Use the following script if you want to reallocate the content of your swap area back to RAM. Before doing this, make sure you have enough free memory. #!/bin/bash echo -e “\nOutput of free before:” free swapoff -a ; swapon -a echo -e “\nOutput of free after:” free echo “”
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 »
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 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 »
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 »
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 »
Getting this error message while trying to bring up your newly configured bridge interface on RHEL/CentOS Linux? You are missing “bridge-utils” package. Simply install it as followed and bring up the interface again : yum install bridge-utils NOTE : Click here to see our HowTO create a bridge interface article
Here is how to turn on user automatic logon for Windows 7 and Windows Server 2008. Windows 7 : Both options are available (using the GUI or directly modifying the registry as for Windows Server 2008). – Start > Run – Type “control userpasswords2” – Then click OK [x] > [ ] Uncheck the box… Read More »
On modern/latest Linux and Unix distributions, system rely on UUID rather than disk device name itself. To find out the UUID, you can use this simple command called “blkid” : blkid <DEVICE_PARTITION_NAME> Example : blkid /dev/sda1 Will return something like this : /dev/sda1: UUID=”1abd977f-65e0-46ab-b2bb-3651053c6e77″ TYPE=”ext4″
Seeing such message in your system logs? general protection rip:803886e rsp:ffc22690 error:0 This mean you have a hardware fault. Can be likely memory, but can be something else as well. *RIP is the 64 bit execution pointer.