vanishing from the directory/shares on and off. Here is what I did to resolve this issue. If you do not have the Print Server role installed, you will need the Print Management Tools to actually view all your printers.… Read More »
APC (Alternative PHP Cache) come with a nice script (apc.php) that will sort and show you the memory usage and hit ratio of pages cached into APC memory. Do these easy steps to set this up on your Web server. Copy the script from APC folder into a vHost on your Web server (this example… Read More »
Since CentOS/RedHat Enterprise Linux 6, “mod_file_cache”, commonly referred as “MMapFile” too is no longer provided with Apache binary. File Cache module statically map file pages into memory. This module is still experimental according to Apache documentation, which may explain why it’s not included, even though it was included in CentOS/RHEL5. You may get the following… Read More »