Linux : Call Trace security_ops_task_setrlimit

Did you noticed the following message booting up CentOS/RHEL 5.9? You need to implement a remote task_setrlimit in your security module and call it directly from this functionWARNING: at security/security.c:51 security_ops_task_setrlimit() Call Trace: [<ffffffff8012f117>] security_ops_task_setrlimit+0x87/0x96 [<ffffffff8009dcd6>] do_prlimit+0xd7/0x1d2 [<ffffffff8009ee1f>] sys_setrlimit+0x36/0x43 [<ffffffff8005d29e>] tracesys+0xd5/0xdf According to RedHat, this message is harmless and can be safely ignored unless you’re defining… Read More »

Linux : VirtualHost 0.0.0.0:443 overlaps perhaps you need a NameVirtualHost directive

Getting this message after adding a new VirtualHost using a dedicated IP address? [warn] VirtualHost 0.0.0.0:443 overlaps with VirtualHost 0.0.0.0:443, the first has precedence, perhaps you need a NameVirtualHost directive Well, you probably forgot a NameVirtualHost directive with the dedicated IP as followed, before the declaration of any VirtualHost in the config : NameVirtualHost 0.0.0.0:443… Read More »

Windows : Active Directory install failed error 2147021879

While trying to install Active Directory Domain Service though Server Manager on Windows 2008 R2, the installation failed without much detail. If you have a look at : %appdata%\Local\Temp\ServerManager.Log %appdata%\Microsoft\Windows\ServerManager\ServerManagerExceptions.log You will find something like this : 2404: 2013-08-21 20:41:59.643 [CbsUIHandler] Error: -2147021879 : 2404: 2013-08-21 20:41:59.643 [CbsUIHandler] Terminate: 2404: 2013-08-21 20:41:59.706 [InstallationProgressPage] Verifying installation…… Read More »

Linux : How to show boot progress on CentOS6/RHEL6

Since CentOS6/RHEL6, boot messages are hidden behind a splash screen that display a progress bar. To show the boot progression, simply press the “arrow up“ key. To make the change permanently, edit the Grub configuration file : /boot/grub/grub.conf And remove the following : rhgb quiet

Windows : BSOD 0x0000006B Process1_Initialization_Failed

Windows 7 or Server 2008 might display a blue screen of death booting your system such as : PROCESS1_INITIALIZATION_FAILED *** STOP: 0x0000006B This can be a filesystem issue or hardware related such as ; bad disks, bad or incorrect cables. The first steps for resolution would be : – Boot in recovery and open the Command tool… Read More »

Linux : Error reloading named domain.tld.hosts:0: ignoring out-of-zone data (domain.tld)

Getting this error reloading named on your secondary name server after creating a new zone? domain.tld.hosts:0: ignoring out-of-zone data (domain.tld) domain.tld/IN: has 0 SOA records domain.tld/IN: has no NS records domain.tld/IN: not loaded due to errors. _default/domain.tld/IN: bad zone This probably mean you are missing server “type” for one zone somewhere in your named.conf :… Read More »

JunOS : Interface must already be defined commit error

Getting this error trying to add a layer 3 routing interface (l3-interface) to a VLan on JunOS? root@EX4200# set vlans v1000 l3-interface vlan.1000 root@EX4200# commit comment “add l3-iface to vlan 1000” [edit vlans v1000 l3-interface] ‘l3-interface vlan.1000’ Interface must already be defined under [edit interfaces] error: commit failed: (statements constraint check failed) [edit] root@EX4200#  … Read More »

Linux : ata: failed command: READ FPDMA QUEUED

Got “READ FPDMA QUEUED” errors from “dmesg” output on your Linux machine? ata2.00: status: { DRDY ERR } ata2.00: error: { UNC } ata2.00: failed command: READ FPDMA QUEUED ata2.00: cmd 60/28:70:28:19:89/00:00:6c:01:00/40 tag 14 ncq 20480 in res 41/40:00:00:00:00/00:00:00:00:00/00 Emask 0x9 (media error) This probably mean you have controller driver issue. Some controllers have known… Read More »

Debian : Resume apt-get after SSH timeout

Your SSH connection get cut or timeout while you were either updating or installing an application with apt-get? Don’t worry, these easy steps will get you out of trouble! 1. Try to run your command again : root@server:~# apt-get install <app_name> E: Could not get lock /var/lib/dpkg/lock – open (11: Resource temporarily unavailable) E: Unable… Read More »

Linux : DirectAdmin Cannot find /usr/include/et/com_err.h

Get the following error installing DirectAdmin? *** Cannot find /usr/include/et/com_err.h. (yum install libcom_err-devel) *** Installation didn’t pass, halting install. Once requirements are met, run the following to continue the install: cd /usr/local/directadmin/scripts ./install.sh As suggested by the installer, you need to install “libcom_err-devel” package as followed : yum install libcom_err-devel libcom_err To resume the installation,… Read More »