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Tag: Centos

Centos: Release 5 now “end of life”

On 2017, March 31th the official Release End of Version 5 is reached. This also touches SME Server Version 8.1. If you use this you must now upgrade the Webserver to the next Version. Checkout which last version offers latest Options like PHP7, MYSQL 6 ..more Checkout that you current Content PHP Kits Support the new OS Options (PHP7) As Remark you should do at first a FULL BACKUP of your DATA!! see here Save manual the /etc folder to Backup, dump crontabs and firewall settings! (ufw) Setup a fresh OS if you are not a Professional Admin cause to […]

Debian: Update SSD Firmware without CDROM

If you want to update the SSD Firmware of a device you should know some things: Do you REALLY need the update? Bugs? If NOT exit here! Firmwareupdates can destroy DATA on Drives! Data cant be restored if the Controller fails after Update Downgrade a Firmware to older is most IMPOSSIBLE!! .. now you need a USB Stick 4GB and the ISO File of the Firmware Disk of the Manufacter then open the Gnome Terminal or Console and: $sudo su – #become root $apt-get update && apt-get install unetbootin gparted # install the tools $dd if=/dev/null of=/dev/sdc bs=10240 count=1 # […]

Linux FreeBSD: Protect your Disc Data against power loss

Problem: If you use IDE or SATA Disc Drives inside your Workstation or Server without a additional uninterruppted power supply after a power loss your Disc Drives can lose data, do not boot clean up agian or damage the drive headers and sectors. Background: SATA or IDE Drives uses “Disc Cached Controllers”, the count of this disc cache reach from 8 to 64 megabytes. In case of data write to disc, the disc controllers do cache some data who are often used. A Raid 1 Disc Mirror is affected too by this problem. SCSI od SAS are not using Cache […]

How to compile the Centos SME Server 7.4 Linux Kernel 2.6.34

Download the latest stable kernel from the http://www.kernel.org/ unpack the downloaded source file. Steps: # wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.34.tar.bz2 # tar xjf tar xjf linux-2.6.34.tar.bz2 # ln -s linux-2.6.34 linux # cd linux # cp /boot/config-`uname -r` ./.config # make menuconfig (here you can select .config as preselected .config from old kernel) # make rpm (Compile the Kernel and make a rpm-paket) During the compilation of linux-2.6.34 kernel the following error appears drivers/message/fusion/mptsas.c: In function `mptsas_port_delete' drivers/message/fusion/mptsas.c: 105: sorry, unimplemented: inlining failed in call to 'mptsas_set_rphy': function body not available drivers/message/fusion/mptsas.c: 467: sorry, unimplemented: called from here Because: The ‘mptsas_set_rphy’ function is […]

SME Server Centos Red Hat speedup disable unneeded services sound pcmcia cpuspeed

Problem: The default installation setup some unneeded services like pcmcia or sound or cpuspeed Solution: log into your server as root run/sbin/chkconfig –list to see active services run/sbin/chkconfig –level 2345 pcmcia off to disable pcmcia cause a server does not have pcmcia edit the /etc/modprobe.conf and switch off sound-modules with alias "name-module" off run after reboot #/sbin/lsmod to control the disabled sound modules if they are not seen they are not active NOW you have reduced memory load and processes at cpu can speed up your CPU and save energy (at my Epia 533Mhz may be 3Watts at hour)

Centos: Yum Installer Howto

yum (Yellow dog Updater, Modified) ist eine RPM-Paketmanagement-Programm, das, aehnlich wie apt/RPM, automatisch Abhaengigkeiten aufloest. Es wird u.a. zur Zeit als Standard Paketmanager in Fedora Linux genutzt. Pakete installieren/updaten/entfernen: Installation von RPMs: yum install paket Upgrade einzelner Pakete (nur bereits installierte Pakete): yum update paket Upgrade des kompletten Systems: yum upgrade Deinstallation von Paketen: yum remove paket Paketsuche Welches Paket enthält die Datei oder welches Feature ist vorhanden: yum provides dateiname Gibt es dieses Paket überhaupt: yum list paket Informationen anzeigen Verfügbare Pakete anzeigen: yum list available Updatebare Pakete anzeigen: yum list updates Aufraeumen Heruntergeladene Pakete wieder loeschen: yum clean […]